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Tip Calculator India: GST-Aware Bill Splitting with Service Charge Guide

The only tip calculator that strips GST before computing your tip, handles the optional service charge correctly under CCPA rules, and rounds to a clean โ‚น10 or โ‚น50 for cash and UPI.

GST-aware base calculation Service charge deduction Split among any group Clean UPI rounding 6 venue tip guides Comparison table

Pre-Tax Gratuity Model: Tip on Net Bill After GST and Service Charge

Enter your bill, GST rate, and tip percentage. We calculate on the correct pre-tax base.
GST is stripped before computing your tip. Tip on food value, not tax.
Service charge is legally optional in India per CCPA guidelines (Jan 2026). If included, it replaces your tip. Enter 0 if you are waiving it or if it is absent.
Common range in India: 5 to 15%. Leave 0 if service charge covers it.
Tip amount
Rs 0
Enter bill details and calculate
Bill breakdown

Why Is Tipping in India So Confusing?

Ask a hundred Indians how much to tip at a restaurant and you will get a hundred different answers. Some say 10 percent. Some say nothing if there is a service charge. Some say they always leave 50 rupees regardless of the bill size.

The confusion is real, and it costs people money in two directions: either they tip twice (once via service charge, once in cash) or they feel guilty leaving nothing when the service was genuinely good.

Three different amounts can appear on an Indian restaurant bill and each behaves differently. GST is a government tax, not negotiable and not a tip. Service charge is the restaurant’s own add-on, legally optional under CCPA guidelines reaffirmed in January 2026, and if present it functions as the built-in tip.

A voluntary gratuity is what you add yourself, in cash or UPI, and it goes (ideally) directly to the staff. Getting these three apart is the whole game, and no other tip calculator in India currently does that correctly.

The math question that follows is: should you tip on the GST-inclusive total or the food value before tax? The honest answer is the food value. Tipping on the GST-inflated total means some fraction of your tip is calculated on a tax that the staff never sees.

A โ‚น1,000 bill at an AC restaurant carries โ‚น153 of GST at 18 percent. Tipping 10 percent on โ‚น1,000 gives the server โ‚น100. Tipping 10 percent on the pre-tax base of โ‚น847 gives them โ‚น85. Neither amount is wrong, but knowing the difference lets you make a deliberate choice rather than an accidental one.

How Does the Service Charge Rule Actually Work?

The Central Consumer Protection Authority issued guidelines in 2022 that restaurants cannot levy service charges automatically, cannot hide them in the food price, and cannot prevent entry or service to customers who refuse to pay.

The CCPA reaffirmed this position in January 2026. The legal position is clear: service charge is optional, you can ask for it to be removed, and the restaurant must comply.

In practice, most mid-range and upscale restaurants still print the service charge line, typically 5 to 10 percent. Most customers pay it without question, which is fine.

The point is that you have a legal right to refuse it, and if you do pay it, you are under no obligation to tip additionally. The service charge is the restaurant’s mechanism for pooling and distributing gratuities to all staff. Adding a cash tip on top is a personal choice, not an expectation.

Where it gets tricky is budget and quick-service restaurants where no service charge appears. These staff members rely entirely on voluntary tips, and a 5 to 10 percent cash tip here matters more than in a fine-dining room where a 10 percent service charge is already embedded in the bill.

The calculator lets you enter the existing service charge percentage, deducts it from your tip base, and tells you exactly what additional gratuity (if any) is appropriate. That is the workflow no other Indian tip calculator offers.

Tipping Norms by Venue: What to Leave Where

Tipping in India varies significantly by the type of service. Use these as a starting point and adjust for exceptional or poor service.

๐Ÿฝ
Restaurant
5 to 15% if no SC ยท 0 to 5% extra if SC included
๐Ÿ›ต
Delivery rider
Rs 20 to Rs 50 per order via app or cash
๐Ÿจ
Hotel bellboy
Rs 50 to Rs 100 per bag or service
๐Ÿ’‡
Salon or spa
10% or Rs 50 to Rs 200 flat
๐Ÿš•
Cab or auto
Round up ยท Rs 20 to Rs 50 for longer trips
๐Ÿงน
Housekeeping
Rs 50 to Rs 100 per night left on the bed

GST Rates on Indian Restaurant Bills: A Reference Guide

Understanding GST rates on restaurant bills

Restaurant typeGST rateNotes
Non-AC restaurant or standalone takeaway5%No input tax credit available to restaurant
AC restaurant (in a hotel with room rate under Rs 7,500)5%Standard AC dining rate
Restaurant in a hotel with tariff above Rs 7,50018%Luxury tier, full GST
Outdoor catering or banquet18%With input tax credit
Home delivery (Zomato or Swiggy)5%On food value; platform fee taxed separately

If you are unsure of the type, check the bill: the GST amount is printed alongside the GSTIN of the restaurant. You can also look up the restaurant on the GST portal using their GSTIN to confirm their registration category. For practical purposes, any restaurant with central air conditioning that is inside a hotel charging above Rs 7,500 per night will attract 18 percent; standalone AC restaurants and all non-AC eateries fall under the 5 percent rate. Cloud kitchens and delivery-only operations that have no dine-in premises also fall under the 5 percent category in most configurations. Divide it by the food subtotal to find the effective rate. Use that rate in the calculator’s GST field for the most accurate pre-tax base.

How Does the Tip Calculation Actually Work?

The arithmetic behind a tip is simple: a percentage of the base amount. The questions that make it complicated in India are what counts as the base amount and what you are supposed to do with the service charge line. This tool works through both questions explicitly.

Step one: find the pre-GST food value

If you know the GST rate on your bill, the pre-GST food value is the total divided by one plus the decimal rate. An Rs 1,180 bill at 18 percent GST contains Rs 1,000 of food value and Rs 180 of tax. An Rs 1,050 bill at 5 percent contains Rs 1,000 of food and Rs 50 of tax.

If you do not know the rate, look at the GST line on the bill and divide it by the food subtotal to find it. For most sit-down restaurants with air conditioning, the answer is either 5 or 18 percent. For non-AC or standalone eateries, it is 5 percent.

Step two: handle the service charge

If a service charge appears on your bill, enter its percentage in the calculator. The tool deducts the rupee value of that service charge from the tip base, so your tip calculation applies only to the portion of your bill that is not already covered by the built-in gratuity.

If you are waiving the service charge under your CCPA rights, enter zero and the full food value becomes your tip base. If you are paying it, and you still want to leave a small additional amount for exceptional service, enter the SC percentage and set a small tip percentage like 2 to 5 percent for the extra top-up.

Step three: pick your percentage and round

Apply your chosen percentage to that net base. The comparison table in the calculator shows what the tip looks like at seven common percentages from 5 to 20 percent simultaneously, so you can see the full range before committing.

Once you have a figure, use the round-up buttons to convert it to the nearest Rs 10 or Rs 50 for clean cash or UPI payment. A tip of Rs 143 becomes Rs 150, which is easier for everyone and no one minds the extra Rs 7.

Indian Tipping Culture: How It Differs from Western Norms

The tipping system in the United States, where workers rely on tips to make up the gap between a sub-minimum tipped wage and standard minimum wage, does not exist in India. Indian restaurant and hotel staff are covered under the Minimum Wages Act 1948 and receive a full salary from their employer, unlike in the United States where federal law permits a tipped minimum wage below the standard minimum and tips are expected to make up the difference. The Indian system means that when you tip, you are genuinely giving something extra rather than participating in a wage subsidy the employer has factored into the menu price. Tips are genuinely optional bonuses, not a disguised wage subsidy. If you are visiting or travelling to the United States, tipping expectations there are considerably higher: 15 to 20 percent is standard at restaurants, and a bill splitter is almost always needed for group dining. The US Tip and Bill Splitter Calculator from USCalculators is a useful reference for understanding American tipping norms before your trip.

That said, Indian tipping norms have shifted noticeably over the past decade. A generation ago, a 7.5 to 10 percent tip or a flat small note was the standard at mid-range restaurants. Today, higher-income urban diners are more likely to leave 10 to 15 percent, partly influenced by global travel and the visibility of tipping culture through streaming media and social platforms.

At a premium restaurant in Mumbai, Delhi, or Bengaluru, a 10 percent tip on top of a nil service-charge bill is considered standard. At a budget local restaurant, any tip at all is a bonus.

Where India differs most sharply from Western practice is in the gig economy. Food delivery riders on Zomato and Swiggy work under a piece-rate model where their earnings are directly tied to the number and distance of deliveries. In bad weather, on a long run, or for a large order, a Rs 30 to Rs 50 in-app tip meaningfully improves their hourly return.

This is perhaps the one context in Indian tipping where the Western logic of tipping as income supplementation most closely applies, and where the habit of tipping via the app has grown fastest among urban consumers who understand the delivery model.

Worked Examples: Three Groups, Three Indian Cities

These examples follow the exact calculation the tool runs, each in a different city and scenario, from a solo diner to a large group navigating a service charge dispute.

AR
Anika in Mumbai
Solo diner at a fine dining AC restaurant
Mumbai

Anika has dinner at an upscale AC restaurant in Bandra. The bill comes to Rs 2,360 including 18 percent GST and a 10 percent service charge. She wonders how much, if anything, to add. The pre-GST food value is Rs 2,360 divided by 1.18, which is Rs 2,000.

The restaurant has already levied Rs 200 as service charge on that base. Since the service was good but not extraordinary, Anika decides the service charge covers her tip adequately. She pays the bill as presented with no additional tip, which is entirely her right under CCPA guidelines.

Bill with GSTRs 2,360
Pre-GST baseRs 2,000
SC already on billRs 200
Extra tipRs 0
Takeaway: when service charge is on the bill, it replaces the tip. Knowing this saves Anika from tipping twice without meaning to.
VS
Vikram and friends in Delhi
Group of 5 at a mid-range non-AC restaurant
Delhi

Vikram and four colleagues have lunch at a non-AC dhaba-style restaurant in Connaught Place. The total bill is Rs 3,150 including 5 percent GST, no service charge on the bill. The pre-GST food base is Rs 3,150 divided by 1.05, which is Rs 3,000.

They want to leave a 10 percent tip on the food value: Rs 300. Split five ways, each person pays Rs 690, which includes Rs 60 tip each. Since Rs 300 is already a round number, no rounding adjustment is needed, and they leave the cash directly with the server rather than adding it to the card transaction.

Bill with GSTRs 3,150
Pre-GST baseRs 3,000
Tip (10%)Rs 300
Per personRs 690
Takeaway: at a no-service-charge restaurant, a 10 percent tip on the food base is straightforward and the staff keeps every rupee of it.
PS
Priya in Bengaluru
Delivery order with a large group gathering
Bengaluru

Priya orders dinner for eight people via a food delivery app for a house gathering in Koramangala. The app total is Rs 4,200 at 5 percent GST, no service charge. Pre-GST food value is Rs 4,000. She wants to tip the delivery rider and the restaurant separately. For the rider, she selects a Rs 50 in-app tip, a standard amount for a large order on a long delivery run.

For an additional gesture to the restaurant kitchen, she notes that leaving a review and reordering is often more valuable than a payment tip on delivery. The per-person food cost before tip is Rs 525; rounded to the nearest Rs 50 it becomes Rs 550 each, with the Rs 200 difference covering the rider tip and a small buffer.

Delivery totalRs 4,200
Rider tipRs 50
Per person (8)Rs 525
Rounded toRs 550
Takeaway: delivery tipping in India works best as a flat amount to the rider rather than a percentage of the food bill, and the UPI rounding feature makes group collection clean.

Six Tips for Tipping Well Without Overthinking It

01
Check for service charge before reaching for cash. Scan the bill for a line that says service charge, SC, or similar before pulling out extra notes. If it is there and the service was acceptable, it covers your tip obligation entirely. Paying it twice is a common and silent waste.
02
Tip on the food value, not the tax-inflated total. The GST portion of your bill is government revenue, not restaurant income. Calculating your tip on the pre-GST base means your generosity goes toward the people who served you, not toward a tax that is already collected.
03
Use cash or UPI for tips when possible. Card tips sometimes get pooled or delayed before reaching staff. Cash handed directly to the server, or a UPI transfer using the round-up feature, ensures the money arrives immediately and in the right hands.
04
Round to a convenient denomination. A tip of Rs 47 is awkward in cash and slightly odd over UPI. Rounding up to Rs 50 or Rs 100 is smoother for everyone, and the calculator’s round-up buttons do this instantly so you never have to do mental arithmetic at the table.
05
Tip delivery riders in the app, not just in cash. In-app tips on Zomato and Swiggy are tracked against the rider’s account and form part of their verified income, which matters for their financial records. A Rs 20 to Rs 50 in-app tip is more useful to a rider than the same amount in cash.
06
Know when to refuse a service charge legally. If the service was genuinely poor or the charge was added without your knowledge, ask the manager to remove it. The CCPA position is unambiguous: the restaurant must remove it on request. You can be polite about it without feeling unreasonable.

Group Dining and Bill Splitting Made Simple

Splitting a restaurant bill among friends sounds simple until someone has the GST question, someone else paid for drinks at the bar separately, and the person who ordered the most expensive item suggests splitting equally. A tip calculator that handles groups properly saves an awkward few minutes at the table every time.

The cleanest approach for a group is to decide the tip percentage collectively before anyone opens their wallet, then use the per-person output from this calculator as the collection target. If the per-person share comes to Rs 743, the round-up button converts that to Rs 750 and everyone pays the same clean number. No one needs to calculate anything in their head, and the tip goes out as a deliberate group decision rather than a handful of whatever notes people found in their pocket.

For very large groups of ten or more, a different approach works better: calculate the tip as a flat amount based on the number of servers, rather than strictly as a percentage of the bill. Four servers attending a table of twelve worked as a team. Leaving Rs 200 each for the servers, a total of Rs 800, may be more or less than the standard 10 percent depending on the bill size, but it connects the tip to the actual labour provided. The calculator’s flat-tip mode lets you enter any amount and still see the per-person split so collection stays organised.

One practical note for group dining: avoid adding tips to the credit card settlement when possible. Most Indian point-of-sale systems do not prompt for a card tip, and asking the manager to process an add-on complicates the transaction. Pay the bill by card and pass the tip to the server in cash or via a personal UPI transfer. This is faster, guaranteed to reach the right person, and avoids any accounting friction for the restaurant.

What Indian Servers and Delivery Riders Actually Earn

Understanding the income context for service workers puts the tip decision in perspective. Restaurant servers in India typically earn between Rs 12,000 and Rs 20,000 per month depending on the city, the type of establishment, and their experience level. In Mumbai and Delhi, the cost of living means the lower end of that range leaves little margin. Tips are genuinely supplemental income at this salary level, not a rounding convenience.

Food delivery riders on gig platforms earn roughly Rs 15,000 to Rs 25,000 per month if they work full days, but this includes no paid leave, no employer’s provident fund contribution, and no health cover. Their per-delivery earnings have been compressed as platforms have grown and competition among riders has increased. The average delivery fee credited to a rider on a short city delivery is around Rs 25 to Rs 40. On a rainy evening when demand is high, the same rider might earn more per delivery, but they are also working in conditions that make the job significantly harder.

Hotel housekeeping staff in mid-range properties typically earn Rs 8,000 to Rs 15,000 per month and clean 12 to 16 rooms per shift. A Rs 100 tip from a guest is roughly an hour of their earning for three to four minutes of effort on your behalf. At that ratio, a small tip makes a disproportionate difference. These numbers are not meant to generate guilt; they are context for why tipping, even when voluntary and culturally optional in India, has real impact for the people on the receiving end. The practical takeaway is that a Rs 50 or Rs 100 tip from a diner who had a good experience costs very little in terms of the overall bill and matters considerably to the person who made that experience possible. That is the essence of voluntary tipping done well: it is proportionate, deliberate, and direct.

When to Tip More and When to Tip Less

Tipping is not a flat percentage applied mindlessly. The amount should reflect the actual experience, and calibrating it thoughtfully is how tipping works as a feedback signal rather than a tax. In India, where tipping is genuinely voluntary, this calibration matters more than in systems where the expectation is baked in.

Tip more when the service involved genuine personal attention, problem-solving, or skill. A server who remembered your dietary restriction without being reminded, a delivery rider who called ahead to confirm the address in heavy rain, a cab driver who found a faster route and explained why: these are services that went beyond the transaction and a slightly larger tip communicates that. At a sit-down restaurant, the difference between 10 and 15 percent on a Rs 2,000 bill is Rs 100, an amount that is negligible for most diners and material for the staff member.

Tip less, or nothing extra, when a service charge is already on the bill and the service was merely acceptable. Pay the bill as presented, do not feel obligated to add more, and move on. Similarly, at self-service or quick-service counters where no one brought you anything, a tip is not expected and there is no social norm requiring one. The digital tip prompts that increasingly appear on payment screens at cafes and takeaway counters are a nudge, not an obligation. You are entirely within your rights to press skip.

The most underrated tip decision in India is the delivery rider tip. Riders operate on tight margins, cover long distances in difficult urban traffic, and their earnings per order are lower than most diners realise when they see the delivery fee on the order screen. A significant portion of what you pay as a delivery fee goes to the platform, not the rider. In this context, a Rs 30 to Rs 50 in-app tip on any order above Rs 500 is a small fraction of the bill and a meaningful addition to a rider’s daily income. This is one context where erring on the generous side has clear and direct impact. Riders operate on tight margins, cover long distances in difficult traffic, and their earnings per order are lower than most diners realise. A Rs 30 to Rs 50 in-app tip on any order above Rs 500 is a small fraction of the bill and a meaningful addition to a rider’s daily income. This is one context where erring on the generous side has clear and direct impact.

Quick Reference: Tipping at a Glance

What is a tip?Voluntary payment to service staff, separate from the bill
Typical restaurant range5 to 15% of pre-GST food value
Service charge statusLegally optional per CCPA 2022 and 2026 guidelines
GST on non-AC restaurant5%
GST on AC or fine dining18% where hotel tariff exceeds Rs 7,500
Delivery rider tipRs 20 to Rs 50 flat per order
Hotel bellboy tipRs 50 to Rs 100 per bag
Salon or spa tipRs 50 to Rs 200 or 10% of service
Cab or auto tipRound up or Rs 20 to Rs 50 for long trips
Best payment methodCash directly to staff or in-app UPI tip

Tip Calculator Frequently Asked Questions

Is tipping mandatory in India?

No, tipping is entirely voluntary in India. Staff receive a full salary regardless of tips. A tip is a gesture of appreciation for good service, not an obligation.

At restaurants without a service charge, staff genuinely appreciate a 5 to 10 percent cash tip as a bonus on top of their regular pay, and it goes a long way given how modest the average hospitality salary is in India.

What is the difference between a service charge and a tip?

A service charge is a percentage added by the restaurant to your bill, typically 5 to 10 percent, before you pay. It is the restaurant’s own mechanism for distributing gratuities to all staff. A tip is something you add voluntarily yourself.

The CCPA clarified in 2022 that service charges are optional and restaurants cannot force you to pay them. If a service charge is already on your bill, it replaces the tip and you are not obligated to add more.

Should I tip on the GST-inclusive total or the food value?

The more logical approach is to tip on the pre-GST food value, because GST is government revenue that flows to the tax authority rather than to the staff. Tipping on the inflated total means part of your tip is calculated on a number that has nothing to do with the service quality or the food itself.

This calculator strips the GST first and computes your tip on the actual food and beverage subtotal, which is what most diners intend when they say they want to leave 10 percent.

Can I legally refuse to pay a service charge at a restaurant?

Yes. The Central Consumer Protection Authority issued guidelines in 2022, reaffirmed in January 2026, that restaurants cannot levy service charges automatically or force customers to pay them.

You have the legal right to ask for the service charge to be removed, and the restaurant must comply. If they refuse, that is a violation of CCPA guidelines and you can file a complaint on the consumer helpline at 1800-11-4000.

How much should I tip for food delivery in India?

A flat Rs 20 to Rs 50 per delivery is the common range, depending on the order size and distance. In-app tips on Zomato and Swiggy are better than cash because they are credited directly to the rider’s account and form part of their documented earnings.

For a large or heavy order or a delivery in heavy rain, Rs 50 or more is a considerate amount. There is no standard percentage for delivery; flat amounts work better for riders who handle many small orders throughout the day.

How do I split a bill with tip among a group?

Enter the full bill amount, the GST rate, any existing service charge percentage, your preferred tip percentage, and the number of people splitting.

The calculator shows the per-person total including their share of the tip, and the per-person tip contribution separately. The round-up buttons then let you pick a clean UPI or cash amount per head, such as Rs 500 or Rs 550, so group collection avoids awkward change.

What is a fair tip at a salon or spa in India?

For a haircut or standard salon service, Rs 50 to Rs 100 handed directly to the person who served you is a well-received tip. For a longer spa treatment or a service above Rs 1,000, a 10 percent tip or Rs 100 to Rs 200 is appropriate.

Tip in cash directly to the person rather than leaving it at the reception desk, since counter tips do not always reach the stylist.

Should I tip hotel housekeeping in India?

Yes, particularly in mid-range and budget hotels where housekeeping staff earn modest wages and rarely receive tips. Rs 50 to Rs 100 per night, left on the bed with a small note, is a considerate amount.

Leave the tip daily rather than at checkout, since different staff may service your room on different days and a single checkout tip may not reach everyone who cleaned for you.

How much should I tip a cab or auto driver?

For metered autos and short rides, rounding up to the nearest Rs 10 or Rs 20 is the typical gesture. For longer Ola or Uber rides, Rs 20 to Rs 50 is fair for good service or for assistance with heavy luggage.

App-based rides have an in-app tipping option post-trip; using it gives the driver a better rating signal and keeps the tip credited to their account. There is no percentage standard for cabs; flat rounding amounts are the norm in India.

What is the best way to pay a tip in India?

Cash is the most direct and universally accepted form for tips, particularly for restaurant staff and delivery riders who may not have a personal UPI QR at the table. Where an in-app tip option exists on Zomato, Swiggy, or Ola, it is preferable because it is tracked and credited reliably.

For informal tips to housekeeping or bellboys, cash is usually more appropriate. Keep a stack of Rs 50 and Rs 100 notes for tipping since ATMs mostly dispense Rs 500 notes that are too large for most tips.

Does the restaurant keep the service charge or does it go to staff?

This varies by restaurant and is not transparently disclosed in most cases, which is one reason the CCPA guidelines require that service charges not be presented as mandatory. Some restaurants pool and distribute service charges to all front-of-house staff.

Others retain it as revenue. If you want to ensure your gratitude reaches the person who served you, a cash tip directly in their hand is the only certain method, regardless of what the bill shows.

How should I tip when dining in a large group?

For large groups, designate one person to calculate the total tip using this calculator, then divide it per head and collect before paying. The comparison table shows tip amounts at common percentages so you can quickly agree on a figure the whole group is comfortable with.

Handing the tip in cash to the server or manager after settling the main bill ensures it goes to the right people rather than disappearing into the payment terminal.

Is it rude not to tip in India?

Not generally, though context matters. At a high-end restaurant with attentive tableside service and no service charge, leaving nothing might be noticed. At a busy canteen or cafeteria, no tip is entirely normal.

The useful frame is to ask whether the person serving you would benefit from a tip, whether the service was personal and attentive, and whether no service charge is already covering the expectation. If the answer is yes, a small tip is a kind gesture rather than a social obligation.

Why does this calculator compute tip on the pre-GST amount?

Because the purpose of a tip is to reward the people who served you, and GST is a tax that has nothing to do with service quality. When you tip on a GST-inclusive bill, some fraction of your tip is computed on government revenue rather than on the value of the food and service you received.

Computing on the pre-GST base aligns the tip with what the restaurant actually earned from your visit, which is the number that connects to the staff who served you.

What happens if I tip by adding to a card payment at a restaurant?

Most Indian restaurants do not have card terminals that prompt for a tip addition, unlike in the United States. If you want to add a tip to the card receipt, ask the manager to process an additional amount, though this is uncommon and sometimes creates accounting complexity.

For a card-paying diner who wants to tip, the simplest approach is to pay the bill by card and leave the tip separately in cash or via a personal UPI transfer. This way the tip reaches the server directly without passing through the restaurant’s accounts.

Are tips taxable income for the staff in India?

Technically yes: under Indian income tax law, tips received by an employee form part of their taxable salary income. In practice, cash tips are rarely declared or tracked by individual workers, and the tax department does not typically scrutinise small amounts.

Tips distributed through the employer, such as through a service charge pool, may appear in the salary slip and are taxed accordingly. This does not change anything for the diner, but it is worth knowing that a tip still represents meaningful supplemental income for a worker on a modest hospitality salary.

How do I know if a restaurant is hiding a service charge in the food price?

Look at your bill line by line before paying. A legitimate service charge will be labelled explicitly, usually as Service Charge or SC, and listed as a percentage of the food subtotal. It should not be embedded in individual item prices.

If the total is higher than the menu prices suggest and no explicit service charge line explains the difference, ask for a full itemised bill. Under consumer protection rules, restaurants must provide one on request. If a charge is unexplained, you have grounds to query or refuse it.