Guide
Do you tip before or after tax?
What the convention actually is, how much the difference comes to, and how service charges, discounts and gift cards change the answer.
The convention is to tip on the pre-tax subtotal. In practice most people tip on the total, and the difference is usually smaller than the argument about it.
What the difference actually comes to
Sales tax on restaurant meals typically runs 6–10%. Tipping 20% on a total that includes 8% tax means you tip 20% on the tax as well — an extra 1.6% of the bill.
| Subtotal | Tax at 8% | 20% on subtotal | 20% on total | Difference |
|---|---|---|---|---|
| $30 | $2.40 | $6.00 | $6.48 | $0.48 |
| $50 | $4.00 | $10.00 | $10.80 | $0.80 |
| $80 | $6.40 | $16.00 | $17.28 | $1.28 |
| $150 | $12.00 | $30.00 | $32.40 | $2.40 |
| $300 | $24.00 | $60.00 | $64.80 | $4.80 |
On a normal dinner the difference is under a dollar. It only becomes real money on large group bills — which is precisely where it is worth being deliberate, because a $300 table repeated weekly is $250 a year.
Why pre-tax is the convention
A tip is payment for service. Sales tax is money the restaurant collects on behalf of the state and never keeps, so it reflects nothing your server did. Tipping on it means tipping on a government levy, and it means an identical meal earns the server more in Chicago than in Portland purely because of tax policy.
Etiquette authorities and most restaurant industry guidance agree on pre-tax. That said, nobody in the room will notice or object either way, and rounding up to a convenient number is entirely normal.
Discounts, coupons, and promotions
Tip on the pre-discount amount. The server carried the full meal regardless of what you paid for it, and a two-for-one voucher halves the bill without halving the work.
| Situation | Tip on | Why |
|---|---|---|
| Coupon or voucher | The full menu price | Same service delivered |
| Happy hour pricing | The discounted price | The lower price is the real price at that time |
| Comped item after a mistake | The original bill | The kitchen still made it, and the fix took extra work |
| Gift card payment | The full meal value | How you settled up is unrelated to the service |
| Loyalty points redemption | The full menu price | You already paid for the points elsewhere |
Service charges and automatic gratuity
A service charge is not a tip. It is revenue belonging to the restaurant, which may or may not distribute it to staff, and it is frequently taxable where a voluntary tip is not.
- Automatic gratuity for large parties — usually 18–20%, and no additional tip is expected.
- Service charge on the bill — check whether it goes to staff. In many places it legally does not have to, and asking is reasonable.
- Both a service charge and a tip line — you are being asked twice. The tip line is optional.
In the UK, an optional service charge of 12.5% is standard and can be removed on request. Since 2024 legislation there requires service charges to be passed to staff in full, which changed the calculation considerably.
Card, cash, and when the money arrives
The amount is identical. What differs is timing and, in some places, deductions.
Card tips typically reach staff through the next payroll run, one to two weeks later, and in some jurisdictions employers may deduct the card processing fee — usually 2–3% — from the tipped amount. Cash is immediate and unprocessed. That is the entire reason some servers prefer it, and it is a reasonable preference rather than anything suspicious.
How much, by situation
| Situation | Usual range | Base |
|---|---|---|
| Sit-down restaurant | 18–20% | Pre-tax subtotal |
| Bar, per drink | $1–2 | Flat, not a percentage |
| Food delivery | 15–20%, minimum $3–5 | Order subtotal |
| Carry-out | 0–10% | Nothing expected |
| Buffet | 10% | Drinks and clearing only |
| Catering delivery | 10–15% | Check for an existing service charge |
The mental shortcut
For 20% of the subtotal: move the decimal point one place left and double it. A $47 subtotal gives $4.70, doubled to $9.40. For 18%, take that 20% figure and subtract a tenth of it — $9.40 minus $0.94 is $8.46.
Where sales tax happens to be close to 10%, doubling the tax line gives roughly a 20% tip on the subtotal, which is where that piece of folk wisdom comes from. It only works at that specific rate.
Split a bill
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