Which price should tax and tip apply to?
State the original or discounted base, check existing service charges, then split the total and allocate any cash-rounding remainder.
Everyday payments
Everyday payments
Calculate discounts, tips and equal bill shares with explicit tax and tipping bases. Compare payment totals, rounding conventions and worked examples.
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From question to result
Choose a path for your question
Calculate first, understand the formula and example, then compare your options. Each link answers a different question.
Calculator set
Everyday payments calculators
Open a calculator for an immediate estimate, then use its method notes, examples, limits, and sources to understand the result.
Discount CalculatorCalculate a discounted price, savings and tax applied after the discount. Enter a reduction percentage: a 20% discount means paying 80% of the original price.CalculateTip CalculatorCompute a tip, total payment and an equal per-person share. Specify whether the entered bill is your chosen pre-tax or post-tax tipping base.CalculateBill Split CalculatorSplit a bill equally after adding tax and tip, both calculated on the entered base bill. Compare the total with the actual restaurant bill before paying.Calculate
Understand, then calculate
Make sense of the key numbers in Everyday payments
A percentage acts on a chosen base. A discount reduces the original price before a subsequent tax is added; a tip can instead use a pre-tax or post-tax bill according to the intended convention. State the base explicitly before comparing two results. Reducing a price by 20% and then increasing it by 20% does not restore the original because the second operation uses a different base. Currency labels do not choose jurisdictional tax rules, and a planning calculation should be compared with the actual bill.
Equal bill splitting divides a total by a positive whole-person count. The mathematical share may have more decimal places than cash allows, so individually rounded payments can differ from the rounded total. Allocate the residual deliberately rather than hiding it. Taxes and tips applied separately to the same base add their rates; a tax applied after a discount compounds on the discounted base. These are different equations even when the entered percentages are identical. Existing service charges should be checked separately to avoid adding the same charge twice.
What you can work out here
Identify the decision first, then open the calculator that answers it.
- Discount Calculator
- Calculate a discounted price, savings and tax applied after the discount. Enter a reduction percentage: a 20% discount means paying 80% of the original price.
- Tip Calculator
- Compute a tip, total payment and an equal per-person share. Specify whether the entered bill is your chosen pre-tax or post-tax tipping base.
- Bill Split Calculator
- Split a bill equally after adding tax and tip, both calculated on the entered base bill. Compare the total with the actual restaurant bill before paying.
- Verify the convention
- Check the units, scope and limits before comparing results.
Core terms in plain language
Understand the recurring inputs and results instead of reading only the final number.
- Percentage base
- The amount on which a discount, tax or tip percentage acts.
- Discounted subtotal
- The original price after a discount and before subsequent tax.
- Equal share
- The stated total divided by a positive whole-person count.
- Rounding residual
- The difference between independently rounded shares and the stated bill total.
Choose with context
Which calculator should you use?
Use these distinctions to move through the Everyday payments tools without comparing unrelated results.
- 01
Use discount for a reduced price and check whether tax is added to that reduced base.
- 02
Use tip to compare pre-tax and post-tax bases; check existing service charges first.
- 03
Use bill splitting for an equal total share, then allocate any remainder caused by cash rounding.
Check the stated input format, calculation convention and limits before using the result.
Common questions
What else to know about Everyday payments
These answers explain how to use the estimates and where their limits begin.
How do I choose a tool?
Use discount for a reduced price and check whether tax is added to that reduced base. Use tip to compare pre-tax and post-tax bases; check existing service charges first. Use bill splitting for an equal total share, then allocate any remainder caused by cash rounding.
Why can rounded shares differ from the total bill?
Each independently rounded share can lose or gain a fraction of a cent. Split the stated total first, then assign the remaining cents deliberately. Tax and tip bases and existing service charges should be checked against the bill.