Reverse Tip Percentage Calculator
Enter bill + total paid to reveal the exact tip percentage. Verify receipts, spot hidden service charges, and audit gratuity in seconds.
Statutory Gratuity Rule: Under FLSA 29 U.S.C. § 203(m) and 29 CFR Part 531, tips are the absolute property of employees; employers and managers are strictly barred from retaining any portion of tip pools. Standard U.S. dining gratuity benchmarks range from 15% (standard service) to 18%–20% (good service) and 22%+ (exceptional service), calculated directly on the pre-tax subtotal.
Reverse Tip Calculator
Find out what tip percentage you actually left based on the bill and total paid
Enter the pre-tax, pre-tip bill amount (the subtotal before any gratuity)
Enter the full amount you left on the table or charged to your card
Your Tip Breakdown
How the math works
Your tip is simply the difference between what you paid and what the bill was:
To turn that into a percentage, divide the tip by the bill and multiply by 100:
Note: This calculation assumes no tax was added on top. If your bill already includes tax, enter the post-tax total and the tool will show your effective tip percentage.
About This Calculator
What it does
Input your bill and the total you paid to calculate the exact tip percentage. Useful for verifying receipts and catching mandatory service charges. Example: a $60 bill with a $72 total means a 20% tip—but a $75 total would reveal a 25% charge worth questioning.
Data sources
- National Restaurant Association
- U.S. Bureau of Labor Statistics
- Internal Revenue Service
- State Revenue Departments
Last updated: 2026 · Fact-checked against primary industry sources
Frequently asked questions
How do I calculate tip percentage backwards?
(Total paid − Bill) ÷ Bill × 100 = tip percent. A $70 total on a $60 bill is a 16.7% tip.
How do I verify a service charge?
Compare the calculated percentage to the expected 15–20%. A much higher figure is likely a mandatory service charge, not a voluntary tip.
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