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Published: 2026-07-06Last updated: 2026-08-19By Davide Coronese

Shared Expenses & Bill Splitter

Easily distribute restaurant checks, shared flats, and trip splits with tips included.

Local calculation in your browserno data sent — formula in lib/calculators/*.ts + automated tests
Group Payment FormulaVerified source
Per Person Share = (Subtotal + (Subtotal × Tip %) + Tax) ÷ Total People

Compute the total tip, add the initial subtotal and any taxes, and divide the final sum by the count of active participants.

Split Bill Calculator

Splitting the bill with friends? Enter the total, tip, and number of people and you will see what each person pays. No awkward math at the table.

TL;DR

  • You add the tip to the subtotal and divide the total by the number of people
  • Group Payment Formula: Per Person Share = (Subtotal + (Subtotal × Tip %) + Tax) ÷ Total People
  • Example 1: Splitting a dinner among 4 friends with a 15% tip

How it works

You add the tip to the subtotal and divide the total by the number of people. Choose whether the tip applies before or after tax.

The math

Find the tip as a percent of the subtotal, add tax, then divide by the number of people.

Compute the total tip, add the initial subtotal and any taxes, and divide the final sum by the count of active participants.

Examples

Example 1: Splitting a dinner among 4 friends with a 15% tip

  1. Bill Subtotal: $100.00, Tip: 15%, People: 4
  2. Calculate tip amount: $100.00 × 0.15 = $15.00
  3. Grand Total: $100.00 + $15.00 = $115.00
  4. Divide by 4: $115.00 ÷ 4 = $28.75 per person

Example 2: Bill with tax and custom tip splits

  1. Subtotal: $80.00, Tax: $8.00, Tip Rate: 20%, Diners: 2
  2. Tip Amount: $80.00 × 0.20 = $16.00
  3. Grand Total: $80.00 + $8.00 + $16.00 = $104.00
  4. Divide by 2: $104.00 ÷ 2 = $52.00 per person

When to use it

Restaurant and Bar Gatherings

Instantly split the check at the table to avoid awkward arithmetic delays and make payment seamless.

Shared Housing and Utility Bills

Divide monthly internet, electricity, and heating costs among flatmates.

Travel Expenses and Road Trips

Calculate hotel and fuel costs to distribute travel budgets fairly among vacation companions.

⚠ Common mistakes

  • Double-Tipping on Tax: Calculating the tip on the post-tax bill instead of the pre-tax subtotal, resulting in an accidentally higher gratuity.
  • Rounding Too Early: Rounding decimal shares too early in the steps, causing the sum of individual payments to mismatch the original bill total.

FAQ (6)

Is tip calculated before or after tax?

Traditionally, tips should be calculated on the pre-tax subtotal of the bill.

What is a standard tipping percentage?

Tipping guidelines vary globally: 15% to 20% is typical in North America, while service fees are often built-in in Europe.

If I type my salary or prices here, do you store them?

No — and that's deliberate. Everything runs locally in your browser, nothing leaves your device. We don't see your net salary, your margins, or the VAT numbers you test. For a finance tool that matters: you can run a quick check on a payslip or an invoice while on public Wi-Fi and close the tab knowing no trace is kept server-side.

Can I use it on the train without signal to check an invoice?

Yes. Load the page once, then it works offline. VAT, discount and mortgage math are all pure JavaScript — no API call. I often test it in airplane mode: open the mortgage page, type 250,000 at 4.5% for 25 years, you get the schedule instantly, even in a tunnel.

Can I file taxes with these results?

Use it as a fast sanity check, not as the final filing. Formulas are standard (e.g. Net = Gross / 1+VAT) and verified against official sources listed at the bottom, but rates and thresholds change — Italy's 22% vs Germany's 19%, or IRPEF brackets. For the actual declaration, double-check with your accountant or Agenzia delle Entrate / HMRC / IRS.

How do I send a calculation to my accountant?

Hit 'Share Link' under the results. It encodes the inputs in the URL — e.g. ?price=1200&vat=22 — so your accountant opens the exact same view, no screenshot needed. You can also copy the result with one tap and paste it into an email.

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