FeeSum
payment / calculator

Percentage Fee Calculator

Calculate any percentage fee by amount, rate, fixed fee, and monthly transaction count.

Quick answers
Fee on $100 at 3%$3.00
Fee on $500 at 3%$15.00
Fee on $1,000 at 3%$30.00
Charge to receive $100$103.09

Use this percentage fee calculator when a quote, invoice tool, processor, marketplace, or platform lists a percentage-based fee and you need the dollar amount quickly.

Interactive estimatorLive fee model
Estimated primary fee
$0

A $100 amount with a 3% fee costs $3.00. Across 100 monthly transactions, that is about $300 in percentage fees.

Per item
$0
Monthly total
$0
Effective rate
0%
Assumptions
  • Defaults use simple percentage-only fee math.
  • Add a fixed fee if the quote includes one.
  • Use provider-specific pages when you need Stripe, Square, PayPal, or QuickBooks assumptions.

Formula:(amount x percentage fee) + fixed fee, multiplied by monthly transactions.

Last reviewed:2026-05-30

Sources: Stripe pricing, Square processing fees

When to use this

Calculate simple percentage fees for card payments, invoices, marketplace charges, platform fees, or surcharge planning.

What you get

A $100 amount with a 3% fee costs $3.00. Across 100 monthly transactions, that is about $300 in percentage fees.

Useful next step

Use the estimate to compare options, pressure-test pricing, or decide which fee model deserves a closer look.

Problems this helps with

  • Need quick percentage fee math without a spreadsheet
  • Need to compare common card-fee rates
  • Need monthly impact from a small percentage fee
  • Need a neutral calculator before choosing a provider

Example estimate

A $100 amount with a 3% fee costs $3.00. Across 100 monthly transactions, that is about $300 in percentage fees.

Percentage Fee Calculator examples

Sample calculations

2.9% fee

Amount
$100
Rate
2.9% + $0.00
Result
$2.90

Common for online card-fee estimates.

2.99% fee

Amount
$100
Rate
2.99% + $0.00
Result
$2.99

Matches exact-rate searches from payment quotes.

3.5% fee

Amount
$500
Rate
3.5% + $0.00
Result
$17.50

Useful for surcharge-style percentage checks.

Fee table

Rate$100 amount$500 amountBest matching page
2.5%$2.50$12.502.5% Credit Card Fee Calculator
2.9%$2.90$14.502.9% Credit Card Fee Calculator
2.99%$2.99$14.952.99% Credit Card Fee Calculator
3%$3.00$15.003% Credit Card Fee Calculator
3.5%$3.50$17.503.5% Credit Card Fee Calculator
Rate 2.5%
$100 amount $2.50
$500 amount $12.50
Best matching page 2.5% Credit Card Fee Calculator
Rate 2.9%
$100 amount $2.90
$500 amount $14.50
Best matching page 2.9% Credit Card Fee Calculator
Rate 2.99%
$100 amount $2.99
$500 amount $14.95
Best matching page 2.99% Credit Card Fee Calculator
Rate 3%
$100 amount $3.00
$500 amount $15.00
Best matching page 3% Credit Card Fee Calculator
Rate 3.5%
$100 amount $3.50
$500 amount $17.50
Best matching page 3.5% Credit Card Fee Calculator

This page handles broad percentage-fee math. Use exact-rate pages when the search intent names a specific percentage.

Compare credit card fee scenarios

Continue with a related tool or comparison that helps turn the estimate into a clearer decision.

Compare credit card fee scenarios

Related fee calculators

Credit Card Fee Calculator Calculate credit card processing fees by payment amount, percentage rate, fixed fee, monthly card volume, and exact card-fee rates like 2.99%, 3%, and 3.5%. 2.5% Credit Card Fee Calculator Calculate a 2.5% credit card fee instantly, including the fee on $100, the fee on $500, and the gross charge needed to receive $100 after the fee. 2.9% Credit Card Fee Calculator Calculate a 2.9% credit card fee instantly, including the fee on $100, the fee on $500, and the gross charge needed to receive $100 after the fee. 2.99% Credit Card Fee Calculator Calculate a 2.99% credit card fee instantly, including the fee on $100, the fee on $500, and the gross charge needed to receive $100 after the fee. 3% Credit Card Fee Calculator Calculate a 3% credit card fee instantly, including the fee on $100, the fee on $500, and the gross charge needed to receive $100 after the fee. 3% Processing Fee Calculator Calculate a 3% processing fee instantly, including the fee on $100, the surcharge-style fee on $500, and monthly cost across repeated payments. 3.5% Credit Card Fee Calculator Calculate a 3.5% credit card fee instantly, including the fee on $100, the fee on $500, and the gross charge needed to receive $100 after the fee. Convenience Fee Calculator Calculate a convenience fee by amount, percentage rate, fixed charge, and monthly payment count, including common 2.75% examples. Credit Card Surcharge Calculator Estimate the added card surcharge needed to cover processing fees, then compare absorb-fee, surcharge, and reverse-fee scenarios. Payment Fee Calculators Choose the right calculator for credit card fees, 3% processing fees, convenience fees, surcharges, reverse fee math, invoices, merchant quotes, payouts, and exact-rate card fees. Payment Fee Calculators Card processing, POS, merchant services, and no-fee payment comparisons.

FAQ

How do I calculate a percentage fee?

Multiply the amount by the percentage as a decimal. For example, a 3% fee on $100 is $100 x 0.03 = $3.00.

How do I add a fixed fee?

Calculate the percentage fee first, then add the fixed fee. For example, $100 at 2.9% + $0.30 equals $3.20.

Is this the same as a credit card fee calculator?

It overlaps, but this page is broader. The credit card fee calculator is better when the fee is specifically for card processing.

Can I use this for marketplace or platform fees?

Yes. Enter the platform percentage and fixed fee if applicable, then use monthly transactions to estimate total impact.