What this calculator does
Payment processors charge a percentage plus a fixed amount per transaction, which sounds small until you multiply it by a month of orders. This calculator shows the fee on a single order, the amount you actually receive, the effective rate once the fixed fee is included, and what the arrangement costs you monthly and yearly.
How to use it
- Enter the order value charged to the customer.
- Enter the percentage fee from your provider's pricing page.
- Enter the fixed fee charged per transaction.
- Enter your monthly order count to see the totals that matter at the business level.
- Compare the effective rate against the headline rate — on small orders the difference is significant.
The formula, explained
The effective rate is the honest number. A provider advertising 2.9% plus 30 cents charges an effective 3.5% on a 50 order, 4.9% on a 20 order and 5.9% on a 10 one. The fixed component is what makes low-ticket ecommerce so much harder than it appears.
This is also why raising average order value improves margin twice over: the fixed fee is spread across more revenue, and your acquisition cost is spread across a larger order at the same time.
A worked example
An order of 49.99 with pricing of 2.9% plus 0.30.
The percentage part is 1.45 and the fixed part 0.30, so the fee is 1.75 and you receive 48.24. The effective rate is 3.5%. Across 400 orders a month that is 700 in fees, or 8,400 a year — enough that a half-percent difference in pricing is worth an afternoon of comparison once your volume is established.
| Order value | 49.99 |
|---|---|
| Percentage fee | 1.45 |
| Fixed fee | 0.30 |
| Total fee | 1.75 |
| Net received | 48.24 |
| Effective rate | 3.5% |
What a good result looks like
Effective rate, not headline rate, is what to compare. These bands are typical for online card payments.
| Range | What it means |
|---|---|
| Under 3% | Good. Usually a higher average order value doing the work. |
| 3% to 4% | Normal for standard online card processing. |
| 4% to 6% | High, often caused by low order values or cross-border cards. |
| Above 6% | Something is unusual — check for currency conversion or high-risk pricing. |
Common mistakes
- Comparing headline percentages only. The fixed fee and any monthly platform charge often matter more than the percentage, especially at low order values.
- Forgetting cross-border and currency fees. International cards and currency conversion typically add one to two percent on top of the standard rate.
- Ignoring refund fee policies. Some processors keep the fixed fee when you refund an order, which makes refunds cost slightly more than the calculator shows.
- Leaving fees out of margin calculations. Three to four percent of revenue is not a rounding error on a thirty percent margin — it is more than a tenth of your profit.
- Chasing a lower rate too early. At low volume the difference between providers is small. Reliability, dispute handling and checkout conversion matter far more.
Frequently asked questions
What are typical payment gateway fees?
Standard online card pricing sits around 2.5% to 3% plus a fixed fee of roughly 20 to 30 cents per transaction. Cross-border cards, currency conversion and higher-risk categories all add to that. Some platforms also charge an additional percentage if you use an external gateway rather than their own.
How can I reduce payment processing fees?
Raise average order value so the fixed fee is spread further, negotiate rates once your monthly volume is meaningful, keep chargebacks low to avoid penalty pricing, and process in your customer's currency where possible to avoid double conversion. Bundling is often the fastest lever.
Does the fee apply to shipping and tax?
Yes. Processors charge on the total amount captured, including shipping charges and any tax collected. That means you pay a fee on money you are only holding on behalf of a tax authority, which is worth factoring into your pricing.
Do I pay a fee on refunded orders?
It varies. Many providers return the percentage but keep the fixed fee; some keep both. Chargebacks are worse — you pay a separate dispute fee regardless of the outcome. The refund cost calculator will show you what that adds up to.
Should I offer multiple payment methods?
Generally yes. Wallets and buy-now-pay-later options often convert better than cards alone, even where their fees are slightly higher. A method that lifts conversion by five percent easily pays for a half-percent higher fee.
How this fits with your other numbers
Processing fees are a fixed tax on revenue that most store owners look at once during setup and never again. At a few hundred orders a month they are worth a proper review, both because the totals become material and because your negotiating position improves with volume.
The more useful insight is usually about order value rather than provider choice. Because part of the fee is fixed, low-ticket products carry a much higher effective rate, which is another argument for bundles and quantity breaks. Run the same order value through the bundle price calculator and you will often find that the fee saving alone justifies the effort.