PayPal & Stripe Fee Calculator

Reading the fee screen before you raise your price

Rule of thumb: once payment fees eat more than about 4% of an invoice, they belong in your pricing decision, not your expense surprise. On a $2,000 invoice at 2.9% plus $0.30, the fee is $58.30, leaving $1,941.70. On a $49 product the same structure takes $1.72, or 3.5%, while on a $9 product it takes $0.56, or 6.2%. 300 small sales at $9 a month lose about $160 in fees before any larger order is counted.

That asymmetry is a pricing lever. Raising a small-ticket item by a dollar does more for percentage profit than a two-dollar raise on a big one, because the fixed fee shrinks as the basket grows. Before a universal increase, run the fee math at your smallest and largest common baskets; the right move is usually to raise the low end and leave the high end alone.

A worked screen: enter 2,000 at 2.9 plus 0.30 and the net reads 1,941.70, a fee of 58.30. Change only the percentage to 3.4 and the net drops to 1,930.00. At a 6 dollar basket the two structures are nearly identical, about 5.60 either way.

Surcharges carry legal cargo: card networks require disclosure and a few jurisdictions ban them outright, so absorbing the fee in a higher posted price is often cheaper. This calculator is how you confirm the posted price still clears your margin at the basket you actually sell.

Why the fixed fee dominates on small baskets

On a $4.00 sale with a 2.9% plus 30 cents fee, the percentage part is $0.12 and the fixed part is $0.30, so over 70% of the total fee is the flat component. On a $400.00 wholesale order the same structure flips: the percentage piece is $11.60 and the flat piece is rounding error. The implication is that small-item sellers should shop processors by the fixed fee and large-ticket sellers by the basis points.

Do the comparison on your actual average basket, not on headline percentages. A processor with a 3.4% rate and no fixed fee can beat one with 2.9% plus $0.30 on a $6 average order, yet lose badly on a $90 average. Enter both structures in this calculator at your real mean basket size and compare the net number you end up with. If your basket skews bimodal, run a typical small order and a typical large order separately and weight them by volume before you switch processors.

Watch the recurring cases too. A subscription billing 12 dollars monthly pays 0.30 fixed plus 0.35 percentage, about 5.4% of the transaction. Over a year the flat component alone is 3.60 of pure fee against a 144 revenue line, which is why small-subscription merchants chase processors with zero fixed fees even when the percentage is a full point higher. Run your smallest recurring ticket through the calculator once with each structure and carry the difference over twelve months before you commit.

Minimum fees and the tax you forgot was in the base

Some processors impose a per-transaction minimum: if the percentage fee would fall below a floor such as 30 cents, they charge the floor anyway. This calculator does not assume a floor exists, so enter a percentage high enough to represent it on your average ticket. A $3.75 order with a 30-cent minimum is paying an effective 8% rate, which is why micro-transaction businesses aggregate orders or set minimum cart sizes.

The second overlooked input is sales tax inside the payment base. Most processors charge on the gross amount, tax included, while your revenue is the pre-tax portion. On a $25 sale with 8.25% tax, the fee applies to $27.06, not $25.00, so your effective rate on real revenue is roughly 8% higher than the sticker rate. The calculator matches whatever amount you enter; type the gross if that is what the processor sees, then judge your net margin against the pre-tax revenue, not against the gross.

Enter the whole monthly volume rather than a single order when the patterns are dense: a month of forty-odd transactions averaging 12 dollars behaves like a portfolio, and the fixed fees alone run 13 dollars. If your processor offers interchange-plus pricing, the sensible test is the same screen run twice, once on blended-list rates and once on the interchange-plus estimate your rep quoted, since savings claims on that model routinely shrink on real small-ticket mixes.

Direct cards, wallets, and marketplaces on the same $100 sale

The same $100 sale has three very different fee outcomes depending on the channel, illustrated with this calculator's editable presets. A Stripe-style card payment near 2.9% plus $0.30 costs about $3.20. A PayPal-style wallet near 3.49% plus $0.49 costs about $3.98. A marketplace that charges roughly 6.5% plus a fixed listing fee can take more than $6.70 before any shipping income is counted. The product does not change; the channel does.

Treat each channel as its own margin line and compute break-even prices per channel rather than averaging. A product that nets 40% after direct card fees may net 25% after marketplace fees and still be worth listing, because marketplace traffic substitutes for money you would otherwise spend acquiring customers. There is a pretend-average trap here too: a blended fee rate drawn across channels tells you nothing about whether any single channel is profitable, so enter each channel's rates separately and compare each channel's net on its own.

A retention note that belongs here: many shoppers abandon a cart when the payment step adds an unexpected fee, so the fee you pass through costs revenue on top of the fee itself. If you surcharge, most card networks require you to disclose it earlier in checkout and in some jurisdictions forbid it entirely. The cheaper option is often to post a slightly higher product price and absorb the fee, then verify on this calculator that the posted price still clears your margin floor at your average basket.