Forward-mode view of how a payment you receive becomes the fee and the net amount: the percentage runs on the amount and the flat per-transaction fee is added once. In reverse mode the tool instead solves for the gross you must charge to net a target. The percentages are the ones you entered — PayPal’s pricing differs by country, transaction type, and currency and changes over time, so confirm the current figures on PayPal’s fee page.
Step
How it is charged
Amount
Transaction amount
Payment received
100.00
Percentage fee
3.49% of amount
3.49
Fixed fee
Flat per transaction
0.49
Total PayPal fee
Percentage + fixed
3.98
Net received
Amount − fee
96.02
Effective fee rate
Fee ÷ amount
3.98%
Estimates only — not financial, tax, or professional advice.
Calculated in your browser — the numbers you enter are never sent to our servers.
What it calculates: PayPal Fee, Net Amount Received, Amount to Charge, Effective Fee %.
Solving for the gross needs division, not addition
To receive $100 net at 2.9% plus $0.30, charging $102.90 is wrong — the fee is charged on the larger amount, so it comes to $3.28 and leaves $99.62. The correct gross is (target + fixed) divided by (1 − rate), which is $103.40.
The error is small on one invoice and compounds across hundreds. Reverse mode exists so the figure is right the first time, which matters most for freelancers and invoicing, where the net is the number that was actually agreed.
Surcharging rules differ by country and by agreement
Charging the buyer more to cover a payment fee is restricted or prohibited in several jurisdictions, and card network rules and PayPal’s own terms may forbid it regardless of local law. Building it into the price is generally acceptable where itemising it as a surcharge is not.
Reverse mode is still the right tool either way. Whether you show the fee or absorb it into the headline price, you need to know the gross that leaves the agreed amount in the account.
The percentage depends on the product, the country and the volume
Rates differ between goods and services payments, checkout integrations, invoicing, micropayments and charity accounts, and they differ again by country. High-volume merchants can negotiate lower percentages.
Cross-border payments add a percentage and currency conversion adds a further spread on top of the market rate, which is a cost that never appears as a line item. Take the rate from a recent transaction detail rather than a published headline.
The money goes back; the fee often does not
PayPal returns the full amount to the buyer on a refund, but the fixed portion of the original fee is commonly retained, and in some markets the percentage is too. A refunded order can therefore cost more than a sale that never happened.
That asymmetry is worth pricing into categories with high return rates, and it is a reason to resolve a dispute by refunding early rather than letting it become a formal case, where a separate and larger dispute fee applies.
Frequently Asked Questions
How do I calculate a PayPal fee?
Multiply the amount by PayPal’s percentage and add the fixed fee. For example, 3.49% of 100 plus 0.49 is 3.98. This calculator does that in forward mode and also reverses it to find the gross you must charge. Verify the rate on PayPal.
Why can’t I just add the percentage to my target?
If you add only the percentage of the target, the fee on the larger gross amount will leave you short. The reverse formula accounts for the fee applying to the whole grossed-up amount, so you net exactly the target.
Does the fixed fee change the effective rate a lot?
On small payments, yes. The fixed fee is constant, so it represents a bigger share of a small amount, raising the effective rate noticeably.
Does PayPal return fees on refunds?
Policies have varied over time and the fixed portion may not be returned. This calculator estimates fees on a payment and does not model refunds.
Can I use this for invoices?
Yes. Use reverse mode to set an invoice amount that nets what you need after fees, then confirm the live PayPal rate for your account and country.
Sources & References
Figures on this page are checked against primary, authoritative sources. Links open in a new tab.
Results are estimates for planning and analysis based on the figures you enter. They are not accounting, tax, or financial advice — verify with your own records and a qualified professional before making decisions.
Built and maintained by Jay Sudha, who runs a rice mill and trading business in Kashipur, India, and works with pricing, margins, working capital and bank credit as part of it.
Published the calculator with its formula, worked example, assumptions, limitations and a bespoke guide, and added an automated formula test suite covering it.
Tested both directions and round-tripped them: the gross solved from a target net, fed back forward, must return that same net.
Tested that adding the fee percentage to a target net understates the required gross, which is the error reverse mode exists to prevent.
Frequently Asked Questions now show on the page: 5 answers, checked in a page-by-page audit.
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