The Hidden Cost of Getting Paid
Stripe's headline rate — 2.9% + 30¢ — looks like a complete number. It isn't. That figure is a blended rate, meaning Stripe absorbs the variance between a low-cost domestic debit transaction and a high-cost international credit card payment, then charges you one average number regardless of which type actually occurred. On a purely domestic debit transaction, you're overpaying relative to the true interchange fee underneath it. On an international card, you're often underpaying relative to what Stripe actually absorbs — until the forex conversion spread quietly closes that gap in Stripe's favor anyway.
This is the core problem a payment gateway charges calculator exists to solve: showing you the real number that lands in your account, not the marketing number printed on the pricing page.
The Master Gateway Comparison Matrix
| Platform | Domestic MDR | International MDR | Fixed Fee | Forex Markup |
|---|---|---|---|---|
| Stripe | ~2.9% | ~3.9%–4.4% | $0.30 | ~1% (itemized separately) |
| PayPal | ~3.49% | ~4.99% | $0.49 | ~3%–4% (hidden in exchange rate) |
| Razorpay | ~2.0% | Custom / Enterprise | ₹0–₹3 | N/A (INR-focused) |
| Wise | N/A — not a checkout gateway | 0.33%–0.43% FX only | One-time account fee | Mid-market rate, no markup |
Wise isn't structured like the others — it's not a checkout gateway, it's a way to receive international payments as if you had a local bank account, bypassing gateway MDR entirely for direct bank transfers.
Deconstructing the Fees: Where Your Money Actually Goes
Every card transaction fee is really a stack of separate charges, not one number: interchange fees paid to the card-issuing bank (the largest component, non-negotiable by the gateway), assessment fees paid to the card network itself, gateway/processor fees — the actual markup your provider adds — and additional processor markups for premium features like instant settlement or currency conversion.
In the overwhelming majority of setups, the merchant pays — the fee is deducted from the amount received, not added to what the customer is charged. A convenience fee is different: an additional charge the merchant adds on top of the price, explicitly passed to the customer, and whether that's legal depends on jurisdiction and card network rules.
The "Zero Fee" Gateway Myth
Pure zero-fee processing doesn't exist at scale. Someone always pays for interchange, network assessment, and fraud infrastructure. When a platform advertises "zero fees," the cost typically resurfaces as delayed settlement (funds held 5–7+ days instead of 1–2), steep withdrawal fees, or a baked-in forex spread 2–4% worse than the mid-market rate.
If a platform claims zero fees and offers international payments, check the exchange rate against the actual mid-market rate before assuming you're getting a good deal. The absence of a fee line item is not the same as the absence of a cost.
India-Specific Gateway Breakdown
Razorpay charges a standard 2% domestic MDR with zero annual maintenance charges — for most merchants under roughly ₹1.6–1.7 lakh/month GMV, this makes it cheaper in absolute terms than lower-headline-rate competitors that charge AMC. Under RBI's zero-MDR mandate, standard bank-to-bank UPI and RuPay debit transactions up to ₹2,000 carry no merchant discount rate. Above ₹2,000, or for RuPay credit payments routed through UPI, standard MDR applies.
Payment gateway services fall under SAC code 997159 for GST purposes. GST is charged on the gateway's fee itself, not the transaction value — meaning a 2% MDR effectively becomes closer to 2.36% once 18% GST is applied to the fee component.
Comparing the Big Two: Stripe vs. PayPal
Stripe is developer-first and its blended rate is generally more transparent about international surcharges being itemized separately. PayPal carries stronger buyer-side trust and built-in dispute resolution, but its international MDR and currency conversion spread run consistently higher — often the least visible cost in a cross-border PayPal transaction is the forex spread, not the stated percentage fee. Neither is universally cheaper; the right choice depends on whether buyer trust or lower international fees matters more for your business.
Cross-Border Billing & The Wise Advantage
International payment gateway fees compound in a way domestic fees don't: base MDR, plus a cross-border surcharge, plus a currency conversion spread — three separate charges stacked on a single transaction.
Wise isn't a payment gateway competing with Stripe or PayPal on checkout infrastructure. It solves a different problem: receiving international payments as if you had a local bank account in the client's country, which bypasses the gateway MDR and forex markup stack entirely for direct bank transfers. A Wise Business account gives you local account details in 20+ currencies — a real US routing number, a real UK sort code, a real EUR IBAN. When currency conversion genuinely is needed, Wise applies the mid-market exchange rate with a transparent, published markup — typically 0.33%–0.43%, a fraction of the 3%–4% spread commonly built into PayPal's exchange rates.
On a $2,000 international invoice, a 3.5% hidden PayPal forex spread costs roughly $70. The same transfer through Wise at a ~0.4% markup costs closer to $8 — a difference that compounds fast across a year of client invoices.
Disclosure: Links to Wise on this page are referral links. If you sign up through one, GetInvoicePDF.com may earn a referral commission at no additional cost to you. Wise is recommended here based on its published fee structure and mid-market FX rate, independent of that arrangement.
Comprehensive FAQ
What is MDR and how is it different from a convenience fee?
MDR (Merchant Discount Rate) is the percentage the payment gateway deducts from every transaction, paid by the merchant. A convenience fee is an additional charge the merchant adds on top of the price, passed to the customer — and it's separately regulated, not automatically legal everywhere.
Is there a truly zero-fee payment gateway?
No credible option processes payments at genuinely zero cost. "Zero fee" marketing typically shifts the cost into delayed settlement, withdrawal fees, or a wider forex spread — the cost exists, it's just relocated off the fee line item.
How do Stripe vs PayPal fees compare for a small business?
For domestic transactions, the two are close — Stripe's ~2.9% + $0.30 versus PayPal's ~2.99%–3.49% + $0.49 puts PayPal's fixed fee noticeably higher on small transactions. For cross-border sales, Stripe's international surcharge is typically itemized more transparently, while PayPal's forex spread is often the larger, less visible cost of the two.
Do payment gateway charges attract GST in India?
Yes. GST (currently 18%) applies to the gateway's fee itself, classified under SAC code 997159, not to the underlying transaction value.
Can I avoid payment gateway charges entirely by using bank transfers?
Domestic bank transfers within the same country often carry no fee or a small flat fee. For international transfers, direct bank wires typically carry the worst forex spread of any option, making a service like Wise, which uses local bank rails and the mid-market rate, a meaningfully cheaper alternative to a traditional wire.
About the Author
Author & Economics Researcher — Economics Honors, Bhattadev University · GetInvoicePDF.com
Santanu Sarma is an economics researcher specializing in public finance, econometric modeling, and financial technology. With an academic foundation in Economics from Bhattadev University, he architects high-precision accounting tools, tax estimators, and payment calculators for global freelancers at GetInvoicePDF.com.
Disclaimer: Rates shown are indicative, sourced from each provider's published pricing pages as of mid-2026, and simplified for comparison. Actual rates vary by account history, country, negotiated volume pricing, and card type — always confirm current pricing directly with each provider before making a decision. This page contains a referral link to Wise (disclosed above); nothing here constitutes financial advice.