Best Payment Gateway for Ecommerce Businesses in 2027: Fees Compared

Choosing a payment gateway comes down to four things: what it costs per sale, where you can sell, how well it fits your platform, and how it handles disputes and fraud. This 2027 guide compares the main options for ecommerce businesses, shows how to calculate your real cost per order, and covers how agencies and fintech vendors can sell into this decision.

Gateway, processor, and merchant account: the short version

These terms get mixed up, so define them first.

• Payment gateway: the layer that securely captures card details at checkout and sends them for authorization.
• Payment processor: the party that moves the money between the banks.
• Merchant account: the account where funds settle.

Providers like Stripe, PayPal and Square bundle all three, which is why most small and mid-size stores treat them as one choice. Larger merchants sometimes separate them to negotiate better rates.

The main options compared

Rates below are US list prices reported in 2026 comparisons. They change, and your actual rate depends on volume, card mix and contract, so confirm on each provider's pricing page.

Provider	Standard online rate	Notes
Stripe	2.9% + 30 cents	+1.5% for international cards, +1% where currency conversion applies, $15 per dispute
PayPal (checkout)	3.49% + 49 cents	Higher rate, but strong buyer recognition
Square	3.3% + 30 cents (free tier), 2.9% + 30 cents (paid tiers)	Best fit when you also sell in person
Adyen	$0.13 per transaction + interchange and scheme fees + 0.60% markup on Visa and Mastercard	Interchange-plus pricing, minimum monthly invoice applies

Sources: a Dodo Payments comparison for Stripe, PayPal and Square, and a Chargeflow comparison for Stripe and Adyen. Both vendors have a commercial interest, so verify against official pricing.

Stripe

Developer-friendly, self-serve onboarding, flexible checkout and billing. Pricing is blended: one flat rate covers interchange, scheme fees and processing. Good for most online stores and subscription businesses. Custom pricing is available at higher volumes.

PayPal

Many shoppers trust it and want to pay with it, which can lift conversion on first-time purchases. The fixed fee weighs more on small orders, so run the math on your average order value. Many stores offer PayPal alongside a card gateway instead of choosing one.

Square

Strongest for merchants who sell both online and in person, since reporting and inventory sit in one place. Less natural as a cross-border online stack.

Adyen

Built for larger merchants that need unified online and in-store acquiring across multiple markets. Interchange-plus pricing can be cheaper at high volume with a low-cost card mix, but it needs real volume and a proper comparison against your actual transactions.

What your platform decides for you

Your store platform shapes the choice. On Shopify, the pricing page shows online card rates from 2.9% + 30 cents on Basic to 2.25% + 30 cents on Plus when you use Shopify Payments. If you use an outside gateway, Shopify adds a third-party transaction fee of 2% on Basic, 1% on Grow, 0.6% on Advanced and 0.2% on Plus. That extra layer can make an external gateway more expensive than it looks, so compare the combined cost. For a wider look at platforms, read our guide to the best ecommerce software.

How to calculate your real cost per order

Headline rates hide the real number. Use this method:

1. Take your average order value and monthly order count.
2. Apply the percentage and fixed fee: for a $60 order at 2.9% + 30 cents, that is $1.74 + $0.30 = $2.04.
3. Add surcharges for international cards, currency conversion and chargebacks.
4. Add platform transaction fees if you use a third-party gateway.
5. Divide total fees by revenue for your effective rate.

Do this for two or three providers using your real data. A fixed fee matters more on low-value baskets. A percentage matters more on high-value ones.

Costs people forget

• Dispute fees. Stripe lists $15 per dispute, and other processors, Adyen included, publish their own chargeback fees, so check each fee schedule.
• Currency conversion. Selling in multiple currencies adds a margin.
• Payout timing. Slower settlement ties up cash.
• Monthly minimums and add-ons. Fraud tools, billing and tax modules can carry separate charges.

Security, fraud and disputes

Whichever gateway you choose, confirm it supports tokenization, 3D Secure where relevant, and clear dispute tools. Chargeback rates affect your standing with the processor, so look at what evidence submission and fraud screening each option provides. Our guide to ecommerce payment security goes deeper, and the shopping cart guide covers checkout design that reduces abandonment.

How to choose

• Early-stage store, single market: Stripe or Shopify Payments, plus PayPal as an extra button.
• Omnichannel retail: Square or a platform's native option.
• Global or high volume: get quotes from several providers, including Adyen, and compare on your own transaction data.
• Subscriptions or marketplaces: prioritize billing and payout features over the lowest rate.

Mistakes that inflate payment costs

• Choosing a gateway before knowing your order profile. A 30 cent fixed fee on a $15 basket is a 2% tax on top of the percentage.
• Ignoring international buyers. If a meaningful share of your customers pay with foreign cards, the surcharges can change which provider is cheapest.
• Skipping the contract details. Look for minimum monthly fees, early termination terms, reserve policies and payout holds, especially for new or high-risk merchants.
• Never revisiting the rate. Once your volume grows, ask for a custom quote or move to interchange-plus pricing. Review the setup at least once a year, and again before peak season.

Whichever provider you pick, test the full checkout on mobile before launch, since many shoppers pay from a phone. Confirm that saved cards, wallets and refunds work end to end, and that failed payments trigger a clear message and a recovery email. A gateway that is cheap but declines good customers costs more than one with a slightly higher rate, so track your authorization rate after launch.

The GTM angle

Payments are a fee line every merchant sees monthly, which makes them an unusually good outbound topic. If you sell payment optimization, fraud tools, checkout apps, chargeback management or bookkeeping to ecommerce brands, build campaigns around concrete, checkable triggers.

• Segment by order profile. Low-AOV stores care about fixed fees. High-AOV stores care about percentage and fraud. International sellers care about conversion fees.
• Trigger on change. New markets, new platform plans, a visible gateway switch or a spike in hiring for finance roles all indicate a fresh look at costs.
• Offer a calculation, not a call. "Send us last month's processing statement and we will show your effective rate" is a low-friction offer that earns replies.
• Be careful with claims. Quote public list prices only, cite the source, and avoid guessing a prospect's actual rate.

Estimate the pipeline value before you launch with the cold email ROI calculator, and browse vetted vendors in our directory to see how competitors position.

Frequently Asked Questions

What is the best payment gateway for ecommerce?

There is no single best one. Stripe suits most online stores, PayPal helps conversion with shoppers who prefer it, Square fits omnichannel, and Adyen fits large multi-market merchants.

What are typical payment gateway fees?

Stripe's US list price is 2.9% + 30 cents per domestic online card payment. Other providers differ, and international cards, currency conversion and disputes add extra charges.

Should I offer more than one gateway?

Often yes. A card gateway plus PayPal is a common setup, because some shoppers prefer to pay with PayPal. Check platform fees first, since third-party gateways can add costs.

Does my store platform limit my gateway choice?

It can. Some platforms charge extra when you use an outside gateway, as Shopify does with its third-party transaction fee. Compare combined costs.

How do I lower my payment costs?

Negotiate once you have volume, move to interchange-plus pricing if it suits your card mix, reduce chargebacks, and review international and currency fees.

Takeaways

• Compare effective cost per order, not headline rates.
• Fixed fees hurt low-value baskets, percentages hurt high-value ones.
• Check platform fees on top of gateway fees.
• Payments are a strong outbound trigger because the cost is visible and recurring.
• Need pipeline from ecommerce buyers? See Cruxfinder's cold outbound service and the free GTM calculators.