Best flat-rate payment processors

Flat-rate pricing charges one predictable percentage (plus a fixed fee) on every sale, with no monthly minimums, which makes it the simplest model for new and low-volume businesses. These processors use flat-rate pricing.

28 processors

Airwallex logo
No reviews

Global payments and business accounts with FX at 0.5 to 1 percent over interbank and free local payouts to 120+ countries.

2.80% + $0.30 US

online rate

$0 US Explore plan

monthly fee

Varies

payout

Cross-border sellers
Multi-currency treasury
Global payouts
+1
PayJunction logo
No reviews

US merchant services provider offering paperless card and ACH processing on month-to-month terms with no cancellation fee.

From 1.49% + $0.15

online rate

None above $10k volume

monthly fee

2-day

payout

Healthcare practices
Auto repair shops
Professional services
Checkout.com logo
No reviews

Enterprise acquirer with direct licenses across the UK, EEA, US, APAC and MENAP, custom Interchange++ pricing and same-day settlement.

Custom quote

online rate

None

monthly fee

Varies

payout

Enterprise ecommerce
International sellers
Marketplaces
+1
Midtrans logo
No reviews

Indonesian payment gateway owned by GoTo Financial, with a published rate for every method: GoPay, QRIS, virtual accounts, cards and convenience stores.

2.9% + IDR 2,000

online rate

IDR 0 per month

monthly fee

T+3

payout

Indonesian ecommerce
Local payment methods
Small business
+1
Metronome logo
No reviews

Usage-based billing infrastructure for AI and cloud companies, now owned by Stripe. It meters events and issues invoices through your own payment provider.

0.8% of billings

online rate

None on Starter

monthly fee

Varies

payout

AI and LLM billing
Cloud infrastructure
Enterprise contracts
+1
NOWPayments logo
No reviews

NOWPayments is a non-custodial crypto payment gateway that settles 350-plus cryptocurrencies straight to your own wallet for a 0.5% service fee.

0.5% service fee

online rate

$0

monthly fee

Instant

payout

Crypto-native merchants
Online stores
Donations
Easy Pay Direct logo
No reviews

Austin merchant account provider that splits one merchant's volume across several MIDs, built for high-risk and direct-response sellers.

2.69% + $0.36

online rate

Typically $25

monthly fee

Varies

payout

High-risk merchants
Direct response marketers
Coaching and info products
+1
CSG Forte logo
No reviews

ACH-first payment processor owned by CSG, built for utility, government, healthcare and property management billing rather than card-led retail.

Reported 2.9% + $0.31

online rate

Reported $2.50 gateway

monthly fee

Varies

payout

ACH and eCheck billing
Government and utilities
Property management
+1
Easebuzz logo
No reviews

RBI-licensed Indian payment aggregator for online, offline and cross-border collections, with payouts and reconciliation on the same platform.

Around 1.5% average

online rate

INR 0 per month

monthly fee

Next day

payout

Indian businesses
Education fee collection
Subscriptions
+1
Polar logo
No reviews

Merchant of record for developers that sells your product under its own name, handles sales tax and VAT liability, and pays you out through Stripe Connect.

5% + $0.50 on Starter

online rate

$0 to $400 by plan

monthly fee

Varies

payout

Indie developers
Digital products
AI and SaaS startups
+1
BitPay logo
No reviews

Longest-running major crypto payment processor: accept 100+ cryptocurrencies, settle in fiat daily, with no chargebacks.

No card payments

online rate

None

monthly fee

2-day

payout

Crypto checkout
International sales
High-ticket goods
+1
BlueSnap logo
No reviews

Global payment orchestration with local acquiring in 50 countries, published regional fee schedules and intelligent routing with failover.

2.9% + $0.30

online rate

$0 above $5,000 sales

monthly fee

2-day

payout

Multi-region ecommerce
B2B and AR automation
Platforms and marketplaces
+1

Frequently asked questions

Who should use flat-rate pricing?
Flat-rate suits new stores, low or unpredictable volume, and anyone who values simple, predictable costs over squeezing out the lowest possible rate. As volume grows, interchange-plus often becomes cheaper.

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