Stripe Blended Rate: Formula and CSV Benchmarks

What is a blended rate?

Your blended rate (also called effective rate) is the total fees you paid divided by your total charge volume over a period. It's a single number that captures everything — percentage fees, fixed fees, international surcharges, currency conversion, and any other charges.

Unlike the advertised rate, which applies to one idealized transaction type, your blended rate reflects your actual mix of customers, card types, geographies, and transaction sizes.

Stripe blended rate is the real percentage of processed volume paid in Stripe fees: total fees divided by total charge volume. It is usually more useful than the advertised card rate when you want to understand an actual month of payments.

The formula

vs. advertised 2.9% — this business is paying 10% more than the stated rate.

How to calculate it manually

What inflates your blended rate

Multiple factors push your real rate above the advertised 2.9%:

What's a healthy blended rate?

There's no universal benchmark — it depends on your customer mix and transaction sizes:

If your rate is above the expected range for your profile, something specific is driving it — usually international cards or small transactions. Both are identifiable from your Balance CSV.

Month-by-month tracking matters

Your blended rate isn't static. A spike in one month usually has a specific cause: a marketing campaign that drove international traffic, a product launch with small intro-priced transactions, or a batch of refunds.

Tracking month-by-month lets you diagnose these spikes and respond — either by adjusting payment methods for affected customers, or at minimum understanding why your fees increased so you're not surprised at tax time.