Stripe Blended Rate Calculator: Finding Your True Payment Processing Cost
Stripe's advertised rate is 2.9% + $0.30. Your actual blended rate — what you really pay across all transactions — is almost certainly higher. Here's the formula, the factors that inflate it, and how to calculate yours.
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.
The formula
Example
vs. advertised 2.9% — this business is paying 10% more than the stated rate.
How to calculate it manually
- 1
Export your Stripe Balance CSV (Itemized)
Go to Dashboard → Reporting → Reports → Balance summary → Export → choose "Itemized". See our full export guide for details.
- 2
Sum the "amount" column for charge rows
Filter the CSV where the "type" column equals "charge". Sum the "amount" column. This is your total charge volume (in cents — divide by 100 for dollars).
- 3
Sum the "fee" column for those same rows
Sum the "fee" column for charge rows only. This is total fees paid on charges (also in cents).
- 4
Apply the formula
(Total fees / Total charge volume) × 100 = your blended rate as a percentage.
What inflates your blended rate
Multiple factors push your real rate above the advertised 2.9%:
International cards
+1.5% per intl. chargeCards issued outside your Stripe account's country add 1.5% per transaction.
Fixed fee on small transactions
+3–30% on small chargesThe $0.30 fixed fee represents 6% of a $5 charge — pushing effective rate above 9%.
Currency conversion
+1–2% per conversionWhen Stripe converts between currencies, it adds 1–2% to the transaction.
Refunds (fee not returned)
+0.1–0.5% blendedStripe keeps the processing fee when you issue a refund, increasing your net cost.
Dispute fees
VariableEach dispute costs $15 regardless of outcome. A 0.5% dispute rate adds ~$0.75/transaction.
What's a healthy blended rate?
There's no universal benchmark — it depends on your customer mix and transaction sizes:
- US-only SaaS, domestic cards, avg transaction $50+2.9–3.1%
- Mixed US/international, SaaS or subscriptions3.2–3.8%
- Majority international customers4.0–5.0%+
- Low average transaction value (under $20)4.0–6.0%+
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.
Calculate your real blended rate
Upload your Stripe Balance CSV and get your blended rate, month-by-month breakdown, and per-transaction anomaly analysis in about 30 seconds. No account needed.