Payment Processing 101 · By Zach Schleien · · · 4 min read
What is TDR in Payment Processing? Understanding Transaction Fees
Learn what TDR means, how it affects each sale, and why the quoted percentage may not tell the whole story.
Part of our guide to Fees and processing costs. What each rate, dispute fee and payout charge actually costs you.
Your sales total and your bank deposit do not match. Processing fees may explain part of the gap, but your statement might describe them using unfamiliar terms, including TDR.
What is TDR in payment processing? It usually means Transaction Discount Rate, not Transaction Delivery Rate. The term describes the charge a payment provider applies when processing a transaction.
This guide explains how that charge works, how it relates to Merchant Discount Rate (MDR), and how to compare providers without mistaking a headline rate for your total cost.
The Simple Definition of TDR
TDR usually stands for Transaction Discount Rate. It is the fee a payment provider charges a merchant to process a payment, commonly quoted as a percentage of the transaction value.
You may also see MDR, or Merchant Discount Rate. Providers sometimes use these terms interchangeably, but their contracts may define what each charge includes differently. Do not assume either label covers every payment-related expense.
For card payments, the processing charge can cover issuing-bank costs, card-network fees, and the provider's own charges. Other payment methods have different cost structures.
TDR is a service charge, not a tax. Taxes on that service charge may appear separately, depending on the provider and local rules.
How TDR is Calculated
When your provider quotes a percentage-based TDR, the basic calculation is:
Transaction amount × quoted TDR percentage = percentage-based processing fee.
Then add any fixed transaction charge, applicable taxes on fees, and other charges listed in your agreement.
Card-processing costs commonly include:
- Interchange: Fees paid to the cardholder's issuing bank. These vary by factors such as card type and transaction details.
- Network fees: Charges associated with the card networks.
- Provider charges: The amount charged for processing, technology, and related services.
A blended rate bundles costs together. Interchange-plus pricing separates interchange from the provider's stated markup. Neither structure means every extra service is included.
For a published example, Stripe charges 2.9% + $0.30 per successful US domestic card charge. International cards add 1.5%, and currency conversion adds 1% when applicable.
When negotiating your processing rates, ask which charges the provider controls and request a comparison based on your actual payment mix.
TDR vs. Flat Fees: Why It Matters
A percentage fee grows with the size of the purchase. A fixed per-transaction fee stays the same regardless of the purchase amount. Many providers combine both.
| Fee type | How it works | Why it matters |
|---|---|---|
| Percentage-based fee | A share of the transaction value. | Usually has a larger dollar impact on expensive purchases. |
| Fixed transaction fee | A set amount for each transaction. | Takes a larger share of a small purchase. |
| Additional charges | Fees for services such as financing, currency conversion, or faster payouts. | Can change which provider is cheapest for your business. |
Be careful with the phrase flat-rate pricing. It can describe a standard percentage-plus-fixed-fee schedule, not just a fixed charge per sale.
If you sell inexpensive downloads or memberships, the fixed transaction charge deserves close attention. Our guide to processing for low average ticket sizes explains what to compare.
For a useful overall measure, divide your total payment-related fees by your processed sales volume for the same period. Keep the same costs in scope when comparing providers, including financing and payout fees if you use those services.
Commas (formerly FanBasis): An Alternative to Complex TDR Structures
For creators, coaches, and digital-service businesses, Processor Verdict recommends Commas (formerly FanBasis) as the first option to evaluate. Its appeal is combining checkout, funnels, courses, paid communities, webinars, and affiliate programs in one account, rather than choosing on the processing percentage alone.
For high-ticket offers, Commas lists 10 financing partners with financing amounts from $30 to $465,000. Credit Key covers the upper limit for business buyers, while Climb focuses on education. Financing applies to one-time purchases, not subscriptions, and availability depends on the partner and buyer eligibility.
Commas told us they will match or beat your current rate. Bring your current statement and request a written quote covering the features, financing, and payout methods you plan to use.
Commas does not publish pricing, and every processor's terms allow holds.
Explore Commas for your digital business if you want selling tools and payments together.
Whop is also worth comparing for lower-ticket digital products and paid communities. Its domestic card processing costs 2.7% + $0.30, with no monthly fee. Financed transactions cost 15%, so its card rate should not be used to estimate financing costs.
Whop is merchant of record for card-network rules and payment settlement. It is merchant of record for tax only when Whop Collects and Remits is enabled; tax and remittance costs 2% when tax is collected. Read our Whop vs. Stripe comparison to compare those responsibilities with a direct processing setup.
The right choice depends on your total costs and the tools you need, not whether the provider calls its processing charge TDR, MDR, or something else.
Frequently Asked Questions
Is TDR different from MDR?
TDR usually means Transaction Discount Rate, while MDR means Merchant Discount Rate. Both commonly describe merchant payment-processing charges. Providers may use them interchangeably, but check your agreement to see what the quoted fee includes.
What is a normal TDR rate?
There is no universal rate across countries, payment methods, and business types. As a specific US benchmark, Stripe charges 2.9% + $0.30 for successful domestic card charges. Compare rates for your actual payment mix rather than treating that benchmark as a global standard.
Does TDR include tax?
Not necessarily. A provider may quote processing fees before applicable taxes. Ask whether the quoted rate includes tax on the processing service, and keep that separate from sales tax or VAT collected on your customer purchases.
How can I reduce my TDR?
Ask for a pricing review using your current statements, sales volume, average purchase size, and payment mix. Compare the full cost, including fixed transaction charges, financing, payouts, and optional services. A lower headline percentage does not always produce a lower total bill.