Stablecoins vs cards for merchants
On a fee table, a USD stablecoin received into a self-hosted wallet often looks cheaper than a card. Whether that holds for your business depends on your card rate, payment size, conversion costs and what you are willing to give up, including chargeback protection for your customers. This guide works through the numbers and then the parts the numbers leave out.
Key points
- Under the site's default illustrative assumptions, a USD stablecoin costs less than a card at every payment size.
- That result is sensitive: with an assumed 1.4% card rate, the card becomes cheaper on payments above $250.
- For a Canadian-dollar business, the USD-to-CAD conversion is the largest stablecoin cost, even on domestic sales.
- A fee comparison leaves out staff time, accounting, custody, refunds and the loss of customer dispute rights.
What is being compared
The card side assumes an online credit card rate of 2.6% + $0.30, a 2.5% FX cost on cross-border sales, a 0.5% dispute rate, a $25 fee per dispute and 60% of disputed value lost, with funds usable after two business days.
The stablecoin side assumes a USD-referenced token received into a self-hosted wallet: a $0.05 network fee per payment, a 1% USD-to-CAD conversion on all volume, a 0.5% off-ramp cost and one business day to reach the bank. No chargebacks are possible.
All of these are illustrative defaults, not market data or quotes. Replace them with your own statement figures and provider quotes in the payment cost comparison.
Worked examples
Four scenarios, all computed with the same assumptions, show how the gap moves with payment size and customer mix.
| Scenario | Card | USD stablecoin |
|---|---|---|
| Online shop: $50,000/month, $120 average, 15% cross-border | $1,815 (3.63%) | $771 (1.54%) |
| Same shop, all domestic customers | $1,627 (3.25%) | $771 (1.54%) |
| Small tickets: $10,000/month, $40 average, all domestic | $396 (3.96%) | $163 (1.63%) |
| B2B: $20,000/month, $2,500 average, 40% cross-border, card at 2.9% | $843 (4.22%) | $300 (1.50%) |
The stablecoin cost barely moves when cross-border sales disappear, because a Canadian-dollar business converts every USD token payment, domestic or not. The card cost falls once FX charges drop out.
Is there a break-even payment size?
A break-even (or crossover) size is the payment amount at which two rails cost the same for a single payment. Under the default assumptions, there is none for a USD stablecoin against a card: the stablecoin is assumed cheaper on both the percentage cost (1.5% against 2.6%) and the fixed cost ($0.05 against $0.30), so its line never crosses the card's.
Change one assumption and that answer changes. If your blended card rate were 1.4% + $0.30 instead, the two would cost the same on a $250 payment: below that the stablecoin is cheaper, above it the card is. For comparison, a native crypto-asset paid through a processor (1% fee, $1.50 network fee, 0.75% off-ramp) crosses below the default card cost once payments exceed about $141.18.
The lesson is not that one rail wins. It is that your actual card rate, from your statement, is the single most important input. See how card processing fees work to find it.
Adding stablecoins alongside cards
Replacing cards outright would remove an option your customers may rely on. A more modest question is what happens if some customers choose to pay another way.
Suppose a business with $50,000 a month currently takes 80% by card and 20% by Interac e-Transfer, with 15% of volume cross-border. If one in five customers switched from card to a USD stablecoin (a 60/20/20 mix), the default assumptions put the monthly cost at about $1,440 instead of about $1,648, a difference of roughly $209 a month. Whether customers would actually switch is outside the model, and the merchant scenario builder lets you try your own mix.
What the fee table leaves out
Cash fees are only part of the comparison. These items are real costs or trade-offs even when they do not appear in a monthly total.
- Customer protection. Card buyers can dispute a charge. Stablecoin payments are generally irreversible, so your refund policy becomes the only remedy. See chargebacks vs irreversible payments.
- Refund mechanics. Refunds are new outgoing payments, with network fees and a choice of which rate to refund at. Refunds on-chain covers policy options.
- Custody and security. A self-hosted wallet means your team controls the keys and carries the risk of losing them.
- Peg and issuer risk. A stablecoin can trade below its reference value between receipt and conversion.
- Accounting and tax. Each receipt needs a Canadian-dollar fair market value at the time of the transaction for income and, for registrants, GST/HST purposes.
- Regulatory fit. FINTRAC excludes a business that solely accepts payment for its own goods or services from MSB status; a model that does more may not qualify.
Running your own comparison
A fair comparison uses your figures, not defaults. This sequence keeps it honest.
- Calculate your effective card rate from the last three months of statements.
- Get written figures for conversion spread, off-ramp fees and withdrawal times from any provider you would use.
- Estimate the share of customers who might realistically pay by stablecoin, and test a low and a high case.
- Add an allowance for staff time on reconciliation, refunds and wallet security.
- Compare the totals, then weigh the non-cash trade-offs with your accountant and, where relevant, a lawyer.
Questions people ask
Are stablecoins always cheaper than cards?
No. They are cheaper under the site's default assumptions, but a lower card rate or higher conversion and off-ramp costs can reverse that, especially on larger payments.
What does it mean when the break-even calculation returns no answer?
It means that, under the assumptions entered, one rail is cheaper at every payment size, so the two cost lines never cross. Change the assumptions and a break-even point may appear.
Do stablecoin payments have chargebacks?
No. Confirmed on-chain payments are generally irreversible, which removes chargeback losses but also removes the customer's ability to dispute through the payment network.
Sources
- Finance Canada — Government reduces credit card fees for small business owners (2024)
- Finance Canada — Canada's stablecoin framework
- FINTRAC — MSB registration questions
- CRA — GST/HST and crypto-asset transactions
Reviewed October 30, 2026. Educational information only; not financial, legal, tax or investment advice. This site does not process payments or hold funds.