Every merchant accepting payments faces the same basic question: what does it cost me to receive money from my customers? The answer in 2026 depends on which payment method you are using, where you are operating, and how you count the costs.
I have sat with enough small merchants working through this math to know that the common comparisons are usually too simple. Card fees versus Lightning fees sounds like a clean comparison, but the real cost structure is more layered than that. This guide breaks it down honestly.
Card Payment Costs in 2026
Card payments, whether Visa, Mastercard, or local card schemes, have a well-established cost structure. For small merchants, the total cost of accepting a card payment includes:
Interchange fees. Paid to the card-issuing bank. Typically 0.5% to 2.0% of the transaction depending on the card type and region. Premium and international cards carry higher interchange rates.
Processing fees. Paid to the payment processor or acquirer. Usually 0.3% to 1.0% additional.
Terminal or service fees. Monthly rental or purchase cost for payment terminals. For small merchants, this can be $20 to $50 per month.
Chargeback risk. Card payments can be reversed through the chargeback process. For every chargeback a merchant faces, there is a fee (typically $15 to $25) regardless of the outcome. Even merchants who win chargeback disputes lose money on processing costs.
Settlement timing. Card payments typically settle to the merchant’s bank account in 1 to 3 business days. During that time, the merchant has provided goods but not received money.
All-in cost for a $10 transaction: Approximately $0.30 to $0.50 (3% to 5%). All-in cost for a $100 transaction: Approximately $2.00 to $3.50 (2% to 3.5%).
The percentage cost is higher for small transactions because some fees are flat rather than proportional. This makes card payments particularly expensive for merchants with low average transaction values, which describes most small shops and market vendors.
Mobile Money Costs in 2026
In markets where mobile money is established, particularly across sub-Saharan Africa, the fee structure differs:
Merchant fees. Mobile money providers charge merchants a percentage of each transaction, typically 0.5% to 1.5%. Some providers offer lower rates for high-volume merchants.
Cash-out fees. When merchants withdraw their mobile money balance as cash, there is an additional fee, typically 1% to 2% of the amount. This fee is often overlooked in cost comparisons.
No terminal costs. Mobile money payments use the merchant’s existing phone. No separate hardware required.
No chargeback mechanism. Mobile money payments are final, similar to cash. The merchant does not face chargeback risk.
Settlement timing. Mobile money payments are available in the merchant’s mobile money wallet immediately. Withdrawing to cash or bank accounts takes additional time.
All-in cost for a $10 transaction (including eventual cash-out): Approximately $0.15 to $0.35 (1.5% to 3.5%). All-in cost for a $100 transaction (including eventual cash-out): Approximately $1.50 to $3.50 (1.5% to 3.5%).
Mobile money costs are more predictable and generally lower than card costs for small merchants. This is a major reason why mobile money has succeeded in markets where it competes with cards. The guide on mobile money reaching $2 trillion explores the broader ecosystem.
Lightning Payment Costs in 2026
Lightning payment costs for merchants are structured differently from both cards and mobile money:
Network routing fees. The Lightning Network charges routing fees that are typically less than one satoshi for most transactions. These are paid by the sender, not the merchant. For the receiving merchant, the network fee is effectively zero.
Wallet or service provider fees. If the merchant uses a custodial Lightning wallet or a payment service, the provider may charge a receiving fee, typically 0% to 1% depending on the service.
Conversion costs. This is where most of the real cost lives. If the merchant converts Bitcoin to local currency after receiving a Lightning payment, the conversion spread and any exchange fees typically range from 1% to 5%, depending on the market, the conversion method, and the amount.
No terminal costs. Like mobile money, Lightning payments use the merchant’s existing phone.
No chargebacks. Lightning payments are final and irreversible. The merchant bears no chargeback risk.
Settlement timing. The Lightning payment arrives instantly. Conversion to local currency takes additional time depending on the method.
All-in cost for a $10 transaction (with conversion): Approximately $0.10 to $0.50 (1% to 5%). All-in cost for a $100 transaction (with conversion): Approximately $1.00 to $5.00 (1% to 5%).
The range is wide because conversion costs vary enormously by market. In markets with liquid Bitcoin exchanges and competitive spreads, the total cost can be lower than cards. In markets where conversion is difficult, the cost can be higher.
The Honest Comparison Table
Here is what the math actually looks like for a small merchant processing a $10 and a $100 transaction:
| Cost Component | Card ($10) | Card ($100) | Mobile Money ($10) | Mobile Money ($100) | Lightning ($10) | Lightning ($100) |
|---|---|---|---|---|---|---|
| Network/interchange | $0.20-0.30 | $1.00-2.00 | — | — | <$0.01 | <$0.01 |
| Processing/merchant fee | $0.05-0.10 | $0.30-1.00 | $0.05-0.15 | $0.50-1.50 | $0.00-0.10 | $0.00-1.00 |
| Terminal/hardware | prorated | prorated | $0.00 | $0.00 | $0.00 | $0.00 |
| Cash-out/conversion | — | — | $0.10-0.20 | $1.00-2.00 | $0.10-0.50 | $1.00-5.00 |
| Chargeback risk | yes | yes | no | no | no | no |
| Total range | $0.30-0.50 | $2.00-3.50 | $0.15-0.35 | $1.50-3.50 | $0.10-0.50 | $1.00-5.00 |
The table shows that Lightning is competitive with or cheaper than cards for most transaction sizes, but the comparison with mobile money is much closer. In markets where mobile money conversion to cash is cheap and Lightning-to-local-currency conversion is expensive, mobile money wins on cost. In markets where the reverse is true, Lightning wins.
What the Numbers Do Not Capture
Cost per transaction is only part of the merchant math. Other factors that matter:
Customer payment preference. If your customers prefer mobile money and very few have Lightning wallets, accepting Lightning will generate few transactions regardless of the fee structure. Payment method availability matters more than cost optimisation.
Operational complexity. Managing three payment systems (cash, mobile money, Lightning) requires more reconciliation effort than managing two. The complexity cost is real even if it does not appear in a fee table.
Volume assumptions. Card terminal fees are partially fixed costs that become less significant as transaction volume increases. Lightning and mobile money costs scale linearly with volume.
Currency risk. If you hold Bitcoin rather than converting immediately, you are taking on price volatility. This is not a fee, but it is a cost that merchants need to account for. Our safety guide addresses this risk in more detail.
Practical Recommendations for Small Merchants
Based on the math and on field experience from our merchant onboarding work:
Accept Lightning as an additional option, not a replacement. Keep accepting whatever payment methods your customers already use. Add Lightning for customers who want it and for the specific advantages it offers.
Monitor your actual conversion costs. Do not rely on theoretical fee comparisons. Track what you actually pay for every conversion over a month and compare against your mobile money and card costs.
Do not hold more Bitcoin than you can afford to lose. If your margins are thin, convert Lightning payments to local currency promptly. Holding Bitcoin is a savings decision, not a payment processing decision.
Factor in the customer acquisition effect. Some merchants find that accepting Lightning attracts new customers, particularly international or tech-savvy customers who would not otherwise shop at their store. This revenue effect can outweigh the fee comparison.
Common Questions
Is Lightning really cheaper than mobile money? It depends entirely on the conversion costs in your market. The Lightning network fee itself is essentially zero. The total cost depends on what it costs you to convert Bitcoin to local currency.
Should I stop accepting cards if Lightning is cheaper? No. Accept every payment method your customers want to use. Removing a payment option loses customers.
What if I just keep the Bitcoin? If you have stable finances and can afford the volatility risk, keeping some or all Bitcoin payments as Bitcoin is a personal financial decision. It is not a payment processing optimisation.
How do I calculate my real Lightning cost? Total Bitcoin received minus total local currency received after conversion, divided by total Bitcoin received. Track this monthly.
Conclusion
The merchant math in 2026 is not a simple story of one payment method being universally cheapest. Cards are expensive for small transactions. Mobile money is cost-effective in markets where it is established. Lightning is potentially the cheapest option but only if conversion costs are manageable.
For small merchants, the practical approach is to offer multiple payment options, track actual costs carefully, and make decisions based on real data from your own business rather than theoretical comparisons. The best payment method is the one your customers will use.
For more detail on the practical setup, see the Lightning payments for shops checklist and the merchant readiness checklist.