How to Pay for Anything With Instant Swaps

Here's a trick that surprises people: you can pay someone in a coin you don't even hold. Say a merchant or a friend wants Bitcoin, but all you have is Monero or Ethereum. Instead of moving funds onto an exchange, converting, and withdrawing, you can use an instant swap with a fixed rate and simply enter their Bitcoin address as the payout. The swap converts your coin and sends the exact amount of BTC straight to the recipient. This turns instant swaps into a universal payment tool: pay for anything, in any crypto, using whatever you already have.

The idea: swap directly to the recipient

Every instant swap asks for a receiving address — the wallet that gets the output coin. Normally that's your own wallet. But it doesn't have to be: if you put the recipient's address there instead, the swap delivers the converted coins directly to them. Combine that with a fixed rate (which locks the exact output amount) and you can pay a precise invoice in a coin you don't hold. New to swaps? Start with How to Use an Instant Swap Exchange.

How to pay someone with a fixed-rate swap

Get the payment details. Ask the recipient for their wallet address, the coin and network they want (e.g. Bitcoin on the Bitcoin network), and the exact amount owed.
Start a swap from your coin to theirs. Choose your input (XMR, ETH, whatever you hold) and their output coin (BTC).
Choose a fixed rate. Fixed locks the amount the recipient will receive, so you can match the invoice exactly. (More on this in Fixed vs Floating Rates: When to Use Each.)
Enter the recipient's address as the receiving address — and the memo/tag if their coin requires one.
Set your own refund address, so funds come back to you if the swap can't complete.
Send your deposit promptly. The service shows the exact amount of your coin to send; send it right away so the swap settles inside the rate-lock window.
Done. The swap converts and pays out the agreed BTC amount directly to the recipient.

Why use a fixed rate for payments

When you're paying a specific amount, you need certainty about what the recipient receives. A fixed rate guarantees the output, so you can set it to match the invoice exactly — no underpaying (which leaves a balance owed) and no overpaying. A floating rate, by contrast, settles at market when your deposit confirms, so the received amount can drift. For payments, fixed is almost always the right choice.

Make sure the swap completes in time

A fixed-rate quote is only locked for a limited window — the service is taking on the market risk, so it needs your deposit to arrive promptly. To make sure the payment lands:

Send immediately after starting the swap; don't let the quote expire.
Use an adequate network fee so your deposit confirms quickly.
Mind confirmation times for your input coin — slow-confirming coins are likelier to miss the window, so factor that in.
If the window is missed, the swap typically refunds your coin (to the refund address you set) or re-quotes — so you don't lose funds, but the payment is delayed.

Get the details right (it's irreversible)

Triple-check the recipient's address — read the first and last characters by eye, even if you scanned a QR code.
Match the network on both sides, and include any memo/tag the recipient's coin needs.
Account for the swap fee: you'll send a little more of your coin so the recipient receives the full fixed amount.
Stay within the swap's min/max for the pair.

For the full list of pitfalls, see Common Mistakes People Make With Instant Swaps.

What you can pay for this way

Invoices and merchants that only accept a specific coin like Bitcoin.
Paying a person who wants a coin you don't hold — settle in their currency from yours.
Donations to an address that takes a particular coin.
Spending any crypto at any crypto-accepting service, by converting on the fly.

In every case, the recipient just sees the coins they asked for — you simply paid from whatever you had.

Find a swap that supports your pair on SwapRaven

This works best with a reputable service that supports your exact pair and offers fixed rates. SwapRaven grades instant swap exchanges and aggregators on trust, fees, supported coins, and KYC/AML posture. Browse the directory to find a vetted, no-KYC instant swap, then pay anyone in any coin — straight from the crypto you already hold.