Explainer · BTC → Fiat

Bitcoin to fiat — how conversion actually works

Spreads, settlement rails, partner economics — what every BTC seller should understand before clicking Sell, and the fastest non-custodial path in 2026.

Convert without an exchange — Lightning Pay
Open sourceNon-custodialNo KYC
Fastest path
<60s
Lightning + instant rail
All-in cost
0.7%
Lightning Pay typical
Rails covered
24/7
weekends included
Custody
Yours
until moment of sale
01

What 'Bitcoin to fiat' actually means

Converting Bitcoin to fiat is the act of selling BTC and receiving a government-issued currency — USD, EUR, GBP, BRL, INR — in exchange. Three things happen in sequence: the BTC is delivered to a venue (an exchange order book or a market-maker), the trade matches at a price, and the resulting fiat is paid out to your bank account through a payment rail. Each of those three steps has its own cost, its own delay, and its own custody model.

The fastest non-custodial path in 2026 is a Lightning off-ramp: BTC leaves your wallet over Lightning, a regulated partner converts at quote, and fiat lands in your bank via FedNow / SEPA Instant / Pix in 60–120 seconds, 24/7.
02

Spread vs visible fee — where the cost hides

Headline fee tables are misleading. The spread — the gap between the buy and sell price a venue quotes — is usually larger than the fee line item. A 1% spread on a $5,000 sale is $50, often more than a $25 wire fee on the same transaction. Always compare the fiat amount you actually receive, not just the advertised fee.

Where the cost lives on a $5,000 BTC sale (typical 2026 numbers)
VenueVisible feeSpreadAll-in cost
Coinbase (Simple Buy/Sell)01.5–2%$75–$100
Coinbase Pro / Advanced0.4%0.1–0.3%$25–$35
Kraken0.26% (taker)0.1–0.3%$18–$28
Binance0.1%0.1–0.2%$10–$15 + payout
Cash App~1.75%embedded$87
Lightning Pay (off-ramp)0.5% flat0.2–0.4%$25–$45 · shown up-front
03

Settlement rails by region

After the trade matches, the fiat has to physically reach your bank. The rail you use determines whether that takes 10 seconds or 5 days, whether it works on a Sunday, and how much you pay.

RegionRailSpeedCostAvailable
USFedNow / RTP<60sFree24/7
USACH1–3 daysFreeBanking hours
USWireSame day$15–$30Banking hours
EUSEPA Instant10sFree24/7
UKFaster PaymentsInstantFree24/7
BrazilPixInstantFree24/7
MexicoSPEINear-instantFree24/7
IndiaUPI / IMPSInstantFree24/7
GlobalSWIFT1–3 days$15–$50Banking hours
Lightning Pay routes to whichever rail is fastest and cheapest for your currency automatically — you pick the bank account, not the rail.
04

Why Lightning changes the picture

Traditional BTC → fiat means: deposit BTC on-chain (wait ~30 minutes for confirmations), pay a network fee ($1–$5), trade against an order book, withdraw fiat via ACH (1–3 days). Total time: anywhere from one to five days. Total cost: often 1.5–3%.

Lightning settles BTC in under a second for fractions of a cent. Paired with an instant fiat rail, the entire conversion takes 60–120 seconds and costs 0.5–0.8% all-in — with the BTC sitting in your own wallet right up to the moment of sale.

Sub-second BTC leg

Lightning settles in 200–800ms regardless of amount.

24/7 fiat leg

Instant rails (FedNow, SEPA Instant, Pix) work on weekends and holidays.

Custody till sale

Keys never leave your device. The off-ramp only sees a Lightning invoice.
05

Partner economics — who pays whom

Behind every BTC → fiat conversion sits a market maker hedging price risk in milliseconds. Strike, MoonPay and regional partners post live two-way quotes; Lightning Pay routes to whichever offers the best all-in price for your currency and rail at the moment you confirm. The fee schedule is fixed and transparent:

Market maker
earns the spread (0.2–0.5%), hedges instantly on a derivatives venue.
Off-ramp partner
fixed bps fee, handles bank-side AML/KYC and rail integration.
Lightning Pay
0.5% network/withdrawal markup — shown up-front, never hidden in spread.
Monthly fee
$0
FX markup on Visa card
0%
06

Step-by-step: BTC → bank in 60 seconds

  1. 1

    Open Lightning Pay → Withdraw to bank

    Pick your currency and the receiving bank account.
  2. 2

    Enter the amount

    The quote shows BTC sent, fiat received, the 0.5% markup, and the rail (FedNow / SEPA Instant / Pix / etc.) — all before you confirm.
  3. 3

    Confirm with Face ID / PIN

    Lightning Pay broadcasts the payment. The market maker locks the BTC leg in milliseconds.
  4. 4

    Fiat lands in your bank

    Typically 10–120 seconds on instant rails. Tax Assistant logs cost basis automatically.
07

Common mistakes

Comparing fees instead of all-in cost.
A '0% fee' venue with a 2% spread costs more than a 0.5% flat-fee one. Always check the fiat amount actually received.
Using ACH when you need same-day money.
ACH doesn't move on weekends. If your bill is due Monday and it's Friday afternoon, use an instant rail.
Leaving BTC on an exchange between sale and withdrawal.
Even a 24-hour custody window is exchange-failure risk you don't need to take.
Ignoring the spread on 'free' platforms.
Cash App, Robinhood and most consumer apps make their money in the spread. Pro venues with line-item fees are usually cheaper end-to-end.
Selling on an exchange that doesn't support your local rail.
Forces a SWIFT wire (1–3 days, $15–50) instead of free instant settlement.
08

Bitcoin to fiat FAQ

Ready to own your Bitcoin?

Lightning Pay is free, open source, and non-custodial. Your keys never leave your device.

Convert without an exchange — Lightning Pay

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