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Spending Bitcoin directly works much like any QR payment. The merchant shows you a payment request — a QR code or a Bitcoin/Lightning address with an amount — and you scan it in your wallet, check the amount and fee, and confirm. The key decision is which network to use: on-chain Bitcoin for larger or less time-sensitive payments, and the Lightning Network for everyday spending where you want it instant and almost free.

The Lightning Network is what makes Bitcoin practical for a coffee or a small online purchase. It settles payments off-chain in seconds for a fee that's usually a fraction of a cent, then nets out to the main chain later. Most modern Bitcoin wallets support both; if a merchant shows a 'lightning' invoice (often starting with 'lnbc'), pay it from a Lightning-enabled wallet rather than sending an on-chain transaction.

Plenty of merchants still don't accept Bitcoin at the till, and there are two clean workarounds. A Bitcoin debit card converts your BTC to local currency at the moment of purchase, so you tap or swipe like any card while it sells a little Bitcoin behind the scenes. Alternatively, services that sell gift cards for Bitcoin let you load credit for large retailers and travel brands — you spend the gift card, not the Bitcoin directly.

A few habits keep spending safe and cheap. Confirm the exact amount and the receiving address before approving — payments are irreversible once broadcast. On-chain, set a fee appropriate to urgency (the network is a live fee auction, so a quiet period costs far less). And keep only a small 'spending' balance in a hot mobile wallet, leaving long-term savings in cold storage you don't expose to day-to-day use.

Finally, remember the tax angle. In many countries, paying with Bitcoin counts as disposing of an asset, which can trigger a taxable gain or loss based on what the coins were worth when you acquired them versus when you spent them. You don't need to overthink a coffee, but keeping a simple record of larger purchases makes any year-end reporting painless. This is educational information, not financial or tax advice.