A Lightning Force Close Costs 93 Cents. The 60-Hour Wait Is the Real Bill
A new preprint puts the median cost of a forced Lightning exit at 925 satoshis per channel, roughly under a dollar. The number that should worry operators is the other one: a 2.5-day median lockup on the broadcaster's balance.
The fee is basically noise. A preprint examining public force closes put the median cost at 925 satoshis per channel. Convert that at $100,000 bitcoin and you're paying about 93 cents to exit a channel you didn't want to exit.
Now the part that actually bites. The broadcaster's balance didn't move for a median of 2.5 days. Sixty hours where the money exists on-chain but isn't spendable, sitting through confirmation depth and the timelock that protects the counterparty.
Anyone who's run a node knows the mechanics. Broadcast the commitment transaction, wait out the CSV delay, wait for confirmations. The protocol does exactly what it's designed to do. It just doesn't do it fast.
So the headline number misleads in a predictable way. Cheap settlement isn't fast settlement, and Lightning's force-close path manages to be both cheap and slow at once. For a hobbyist node, that's a rounding error. For a merchant routing real volume, it's a liquidity event.
Run the math on a payment processor clearing $50,000 a day. A 2.5-day lockup on a forced exit isn't a fee problem. It's a working capital problem, and it lands on whoever's balance gets stuck, usually the operator running the show. Most will never force close. The ones who do will remember it.
There's a caveat worth stating plainly. This is a preprint, not peer-reviewed, and it only covers public force closes. Private channel closures stay off the ledger entirely, which means the real median could look different once someone gets the full picture. Treat the figures as directional, not definitive.
Worth noting too that 925 sats is a median. Half the cohort paid more. The tail is where the painful stories live, and nobody publishes a chart of the worst 5%.
My read: the industry keeps benchmarking channel fees because fees are easy to quote on a slide. Idle capital is harder to sell. But at any real volume, the 60-hour gap costs more than the 93 cents ever will.
Watch for treasury and routing tooling that prices the lockup itself, not the sats.