Coinbase Bitcoin Mortgage Down Payment: How It Works

Coinbase and Better Mortgage took bitcoin-backed home loans nationwide on Wednesday, August 26, letting US buyers use crypto as a mortgage down payment without cashing it out first. That's the headline, but it undersells what actually happened. Milo and Ledn have offered crypto-collateral mortgages since 2022. What's new is that Fannie Mae will now buy these loans through its normal conforming pipeline, the same channel that absorbs most ordinary US mortgages. A boutique product just got access to trillions of dollars in mortgage-market plumbing.

The move caps a slow regulatory build. In June 2025, FHFA director Bill Pulte directed Fannie Mae and Freddie Mac to start counting crypto as a reserve asset. Fannie approved this specific Coinbase-Better structure as a pilot on March 26, 2026. Coinbase One members got early access on August 12, and full general availability followed two weeks later. Coinbase says roughly $260 million in demand sat on a waitlist before launch, though that's projected interest, not closed loans.

The product isn't one bitcoin-backed mortgage, it's two loans stacked together. A borrower still gets a standard, Fannie-conforming first-lien mortgage, priced and underwritten the normal way. Sitting behind it is a second-lien loan that funds the down payment, collateralized by bitcoin or USDC held at Better through Coinbase Prime's custody arm.

The collateral requirements do the real work of limiting risk to the lender. Bitcoin has to be pledged at 250% of the loan's value; USDC, being a dollar-pegged stablecoin, only needs 125%. That gap reflects bitcoin's volatility risk versus a token designed to track $1. If the collateral value falls and a borrower goes 60 days delinquent, the lender can force a liquidation, which converts pledged crypto to cash to cover the loan. That triggers exactly the taxable sale the whole product is designed to help borrowers avoid, so the downside case is not hypothetical.

This is the part most likely to get searched, and it deserves a plain answer: yes, but not because of any special crypto tax ruling. Pledging bitcoin as collateral isn't selling it. The IRS treats a sale as a taxable event because you're disposing of the asset and realizing a gain or loss; a loan secured against an asset you still own is not a disposal. Cost basis and holding period carry through untouched, exactly as they would if you took out a securities-backed line of credit against a stock portfolio instead of selling shares.

That's an old, well-established piece of tax law being applied to a new type of collateral, not a carve-out written for crypto. The genuine costs sit elsewhere: expect a rate 0.5 to 1.5 percentage points above a conventional down-payment loan, plus the liquidation risk described above. For a borrower confident in bitcoin's long-term trajectory who doesn't want to sell into a rally or lock in a big capital-gains bill, that trade can make sense. For most other buyers, the collateral overhead and rate premium make it a worse deal than simply saving cash or selling a modest slice of crypto.

Coinbase and Better are the clearest winners. Coinbase gets a new fee-generating custody and origination relationship layered on top of its exchange business, plus a Fannie Mae stamp of approval that other lenders will need to match if they want to compete. Long-time bitcoin holders sitting on large unrealized gains, who want liquidity for a home purchase without triggering a tax bill or selling a core position, are the intended customer.

Niche crypto-lenders like Milo and Ledn are the more exposed party. They built this exact product years before Fannie's pipeline existed, but a Fannie-backed version priced through a conforming mortgage will generally beat a smaller, non-conforming competitor on rate and distribution once real volume shows up. Borrowers who don't hold meaningful crypto get nothing from this launch either way.

Coinbase's stock (COIN) rose about 5.1% on the August 26 announcement and closed near $190.76 the next day, but that move is hard to separate cleanly from the broader rally in crypto-linked stocks this week, itself driven by bitcoin pushing above the $78,000 level and optimism around possible Senate progress on the CLARITY Act. Some of COIN's pop is this product; more of it is probably beta to bitcoin's own move.

The real test is origination volume, not headlines. A $260 million waitlist is demand nobody has actually funded yet, and Coinbase hasn't disclosed how many loans have closed under general availability. The base case is a slow ramp through the fourth quarter of 2026 as that pipeline converts into real mortgages. The bull case is Freddie Mac following FHFA's push into a competing product, or Fannie loosening the collateral haircuts, turning this from a pilot-scale novelty into real conforming-market volume. The bear case is a bitcoin drawdown that lands during a wave of 60-day delinquencies, producing a forced-liquidation headline messy enough to invite political pushback on the FHFA directive that made this possible in the first place.