Fannie Mae Crypto Guidelines and Bitcoin Verification for Lenders

This guide is for underwriters, processors, loan officers and QC managers at US mortgage lenders and brokers who now see crypto in a growing share of asset files. The borrower says the down payment is "in bitcoin." Your job is to turn that into dollars you can verify, a deposit you can source, and a file that survives post-closing review.

We sell Bitcoin on-chain data, so weigh our view accordingly. The guideline text below was read from Fannie Mae's Selling Guide on 6 October 2026, the price figures come from our own daily candles, and where an asset verification vendor or a blockchain analytics firm does a part of this job better than we do, we say so.

What Fannie Mae's crypto guidelines say today

Section B3-4.1-04, Virtual Currency, has carried the same effective date, 4 May 2022, for over four years. It makes three rules. First, virtual currency exchanged into US dollars is acceptable for the down payment, closing costs and financial reserves, provided there is documented evidence that it was exchanged into dollars and is held in a US or state regulated financial institution, and the funds are verified in dollars before closing. Second, when a large deposit came from virtual currency, "the lender must obtain sufficient documentation to verify the funds originated from the borrower's virtual currency account." Third, virtual currency cannot be used for the earnest money deposit on the sales contract.

Two newer developments sit next to that rule without replacing it. On 25 June 2025 the FHFA director ordered Fannie Mae and Freddie Mac to prepare proposals to count crypto in reserve assessments without requiring conversion to dollars, limited to crypto that can be evidenced and stored on a US regulated centralized exchange, with volatility adjustments and caps on the share of reserves it can make up. And in March 2026 Fannie Mae accepted a crypto-backed product from Better Home and Finance with Coinbase, where the borrower pledges bitcoin or USDC as collateral for a second loan that funds the down payment, at $250 of bitcoin for every $100 borrowed.

For a standard conforming file today, the working rule is still B3-4.1-04: sell, deposit, source, verify. Check your investor's overlays, because many lenders add their own seasoning and documentation requirements on top.

Can crypto be used for a down payment on a mortgage?

Yes, once it is sold. Under Fannie Mae's guide the borrower converts the crypto to US dollars, the dollars land in a regulated bank or similar institution, and the lender verifies the dollar balance before closing. The lender also documents that a large deposit came from the borrower's own crypto account. The crypto itself, unsold, does not count for a conventional conforming loan unless it is pledged inside a separate crypto-backed product.

Does Fannie Mae accept crypto as reserves?

Only as dollars today. Reserves follow the same B3-4.1-04 rule as the down payment: converted, held at a regulated institution and verified in dollars. The 2025 FHFA order asked the enterprises to propose counting unconverted crypto held on a US regulated exchange, with a volatility haircut and a cap. Until a Selling Guide update says otherwise, an underwriter who counts the borrower's exchange balance in bitcoin is outside the guide.

How much can bitcoin fall between application and closing?

This is the number that breaks files. A borrower with 2 BTC planning the down payment at application has a dollar figure in mind, and conversion often happens weeks later. We took every daily close from 1 October 2021 to 2 October 2026 in our price data (one US dollar order book, UTC days, 1,798 starting days for the 30-day window) and measured, for each start day, the lowest close over the following 30, 45 and 60 days.

The worst windows are worse than most borrowers imagine. Starting on 4 May 2022, the lowest close in the next 45 days was 52.2 percent below the start. Nor is that only a 2022 story. In the twelve months to 2 October 2026, more than a third of 45-day windows (36.3 percent) had a dip of 20 percent or more, and the close of 14 January 2026, $96,942, had fallen to $62,795 by 5 February, 35.2 percent lower 22 days later. Those 2 BTC went from $193,884 to $125,590 in three weeks.

Two practical consequences follow. Advise crypto borrowers to convert early, ideally before the asset statements you will rely on are pulled, so the money is seasoned as dollars. And if conversion happens late, plan the pre-closing reverification as a real check rather than a formality, because the median case is fine and the tail case kills the deal. The same daily and hourly candles are available through our Bitcoin OHLC API if your pricing or risk team wants to run its own window.

How to source a large deposit that came from bitcoin

The deposit in the bank statement is the easy part. The guide asks you to show it "originated from the borrower's virtual currency account," and that is a chain of three documents, sometimes four.

1. The bank statement showing the incoming wire or ACH, with the date and amount.
2. The exchange account statement or transaction history in the borrower's name, showing the sale of the bitcoin and the withdrawal of dollars that matches the deposit.
3. Proof the bitcoin was the borrower's, normally the exchange history of when it was bought or deposited.
4. If the coins came in from a self-custody wallet, the on-chain transaction that moved them to the exchange: its transaction id, the confirmation block and time, the amount, and the sending addresses.

Step four is where files stall, because exchange statements show an external deposit and nothing about where it came from. A transaction lookup answers it in seconds: the transaction id from the exchange history returns the confirmation height, the block time, the outputs and the input addresses. If the borrower gives you the extended public key of the wallet, an xpub balance API call shows the wallet's addresses and balances without any ability to spend, and the Bitcoin address balance history API states what those addresses held on any earlier date, which is how you see whether the coins sat there for months or arrived the week before application. The rest of the asset file, from bank statements to pay stubs, can run through a loan document analysis tool so the crypto trail is the only part an underwriter reads by hand.

One caution. The chain shows that coins moved between addresses. It does not prove who controls an address. Pair the on-chain record with the exchange history in the borrower's name, or a signed message from the wallet, before you treat an address as the borrower's. Our guide to crypto proof of funds verification for escrow and lenders covers which signing methods work for which address types.

Crypto asset verification software for mortgage lenders compared

For most lenders the answer is the stack they already have plus one data source for step four. A transaction lookup costs 1 credit, so even a busy shop sourcing a few hundred crypto deposits a month uses a fraction of the $49 Developer plan. A lender that wants the checks inside its loan origination system can call the same API from a script, and our Bitcoin transaction API page shows the fields returned.

A crypto asset workflow an underwriter can repeat

1. At application, ask whether any funds to close or reserves are in crypto, and where: exchange, self-custody or both.
2. Record the exchange account holder name and request statements covering the same period as the bank statements.
3. For coins moved in from self-custody, take the transaction id from the exchange deposit record and look it up on chain. File the block height, time and amount.
4. Tell the borrower to convert early and keep the proceeds in one account, so the deposit is easy to source and does not swing with the market.
5. Match the sale to the deposit: exchange withdrawal amount and date against the bank statement credit.
6. Reverify in dollars before closing, as B3-4.1-04 requires, and never accept crypto as earnest money.

What changes when bitcoin is the collateral, not the down payment

Crypto-backed products flip the risk. The coins stay unsold, pledged with a custodian, and the lender cares whether they are still there and what they are worth on any given day. That is a monitoring job rather than a sourcing job: watch the pledged addresses for any spend, mark the collateral to market daily, and keep a balance at each month-end block for your investor reporting. Our guide to Bitcoin collateral monitoring for crypto lenders covers that setup, and a Bitcoin webhook API sends an alert the moment a pledged address moves.

Can you use crypto as earnest money?

Not under Fannie Mae's guide. B3-4.1-04 says virtual currency cannot be used for the earnest money deposit on the sales contract for the subject property. A borrower who wants crypto to fund the earnest money should sell it first, let the dollars settle in a bank account, and pay the deposit from there, which then becomes an ordinary sourced deposit.

BitcoinDatabase provides informational on-chain data only. It is not legal, lending or investment advice. Fannie Mae guideline text was read from the Selling Guide on 6 October 2026, the FHFA order and the crypto-backed product were described as reported in June 2025 and March 2026, and investor overlays vary. Confirm current requirements in the Selling Guide and with your investors before you change underwriting procedures.