Tax implications of buying a home with crypto

The Bay Area has the highest concentration of crypto holders in the country. Most will at some point face the same question: what happens at tax time when I sell BTC or ETH to fund a home purchase? This page covers the three tax topics that come up in every crypto-funded closing (California property tax, federal capital gains on the crypto sale, and the 1031 exchange rules), plus the source-of-funds documentation title companies ask for.

None of this is tax advice. The numbers below are rules of thumb for 2026 in California. Your situation depends on income, basis, holding period, and deal structure. Talk to your CPA before you commit.

California property tax

California property tax runs 1.1-1.3% of assessed value per year, depending on the county. Santa Clara County sits at the higher end. The rate itself is set by local ballot measures, but the rules around how the assessment grows come from Proposition 13, passed in 1978.

Prop 13 caps the annual increase in a property's assessed value at 2% per year, regardless of how much the market moves. When you buy, the property is reassessed to its sale price, and the 2% cap kicks in from there. A $2M home bought today gets a fresh assessment at $2M, and the next year's cap increase is $40K of assessed value, not the full market move. That is not a crypto-specific rule, but it changes the long-term carry math when you compare owning with renting in the Bay Area. Consult your CPA on the projected tax bill.

There is also the supplemental tax. When a property changes hands, the county reassesses and issues a supplemental bill covering the difference between the old and new assessment for the remainder of the tax year. The buyer pays this, not the seller, and it is prorated to the close of escrow date. Most first-time buyers in the Bay Area are surprised by it, because it lands 4-8 weeks after closing and can run several thousand dollars on a typical San Jose single-family home.

Federal capital gains on crypto

When you sell BTC, ETH, or other crypto for USD and use the proceeds as a down payment, the IRS treats the gain as a taxable event. The rate depends on how long you held the asset. Long-term (held more than one year) is 0%, 15%, or 20% federal depending on income bracket, plus the 3.8% Net Investment Income Tax above the threshold. Short-term (held one year or less) is your ordinary marginal income tax rate, which in the Bay Area can run 32-37% federal plus 9.3-13.3% California state.

The holding period matters more than the dollar amount. A $200,000 gain on coins held 11 months can cost more than a $400,000 gain on coins held 13 months. This is the single biggest tax lever most crypto buyers have, and the reason most of my clients talk to their CPA before deciding how much to liquidate. Do not sell in a panic when an offer comes in.

Cost basis is the other lever. If you acquired coins at multiple times and prices, you need to track lot-by-lot cost basis. The default is FIFO (first-in, first-out), but specific identification is allowed if your records support it. Most exchanges produce a Form 1099-B with FIFO only. If you have moved coins between wallets, exchanges, and DeFi protocols, the records get messy fast. A CPA who works with crypto will know how to reconstruct basis from on-chain history.

1031 exchange — what applies and what doesn't

The 1031 like-kind exchange is one of the most powerful tax tools in real estate. You sell one investment property, roll the proceeds into another, and defer all the capital gains. The rules are specific: both properties must be held for productive use in a trade or business or for investment, the exchange must be structured through a qualified intermediary, and the timeline is 45 days to identify the replacement property and 180 days to close.

Crypto does not fit. The IRS treats crypto as property, not as real property, and Section 1031 specifically requires real property. You cannot directly 1031 BTC into a house. What you can do, with proper CPA guidance, is sell your crypto, pay the capital gains tax, and then use a 1031 exchange when you sell the home later, provided the home was held as an investment and the 1031 rules are followed. The 1031 defers the gain on the home sale, not on the crypto sale.

Be skeptical of aggressive strategies circulating online that claim you can structure a 1031 to cover crypto gains. The IRS has not blessed any of these structures, and the recent enforcement record on creative crypto tax planning is not kind to taxpayers. If a CPA proposes a novel structure, ask for the authority (a letter ruling, private letter ruling, or a published court case) and get a second opinion.

Working with a CPA who understands both

Most CPAs are trained on traditional assets: stocks, bonds, real estate. Crypto adds a layer that most generalists have not dealt with. The questions worth asking a CPA before you hire them: have you done cost basis reconstruction for a client who moved coins between exchanges and wallets? Have you filed Form 8949 with crypto line items? Do you know the difference between a taxable event and a non-taxable transfer when coins move on-chain? Do you track IRS crypto guidance updates?

A crypto-aware CPA will charge more than a generalist, typically $300-500 per hour, and most clients find the cost worth it. A single misclassified lot can cost tens of thousands of dollars at audit. The Bay Area has a handful of firms that specialize in crypto taxation, mostly in San Francisco and Palo Alto. If you do not have a CPA yet and you are buying a home with crypto, this is the first referral I will make after we get into contract.

One important boundary: my role is the real estate transaction. I coordinate with your CPA on tax timing and structure, but I do not give tax advice. If something I am saying conflicts with what your CPA says, your CPA wins.

Documentation title companies want

When the down payment comes from a crypto sale, the title company will ask for a source-of-funds package before they disburse funds. The package has three parts: proof you own the wallet (a signed message or seed signature), history of the coins (where they came from, including exchange purchase, mining, staking rewards, or airdrop), and clean-funds attestation (no links to darknet markets, mixing services, or sanctioned addresses).

The history is the longest part. If your BTC came from Coinbase in 2017 and has stayed in cold storage since, that is a clean three-line trail. If your BTC came from a DEX in 2021, moved through a mixing protocol, and then sat in a wallet, the trail is harder to defend and some title companies will refuse the file. Chainalysis and Elliptic are the two main blockchain-forensics firms title companies use.

Most title companies in the Bay Area have done this before. Fidelity National Title, First American, and Chicago Title all have crypto-trained escrow officers on staff. Old Republic and Stewart have some capacity but it varies by office. I will route your file to whichever escrow officer has handled your exchange or your chain before. Get the source-of-funds package together before you go into contract, not after.

Talk to a crypto-aware Realtor

Buying a home with crypto adds two layers of complexity on top of an already complex transaction: tax timing and source-of-funds documentation. Both are solvable. Neither is something you want to handle last-minute.

If you are holding BTC or ETH and you are 2-6 months from a home purchase in the Bay Area, the right next step is a 15-minute call. We will walk through what you are holding, your target price range, and your timeline. I will tell you which title companies are best for your exchange, which CPAs in the Bay Area do this work, and where the realistic paths are.

Schedule the 15-minute call Or run the free AI Visibility Audit