Crypto can be one of the hardest assets to plan for in a relationship. It is volatile, it can be held across multiple exchanges and wallets, and the ownership proof is not as simple as a bank statement.
If you are getting married or planning to, a prenup (often called a marriage contract in Ontario) can help you set clear expectations about what happens to your crypto in a prenup: what stays separate, what becomes shared, and how growth or losses are handled.
This guide walks through practical ways Canadian couples address Bitcoin, ETH, altcoins, DeFi positions, NFTs, and exchange accounts in a prenup, with province-specific notes and a checklist you can use before you meet a lawyer.
Important framing: A prenup is usually about clarity and planning, not assuming the relationship will fail. For crypto holders, it is also about reducing future disputes over valuation, disclosure, and access.
What happens to your crypto in a prenup in Canada?
In a well-drafted Canadian prenup, crypto is typically handled like any other property, but with extra detail to deal with:
- Ownership: Is it separate property (kept by the original holder) or shared?
- Increase in value: If one partner brought crypto into the relationship, does the growth stay separate or get shared?
- New purchases during the relationship: Are coins bought after marriage treated as family property or separate?
- Trading, staking, and yield: Are rewards income? Are they shared?
- Valuation method: How do you value crypto at separation, given volatility?
- Disclosure and proof: How do you document holdings without compromising private keys?
A prenup can also set out practical steps for record-keeping, reporting, and dispute resolution, which is often where crypto conflicts start.
Why crypto needs special treatment in a Canadian prenup
Crypto is “property” in the everyday sense, but it behaves differently than a house or a TFSA. Couples run into problems because crypto can be:
- Hard to trace: Multiple wallets, chains, and exchanges.
- Hard to value on a specific date: Prices move fast and differ across exchanges.
- Easy to co-mingle: Transfers between wallets can blur what was premarital vs acquired later.
- Tied to security and access: One person may control keys, hardware wallets, seed phrases, and 2FA.
- More than coins: DeFi LP tokens, staked assets, airdrops, NFTs, and governance tokens complicate “what you own.”
A strong prenup does not just say “my crypto is mine.” It usually defines what counts as crypto, how it is tracked, and what happens to gains and income.
Key questions to decide before drafting a prenup for crypto
If you want a prenup that actually addresses crypto realities, start here.
1) What counts as “crypto assets” in the agreement?
Many couples include a definition that covers:
- Cryptocurrencies (BTC, ETH, SOL, etc.)
- Stablecoins (USDC, USDT)
- Tokens, including governance tokens
- NFTs and digital collectibles
- DeFi positions (LP tokens, lending positions)
- Staked assets and staking derivatives
- Airdrops and forked assets
- Exchange credits and rewards
Actionable tip: Ask your lawyer to include a broad definition so you are not renegotiating later when a new asset type becomes relevant.
2) Are your pre-marriage holdings excluded, and what about growth?
A common approach is:
- Premarital crypto remains separate
- New crypto acquired after marriage may be shared or separate, depending on what you agree
- Growth on premarital crypto is explicitly addressed
That “growth” point matters. Crypto can go 10x. Your prenup can specify whether:
- The original holder keeps both the principal and growth
- The original holder keeps the principal, but growth is shared
- Growth is treated like an investment return and handled like other investment accounts
3) What happens if you buy crypto during the marriage?
This is often the biggest source of future conflict. A prenup can clarify whether crypto bought during the marriage is:
- Joint property (shared)
- Separate property if purchased from a separate account
- Shared only if purchased from joint funds
Practical approach: Some couples adopt a “source of funds” rule: assets purchased with joint income are shared, assets purchased with separate property remain separate, as long as records are kept.
4) How are staking rewards, interest, and yield treated?
Staking and DeFi create “income-like” flows. Couples often decide whether:
- Staking rewards are separate income
- Staking rewards are shared family income
- Rewards follow the underlying asset (if the staked ETH is separate, rewards are separate)
Be specific. A blanket “all crypto is separate” can still leave arguments about whether rewards are income generated during marriage.
5) How do you value crypto at separation?
A prenup can specify a valuation method such as:
- Price from a named index (for example, CoinMarketCap, CoinGecko) at a specific timestamp
- Average of prices across specified exchanges
- 7-day or 30-day average to reduce manipulation or extreme volatility
You can also define how to value illiquid assets:
- Thinly traded tokens
- NFTs (appraisal method, last sale method, floor price with caveats)
- Locked tokens or vesting schedules
What a crypto prenup clause typically covers (without giving away security)
A good crypto section usually includes a mix of legal and operational detail.
Ownership schedule: list assets without sharing private keys
Most couples do not put seed phrases or private keys in a prenup. Instead, they attach a schedule that might include:
- Exchanges used (Coinbase, Kraken, NDAX, Wealthsimple Crypto, etc.)
- Wallet types (hardware wallet brand, software wallet, custody provider)
- Public wallet addresses (where appropriate)
- Asset categories and approximate holdings on a specific date
Actionable tip: Keep a dated “snapshot” export (exchange statements, wallet screenshots, blockchain explorer links). Your lawyer can advise what is appropriate to share and how to keep it secure.
Co-mingling rules: how transfers affect ownership
Crypto is easy to co-mingle. A prenup can clarify things like:
- If separate crypto is transferred into a joint wallet, does it become joint?
- If joint funds are used to pay gas fees for separate assets, does that change ownership?
- If one partner uses joint income to add to a pre-marital position, how is it allocated?
A common solution is to specify that title or wallet location is not determinative, and ownership follows the agreed classification, provided there are records.
Handling lost keys, hacks, and fraud
This is uncomfortable but realistic. Couples sometimes include:
- Who bears the risk of loss for separate vs joint crypto
- What records must be kept (transaction history, proof of custody)
- A process for disclosure if a major loss occurs
You cannot “contract away” everything, but you can reduce disputes about whether a loss was real and how it should be treated.
Taxes and reporting responsibilities
Canada taxes crypto transactions, and tax outcomes can affect net family property discussions.
A prenup can address:
- Who is responsible for tracking adjusted cost base (ACB)
- Who pays tax on dispositions if crypto is separate
- How to handle tax arising from trading, staking, or airdrops
Note: Your lawyer may suggest coordinating with an accountant who understands crypto.
Province-specific notes: Ontario, British Columbia, Alberta, Quebec
Canadian family law is provincial, and the way property is divided on separation is not identical across the country. Your prenup should be drafted for the province where you live and expect it to apply.
Ontario: crypto and “net family property”
In Ontario, married couples often deal with equalization of net family property under the Family Law Act. Very generally, spouses keep property in their own name, but the increase in net worth during marriage can be equalized.
How this interacts with crypto:
- A prenup can help define whether crypto is excluded, and how growth is treated.
- Ontario has special rules around the matrimonial home that do not map neatly onto crypto, but your overall plan should consider both crypto and real estate.
Ontario marriage contracts commonly rely on strong financial disclosure and Independent Legal Advice (ILA) to improve enforceability.
British Columbia: Family Law Act and division of family property
In BC, the Family Law Act uses concepts like family property and excluded property. A prenup (marriage agreement) can clarify whether crypto is:
- Excluded property (for example, brought into the relationship)
- Family property (acquired during the relationship)
- How increases in value of excluded crypto are treated
BC couples often benefit from clearly documenting:
- The date crypto was acquired
- The wallet or exchange history that shows it was pre-relationship
Alberta: marital property rules and agreements
Alberta has its own legislation and approach to property division and agreements. A prenup can clarify the treatment of crypto and can be particularly important where there is:
- A business funded by crypto
- Active trading income
- Significant pre-marriage holdings
As with other provinces, enforceability often turns on full disclosure, fairness, and ILA.
Quebec: marriage regimes and contracts
Quebec is distinct. Couples may be subject to a matrimonial regime (often the partnership of acquests unless another regime is chosen). A marriage contract can select a regime and set terms.
For crypto holders in Quebec, it is especially important to work with a Quebec family lawyer (and often a notary) to ensure the contract matches the legal framework.
Common crypto prenup scenarios (practical examples)
These examples show why the details matter.
Scenario 1: One partner owns Bitcoin before marriage
- They bought 2 BTC in 2017.
- Value at marriage: $80,000
- Value at separation: $300,000
A prenup can specify whether:
- The entire 2 BTC and its growth stays separate
- The 2 BTC is separate, but growth ($220,000) is shared in some way
- A fixed amount is excluded, and the rest is treated as family property
Scenario 2: Crypto purchased during marriage using joint income
- Partners buy $1,000/month of ETH from a joint account.
A prenup can state:
- Those purchases are joint property, regardless of whose exchange account holds them
- Or the parties keep separate investment accounts, and only accounts funded from joint income are shared
Scenario 3: Staking rewards and airdrops during marriage
- One partner stakes SOL and receives regular rewards.
- They also receive a surprise airdrop.
A prenup can clarify:
- Rewards and airdrops follow the character of the underlying asset
- Or they are treated as income earned during the marriage and shared
Scenario 4: NFTs purchased pre-marriage, sold during marriage
- One partner bought an NFT before marriage.
- They sell it during marriage for a large gain and convert to cash.
Without clear terms, this can become a dispute about:
- Whether the proceeds are still separate
- Whether converting to cash and using it for joint expenses changes the classification
A prenup can set a rule for tracing and what happens when separate assets are converted.
How to disclose crypto in a prenup without compromising security
Disclosure is essential, but you should not create a security risk.
Common disclosure methods include:
- Exchange statements showing balances and transaction history
- Wallet address lists (public addresses only), with on-chain verification
- Third-party portfolio reports (read-only tools)
- A sworn statement summarizing holdings, with supporting documents
Security best practices (discuss with your lawyer):
- Do not include seed phrases, private keys, or backup codes in the agreement
- Use read-only access where possible
- Consider providing documents through secure sharing methods
- Keep a record of what was disclosed and when
What a prenup can and cannot do for crypto in Canada
What a prenup can do
A prenup can often:
- Clarify whether crypto is separate or shared
- Set rules for increases in value, income, and new acquisitions
- Establish valuation methods and record-keeping expectations
- Reduce uncertainty and conflict by setting clear terms
What a prenup cannot reliably do
Depending on the province and circumstances, a prenup may not be able to:
- Override certain statutory rights or public policy concerns
- Eliminate the need for full disclosure
- “Hide” assets without risking the agreement being challenged
- Replace proper legal advice and ILA
If a prenup is unfair, rushed, or signed without adequate disclosure or ILA, it may be vulnerable.
Enforceability factors for crypto prenups in Canada
Crypto adds complexity, but the enforceability themes stay consistent.
Key factors that often matter include:
- Full and honest financial disclosure (including wallets, exchanges, and major transactions)
- Independent Legal Advice (ILA) for both partners
- Time and process: not signed the night before the wedding
- Clarity: precise definitions, valuation methods, and schedules
- Fairness at the time of signing and potentially at enforcement, depending on provincial law and facts
Actionable tip: Treat the crypto schedule like a financial statement. If it is sloppy or incomplete, you increase the risk of future disputes.
How to talk to your partner about crypto and a prenup
This conversation is often easier when you frame it as planning, not suspicion.
Try:
- “I want us to be clear about our finances, including my crypto, so we are both protected.”
- “Crypto is volatile and complicated. I would rather agree now on how we handle it than fight later.”
- “We can decide together what is separate, what is shared, and how we manage future investing.”
Practical steps:
- Start early, ideally months before the wedding
- Share a high-level overview first (what you own, where it is held)
- Agree on goals: fairness, transparency, and future flexibility
- Commit to ILA for both partners
Costs: what it may take to do a crypto-aware prenup properly
Costs vary by province, complexity, and lawyer. Crypto can increase costs because it requires more time for:
- Disclosure review
- Drafting detailed schedules
- Valuation language
- Negotiation around growth, staking, and active trading
Even if you start with a template, you should budget for each partner to get Independent Legal Advice.
Checklist: how to prepare for a prenup involving crypto
Use this before you generate a draft or meet a lawyer.
Crypto inventory
- List each exchange account and custody provider
- List wallets (hardware, software, multisig)
- Note which assets you hold (coins, tokens, NFTs)
- Identify DeFi positions, staking, and lending
Documentation
- Download exchange statements and transaction history
- Save wallet addresses and on-chain proof (where appropriate)
- Capture a snapshot of holdings close to the date of disclosure
Decisions to make with your partner
- Separate vs shared for premarital holdings
- Treatment of growth
- Treatment of purchases during marriage
- Treatment of staking rewards, airdrops, forks
- Valuation method at separation
- Co-mingling rules and tracing expectations
Process
- Leave time for negotiation
- Ensure both partners get ILA
- Keep everything organized and consistent
FAQ: What happens to your crypto in a prenup?
How do I list crypto in a prenup without revealing my private keys?
You generally list accounts, wallet types, public addresses (if appropriate), and holdings, supported by statements or on-chain proof. You typically do not share private keys or seed phrases. Your lawyer can help structure disclosure securely.
Can a prenup keep my Bitcoin separate if I bought it before we met?
Often, a prenup can specify that premarital Bitcoin remains separate, but enforceability depends on provincial law, full disclosure, fairness, and both partners receiving Independent Legal Advice (ILA).
What about crypto gains during the marriage?
Your prenup can explicitly address whether gains on premarital holdings are excluded or shared, and how crypto acquired during marriage is treated. Without clear language, gains can become a major dispute point.
Are staking rewards considered income in Canada for prenup purposes?
Staking rewards can behave like income, but how they are treated in a prenup is a matter of agreement and drafting, within the limits of provincial law. Many couples choose a rule where rewards follow the underlying asset’s classification, but you should confirm with a family lawyer.
Will a prenup protect me if my partner says I hid crypto?
A prenup is more defensible when you provide complete and organized disclosure. Crypto disputes often involve allegations of non-disclosure. Keeping strong records and ensuring ILA helps reduce that risk.
Legal disclaimer
This article provides general information about what happens to your crypto in a prenup in Canada. It is not legal advice. Prenuply AI Inc. is not a law firm and does not provide legal services or legal advice. Prenuply is a technology company, not a legal services provider. For advice about your specific situation, consult a qualified family lawyer in your province. Independent Legal Advice (ILA) is essential for enforceable prenups in Canada.