Recording Crypto Cost Basis for Household Purchases
A practical household guide to logging crypto purchases, applying general IRS basis and holding-period rules, and knowing what the source does not cover.
The most useful way to record cost basis for household crypto purchases is to log the date, amount paid, quantity received, and fees as they happen, then treat each purchase as its own line in a running ledger. This article applies general IRS capital-asset rules to that habit. One caveat up front: the source page addresses capital assets generally and never names cryptocurrency, so applying it to crypto is this article's inference and should be confirmed against current guidance.
What the general rule says
The source states that almost everything you own and use for personal or investment purposes is a capital asset (c01), with examples including a home, household furnishings, and stocks or bonds held as investments (c02). When you sell a capital asset, the difference between your adjusted basis and what you realized is a capital gain or loss (c03). The source says an asset's basis is generally its cost to the owner, but points to Publication 551 for gifts and inheritances (c04).
A gain arises when the sale price exceeds adjusted basis (c05); a loss arises when it falls below (c06). The source also notes that losses from the sale of personal-use property, such as a home or car, are not tax deductible (c07).
Short-term versus long-term, and why the date matters
To reach a net capital gain or loss, the source says gains and losses are classified as long-term or short-term (c08). Generally, holding more than one year makes the result long-term (c09); holding one year or less makes it short-term (c10). The source points to Publication 544 for exceptions such as gifts, property acquired from a decedent, and patent property, and notes that other categories follow their own publications: commodity futures are directed to Publication 550, and partnership interests to Publication 541 (c11).
To determine holding time, the source says you generally count from the day after the day you acquired the asset up to and including the day you disposed of it (c12). This is the detail a household ledger should make easy: the acquisition date you record is the anchor for that count.
A ledger format that fits a household
The following columns are recommended household practice, not rules drawn from the source. They are organized so the sourced concepts—basis and holding period—map to entries you can actually keep.
- Acquisition date, entered on the day of purchase.
- Amount paid, including fees, in the unit you actually paid in.
- Quantity received and the asset's name or ticker.
- Account or wallet where the asset landed.
- Disposal date and proceeds when a sale occurs.
- A backup copy kept with household financial records.
Keeping one ledger rather than scattered exchange screenshots helps because the source's basis rule depends on cost (c04), and the holding rule depends on dates (c12).
A worked household example
The following figures are Hypothetical and exist only to show how the sourced rules would be applied to recorded entries. Suppose a household bought one unit for $1,000 on January 10 of one year, and another unit for $1,500 on March 3 of the same year, recording both in the ledger above. Suppose further that one unit was later sold for $1,800 on February 15 of the following year.
Applying the source's counting method (c12) to these hypothetical dates would place the January 10 purchase in the long-term bucket (c09), since the sale date falls more than one year after that purchase. The gain depends entirely on which unit the household treats as sold; the source does not cover unit-identification methods. Hypothetically assuming the household uses specific identification and treats the January 10 unit as sold, the difference between the $1,800 proceeds and that unit's $1,000 basis (c03) would be $800, treated as long-term (c09).
| Item | Hypothetical entry |
|---|---|
| First purchase | January 10, one unit, $1,000 |
| Second purchase | March 3, one unit, $1,500 |
| Sale | February 15 of the following year, one unit, $1,800 |
| Assumed identified unit | January 10 unit, basis $1,000 (specific identification assumed) |
| Resulting difference | $800, long-term under the counting method (c09, c12) |
The same sale identified against the March 3 unit would produce a different number. That is not a tax conclusion, just a demonstration that the household's identification assumption drives the arithmetic, and the source does not resolve it.
Why the classification can matter
The source says the term "net capital gain" means the amount by which your net long-term capital gain for the year is more than your net short-term capital loss for the year (c14). It defines net long-term capital gain as long-term gains reduced by long-term losses, including unused carryovers (c15), and net short-term capital loss as short-term losses exceeding short-term gains for the year (c16). If you have a net capital gain, a lower rate may apply than your ordinary-income rate (c13). The source notes rates vary with overall taxable income, with some or all net capital gain possibly taxed at 0% (c17), and that for taxable years beginning in 2025, the rate on most net capital gain is no higher than 15% for most individuals (c18).
What the source does not say
The source does not mention cryptocurrency, so nothing above should be read as an IRS statement about crypto specifically. It does not explain unit-identification methods, valuation of purchases made in another currency, wallet transfers between accounts, or how fees are treated. It does not address record retention, reporting platforms, or how a household should allocate assets between spouses or family members. It also does not resolve every exception to the one-year rule; for those it points to Publications 544, 550, and 541 as noted (c11).
A short checklist before selling
This checklist is recommended practice. Before any sale, confirm the ledger shows the acquisition date, cost including fees, quantity, and account for each unit. Check the disposal date against the counting method (c12). Decide, with current guidance, how units will be identified, since the source leaves that open. Then line up the results with how gains and losses are netted (c14, c15, c16).
Sources
Informational only. Not financial, legal or investment advice. Check the primary sources listed above before you act on anything here.