Crypto Cost Basis Methods: FIFO, HIFO and Specific ID Explained

Crypto Cost Basis Methods: FIFO, HIFO and Specific ID Explained

You bought the same coin five times at five prices, then sold part of it. Which purchase did you sell? The answer sets your gain, and the tax code does not let you pick it by feel. That choice is what crypto cost basis methods are for.

The short answer: a cost basis method is the rule that matches units sold with units bought. FIFO matches the oldest first, specific identification lets you pick lots, and HIFO is one way to pick them. What you can use depends on your records.

The featured firm is Crypto Tax Made Easy, based in Little Silver, New Jersey. Crypto Tax Made Easy is a paid featured member of Sam's List.

What Crypto Cost Basis Methods Actually Decide

Your gain is the sale price minus the basis of the units you sold, and basis is generally what you paid, including fees. When you bought at different prices on different days, each purchase is a lot, and the method decides which lots a sale uses up.

That changes the size of the gain and whether it is short term or long term, because holding period follows the lot. An old, cheap lot gives a large long-term gain. A recent, expensive lot may give a small short-term one.

The limitation: a method is not a loophole. It decides which of your real purchases you sold, and it must match what your records can prove.

FIFO: The Default When You Do Not Identify Lots

FIFO means first in, first out. The oldest units you own are treated as sold first. Under the Treasury rules for digital assets, if you do not adequately identify the units you sell, FIFO is generally the fallback. It is not a choice you made. It is what applies when you made none.

FIFO often produces large gains, since the oldest lots usually carry the lowest basis, though they tend to be long term.

The limitation: FIFO is the default only where the rules provide it, and the rules on digital assets have been revised more than once. Some exchanges and software apply their own default, which may not match what your return should show.

Specific Identification Crypto: Choosing Lots and Proving It

Specific identification crypto means you tell the system which lots you are selling at the time of the sale, instead of letting FIFO decide.

The record requirements are the catch. In general, you must identify units by details such as acquisition date, cost and quantity, and be able to show you made that identification no later than the time of the sale or transfer. A spreadsheet built months later to reverse-engineer a result does not count.

That means lot-level records for every wallet and exchange. Some exchanges let you select lots at the point of sale. Self-custody wallets usually do not, so record the identification elsewhere, on time.

The limitation: control comes with the burden of proof. Lots you cannot document may fall back to the default, and what counts as adequate identification is worth confirming with a tax professional.

HIFO vs FIFO: HIFO Is a Way of Picking Lots

HIFO means highest in, first out: you sell the highest-basis lot first, which tends to produce the smallest gain or largest loss on that sale. HIFO is better understood as a lot-selection strategy used under specific identification than as a separate method.

That is the real difference in HIFO vs FIFO. FIFO happens to you when you identify nothing. HIFO is something you do, and it works only if you identify the high-basis lots at the time of sale and keep the records.

The limitation: HIFO does not make tax disappear. It leaves your lowest-basis units unsold, so the bigger gain is still waiting. Whether that is good depends on future rates, your income and your plans for the coins.

Per-Wallet Tracking and Consistency

For years many investors treated all their crypto as one pool across wallets and exchanges. Recent IRS guidance moved toward tracking basis wallet by wallet, or account by account. Here is what that means for your method.

Each wallet needs its own lot history. Moving coins between wallets is a transfer, not a sale, but the lots and their basis must travel with them in your records. Many people lose basis here, and the coins look like a zero-basis purchase.

Apply your approach consistently and write it down. FIFO on one exchange and hand-picked lots on another, with nothing documented, is hard to defend.

The limitation: how rule changes apply to holdings you already own is a question for a professional who knows the current guidance. We skip dates because they are easy to misstate.

Broker Reporting Is Not Your Return

Exchanges and brokers are increasingly required to report digital asset sales on a new information form, and over time more report basis too. Copying that form onto your return is risky. A broker sees only its own platform, so coins moved in from elsewhere may show no basis or the wrong one. And a broker applies its own default method unless instructed otherwise, which may differ from yours.

The limitation: your return is still your responsibility, and if your figures differ from the form you generally need records that explain why. Reporting rules have been phased in and adjusted, so confirm what applies to your tax year.

When Crypto Cost Basis Methods Do and Do Not Change Your Total Tax

A method often changes timing more than total tax. If you eventually sell every unit, total basis used is the same, so total gain over the whole holding is generally the same however lots were matched. HIFO mostly pushes gain later. FIFO tends to bring it forward.

The total can change when a method shifts gain between short and long term, or into a lower-income year.

The limitation: those effects depend on your income, holding periods and rules that change, so a general article cannot say which method saves you money. Model your own numbers.

Where Crypto Tax Made Easy Fits

Crypto Tax Made Easy is based in Little Silver, New Jersey, was founded in 2021 and has 6 employees. It serves clients nationwide and lists SMB owners, VC-backed startups, real estate investors and solopreneurs among its specialties, with no stated revenue or income minimums.

Crypto Tax Made Easy has 6 verified client reviews on Sam's List as of 2026-10-02. Each review is submitted by an individual who identifies as a client of the firm and rates it on communication, subject-matter knowledge, and overall satisfaction. Reviews reflect those individual experiences and do not represent an endorsement by Sam's List. Crypto Tax Made Easy is a paid featured member of Sam's List. Ratings and rankings are not indicative of future performance or results.

The limitation, plainly: a six-person firm founded in 2021 has finite capacity and a short track record, and the profile does not say how it handles any one method. Ask how it keeps specific identification records, who prepares and who reviews, and what it charges.

Frequently Asked Questions

What is the default crypto cost basis method?

Where you do not identify the units you sold, FIFO is generally the default under the Treasury rules for digital assets, so the oldest units are treated as sold first. Your exchange or software may apply a different default of its own. Confirm what applies to your return and tax year with a tax professional.

Is HIFO a separate method from specific identification?

In practice, no. HIFO is a way of choosing lots under specific identification: you pick the highest-basis lots to sell first. It requires identifying those lots by the time of sale and keeping records that prove it. Without that, the default generally applies, whatever your software labeled the report.

Can I use a different method on each exchange?

Possibly, but consistency and records matter more than flexibility. With wallet-by-wallet tracking, each account has its own lots, and you need to document how each sale was matched. Mixing approaches with no written record is hard to defend. Ask your CPA how to apply one approach across your accounts.

Does the method I choose change my total tax?

Sometimes. If you eventually sell every unit, total gain over the whole holding is generally the same, and the method mostly changes timing. It can change the total when it moves gains between short and long term or between years with different rates. Model your own numbers first.

If you sell across several wallets and exchanges, ask a tax professional which method your records can support before the year ends. You can browse accountants on Sam's List, including the firm above.

---

About the author: Kimberly Green is cofounder of Sam’s List, a directory and matching platform for financial professionals.