Staking reward fair market value is the US dollar value of a staking reward at the moment it becomes yours. It is the price a willing buyer would pay a willing seller for the units at that time, and for a traded token it is read from the market at the reward's timestamp.
Every reward has a timestamp, a quantity and a token, and the value is the quantity multiplied by the token's USD price at that timestamp. For a token with deep markets the price is easy to obtain and the difficulty is scale: a validator paid per epoch generates thousands of timestamps a year, each needing its own price. For a token with thin or no markets the difficulty is the price itself, and a reward in a token nobody trades has a value that must be supported rather than looked up.
Prices also differ by source. An exchange's own trade price, an aggregator's volume-weighted average and a daily close can all be defensible and can all differ for the same minute. A reward's value is set at its own timestamp, not at the day's close and not at the point the reward was later claimed, withdrawn or sold.
It is the fair market value in US dollars at the time the taxpayer gains dominion and control over the reward, which under Revenue Ruling 2023-14 is the amount included in gross income. Notice 2014-21 gives the method: a digital asset listed on an exchange is valued by converting it to US dollars at the exchange rate, established by market supply and demand, in a reasonable manner that is consistently applied.
Reasonable and consistent are the operative words. Any recognised price source that reflects actual trading can be reasonable; switching between sources reward by reward is not consistent. Choose one source, apply it to every reward for the year, and keep the record of what it was. Where a token has no reliable market price at the reward's timestamp, the value has to be supported another way, by the nearest trade, the price of the asset it is redeemable for, or a documented estimate, and the support is what makes the figure defensible.
The figure does double duty. It is the income for the year, and it is the cost basis of the reward units, so the same number has to appear on the income side now and on the disposal side later. The value of a locked reward is measured when the lock ends, not when the units were credited, because that is when control arises.
The records that support the value: the timestamp of control, the quantity, the price source, the price and the USD result, kept per reward and reconcilable to the annual income total.
A reward token with no price. Incentive tokens and small-chain staking rewards often have no price feed in the software at the reward's timestamp, and the import fills in zero. The income for the year is understated by the whole value of those rewards, and the units carry a zero basis, so when they are later swapped for a token that does have a price the full proceeds are booked as gain. The value is taxed as capital gain in the year of the swap instead of as ordinary income in the year it was received.
Read our Are Crypto Staking Rewards Taxed? Yes, Here's How in 2026
CountDeFi provides done-for-you crypto tax accounting, including reward valuation, price source records and multi-chain activity. See pricing.