A fair value adjustment journal entry brings an asset or liability on the balance sheet up or down to its current market price and books the difference as an unrealized gain or loss. One side of the entry moves the carrying value; the other records the gain or loss. Where that gain or loss lands, either net income or other comprehensive income (OCI), depends entirely on how the instrument is classified.
The Two Sides of the Entry
Every fair value adjustment has the same skeleton. You compare the instrument’s carrying value from the prior period to its newly determined fair value, and the difference is the amount you post. If an available-for-sale debt security carried at $10,500 has dropped to $10,200, the unrealized loss is $300. If it rose to $10,750, the unrealized gain is $250. That net figure is the entry.
Fair value under ASC 820 is an exit price: what you would receive to sell the asset or pay to transfer the liability in an orderly transaction between market participants at the measurement date. Your intent to hold or sell doesn’t change the number.
What changes across instruments is the destination of the offsetting gain or loss:
- Trading securities, equity investments, and non-designated derivatives route through net income.
- Available-for-sale (AFS) debt securities route through OCI.
- Derivatives designated as hedges follow specific rules based on hedge type.
- Financial liabilities under the Fair Value Option split between the two, based on cause.
Held-to-maturity debt securities are the exception. They stay at amortized cost, with fair value shown only in the footnotes, so no adjustment entry is booked for market movements.1Financial Accounting Standards Board. IASB and FASB Issue Common Fair Value Measurement and Disclosure Requirements
Trading Securities and Equity Investments
Trading securities are debt or equity instruments held with the intent to sell in the near term. Their fair value changes hit net income each period. Since ASU 2016-01, equity securities with readily determinable fair values (outside the equity method or consolidation) follow the same treatment, even when the company has no plan to sell them soon. The old AFS category for equities is gone.
If a trading security’s fair value increases by $5,000:
| Account | Debit | Credit |
|---|---|---|
| Financial Asset (Trading) | $5,000 | |
| Unrealized Gain on Trading Securities (P&L) | $5,000 |
If the same security drops by $2,000:
| Account | Debit | Credit |
|---|---|---|
| Unrealized Loss on Trading Securities (P&L) | $2,000 | |
| Financial Asset (Trading) | $2,000 |
The entry for a $3,000 gain on an equity investment looks the same:
| Account | Debit | Credit |
|---|---|---|
| Equity Investment | $3,000 | |
| Unrealized Gain on Equity Securities (P&L) | $3,000 |
Because the gain or loss hits earnings immediately, portfolios of this type can produce significant income volatility quarter to quarter.
Available-for-Sale Debt Securities
AFS debt securities are debt instruments that are neither held for near-term sale nor classified as held-to-maturity. Their unrealized gains and losses bypass net income and go to OCI, which then accumulates in Accumulated Other Comprehensive Income (AOCI) within equity. The point is to shield reported earnings from period-to-period market swings on instruments the company doesn’t intend to sell.
A $7,000 unrealized gain on an AFS debt security:
| Account | Debit | Credit |
|---|---|---|
| Financial Asset (AFS) | $7,000 | |
| Unrealized Gain on AFS Securities (OCI) | $7,000 |
A $1,500 unrealized loss:
| Account | Debit | Credit |
|---|---|---|
| Unrealized Loss on AFS Securities (OCI) | $1,500 | |
| Financial Asset (AFS) | $1,500 |
Reclassification When the Security Is Sold
The accumulated gains and losses sitting in AOCI don’t stay there forever. When the AFS security is sold, the accumulated amount reclassifies out of AOCI and into net income. If a security has $4,200 of accumulated gains in AOCI at the sale date:
| Account | Debit | Credit |
|---|---|---|
| Unrealized Gain—AFS Securities (AOCI) | $4,200 | |
| Realized Gain on Sale of AFS Securities (P&L) | $4,200 |
This runs alongside the normal sale entry that removes the security from the books and records the cash proceeds. It’s the mechanism by which AFS gains and losses eventually reach net income even though they skip it during the holding period.
Derivatives
All derivatives sit on the balance sheet at fair value. What differs is where the offsetting gain or loss goes, and that depends on whether the derivative has been formally designated as a hedge under ASC 815.
Derivatives Not Designated as Hedges
Without a hedge designation, fair value changes run straight through the income statement. If a derivative asset increases in value by $10,000:
| Account | Debit | Credit |
|---|---|---|
| Derivative Asset | $10,000 | |
| Gain on Derivative (P&L) | $10,000 |
If a derivative liability grows by $4,000, the obligation has increased and the company records a loss:
| Account | Debit | Credit |
|---|---|---|
| Loss on Derivative (P&L) | $4,000 | |
| Derivative Liability | $4,000 |
An interest rate swap that is economically hedging something but hasn’t been formally designated will be marked to market this way, with the full gain or loss running through earnings each period.
Fair Value Hedges
In a fair value hedge, the company is hedging the risk that an asset or liability’s fair value will change. Both the derivative and the hedged item are adjusted to fair value through earnings in the same period. If a designated interest rate swap gains $8,000 while the hedged bond loses $8,000, the two entries largely offset in P&L. Any difference between them, hedge ineffectiveness, remains in earnings.
Cash Flow Hedges
In a cash flow hedge, the company is hedging variability in future cash flows, such as a forecasted purchase or variable-rate interest payments. The effective portion of the derivative’s gain or loss goes to OCI rather than earnings, then reclassifies into net income in the same period the hedged transaction affects earnings. An option contract used to hedge a forecasted inventory purchase sits in OCI until the inventory is eventually sold, at which point the deferred amount reclassifies into cost of goods sold.
Liabilities Under the Fair Value Option
Companies can elect the Fair Value Option (FVO) for financial instruments that would otherwise be carried at amortized cost, such as certain loans receivable or debt obligations. The election is made instrument by instrument, is irrevocable, and must cover the entire instrument.2Deloitte Accounting Research Tool. Debt Subject to the Fair Value Option
For a liability under the FVO, subsequent fair value changes split by cause:3Deloitte Accounting Research Tool. Fair Value Option
- Changes from market factors (like shifting benchmark interest rates) flow through net income.
- Changes from the company’s own credit risk go to OCI.
The own-credit-risk carve-out prevents a perverse outcome: without it, a company whose creditworthiness deteriorates would report a gain in net income because the market value of its debt fell, making the financials look better precisely when things are getting worse.
Suppose a bond liability’s total fair value decreases by $8,500. Of that, $6,000 stems from rising market interest rates, and $2,500 from a widening credit spread on the company’s own debt:
| Account | Debit | Credit |
|---|---|---|
| Bonds Payable (FVO) | $8,500 | |
| Unrealized Gain on Liability (P&L) | $6,000 | |
| Unrealized Gain on Liability—Own Credit Risk (OCI) | $2,500 |
The debit reduces the liability balance to fair value, and the two credits route each component to its required destination.
Deferred Tax on the Adjustment
A fair value adjustment usually creates a temporary difference between book basis and tax basis. Marking a security up to fair value while its tax basis stays at original cost creates a taxable temporary difference and a deferred tax liability. A mark-down below tax basis creates a deductible temporary difference and a deferred tax asset.
The rule to remember: the deferred tax effect follows the pretax gain or loss to the same location.
- For trading securities, equity investments, and non-designated derivatives, the pretax gain or loss runs through net income, so the deferred tax expense or benefit hits the income tax line on the income statement.
- For AFS debt securities, the pretax gain or loss goes to OCI, so the deferred tax effect is also charged or credited to OCI, not to income tax expense.
Skipping the deferred tax component is a common error. A $7,000 unrealized gain on an AFS security recorded in OCI needs a deferred tax liability booked in OCI as well. At a 21% corporate tax rate, that’s $1,470 debited to OCI and credited to a deferred tax liability. Omit it and AOCI is overstated while the deferred tax balance is understated.
Confirming the Amount Before You Post
Before you write the entry, confirm two things. First, that the fair value you’re using is defensible under the ASC 820 hierarchy: a Level 1 instrument uses the quoted price in an active market with no adjustment; a Level 2 measurement leans on observable inputs for similar instruments; a Level 3 measurement relies on management’s own model inputs and draws the heaviest scrutiny.4SEC.gov. Note 10 – Fair Value Measurements Second, that you’ve identified the classification correctly, because the destination of the offsetting entry depends on it. A misclassified security won’t be caught by the mechanics of the journal entry itself; it will show up later as gains and losses landing in the wrong statement.
Once the classification and the fair value are settled, the entry writes itself: adjust the carrying value on one line, book the unrealized gain or loss on the other, and route the tax effect to match.