Under ASC 470-50, compare the present value of the cash flows under the new terms with the present value of the remaining cash flows under the old terms, both discounted at the original effective interest rate, with fees paid to the lender included as a day-one cash flow. A difference of 10% or more is an extinguishment: derecognize the old debt, record the new debt at fair value, and take the difference to earnings. Under 10% it is a modification: no gain or loss, a new effective rate applies prospectively, lender fees adjust the carrying amount, and third-party costs are expensed. Screen for a troubled debt restructuring under ASC 470-60 before applying either model.
The modification-versus-extinguishment call is a sequence of screens, and the 10% math comes last:
ASC 470-60-15 makes a restructuring a TDR when two conditions are both met: the debtor is experiencing financial difficulty, and the creditor, for economic or legal reasons related to that difficulty, grants a concession it would not otherwise consider. Indicators of financial difficulty include payment default (or probable default absent the change), going-concern doubt, and an inability to refinance at market rates. A concession is generally present when the restructuring reduces the lender's effective return below what it would demand for new credit with similar risk, or when the lender accepts less than the amounts contractually due.
If the change is a TDR, the debtor applies the ASC 470-60-35 model: for a modification of terms, no gain is recognized unless the carrying amount of the debt exceeds the total future cash payments under the new terms measured on an undiscounted basis; otherwise the effect runs through a new effective rate prospectively. Note that ASU 2022-02 eliminated TDR accounting for creditors, but it did not touch the debtor model, so ASC 470-60 still applies to borrowers.
Everything below assumes the change is not a TDR.
ASC 470-50-40-10 deems the new and old instruments substantially different, and therefore an extinguishment, when the present value of the cash flows under the new terms is at least 10% different from the present value of the remaining cash flows under the original terms. ASC 470-50-40-12 supplies the mechanics:
Convertible debt layers additional tests on top of the cash flow math: a change in the fair value of the embedded conversion option of at least 10% of the carrying amount of the original debt immediately before the change, or adding or eliminating a substantive conversion option, can each drive extinguishment accounting on their own (ASC 470-50-40-10(a)-(b)). Those tests are beyond this guide; see ASC 470-50-40.
| Modification (change under 10%) | Extinguishment (change of 10% or more) | |
|---|---|---|
| Old debt | Stays on the books at its carrying amount | Derecognized at its net carrying amount, including unamortized discount, premium, and issuance costs |
| New debt | Not a new instrument for accounting; the carrying amount rolls forward | Recorded at fair value (ASC 470-50-40-13) |
| Gain or loss | None | Reacquisition price (fair value of the new debt plus lender fees) less the net carrying amount of the old debt, recognized currently in earnings (ASC 470-50-40-2) |
| Fees paid to the lender | Netted against the carrying amount (recorded as additional debt discount) and, together with any existing unamortized premium or discount, amortized as an adjustment of interest expense over the remaining term (ASC 470-50-40-18) | Included in the extinguishment gain or loss (ASC 470-50-40-17) |
| Third-party costs | Expensed as incurred (ASC 470-50-40-18) | Capitalized as issuance costs of the new debt and amortized over its term (ASC 470-50-40-17) |
| Go-forward interest | New effective rate that equates the adjusted carrying amount to the revised cash flows, applied prospectively (ASC 470-50-40-14) | Effective rate set by the new debt's fair value |
The fee rows are the ones practitioners get backwards. The two cost categories flip between the outcomes: lender fees are deferred in a modification but hit the gain or loss in an extinguishment, while third-party costs are expensed in a modification but capitalized in an extinguishment.
Facts: a $10,000,000 term loan, 6% fixed coupon paid annually, three years to maturity, principal due at maturity. The loan was issued at par with no issuance costs, so the effective rate for accounting purposes equals the 6% coupon and the carrying amount is $10,000,000. (In practice, unamortized costs usually push the effective rate off the coupon; solve for the rate that equated the net proceeds at issuance to the contractual cash flows.)
The amendment extends maturity to five years and raises the coupon to 7%. The borrower pays the lender a $100,000 amendment fee and pays its own counsel $40,000.
| Period | Original terms (6%, 3 years) | Amended terms (7%, 5 years) |
|---|---|---|
| Day one (fee paid to lender) | — | 100,000 |
| Year 1 | 600,000 | 700,000 |
| Year 2 | 600,000 | 700,000 |
| Year 3 | 10,600,000 | 700,000 |
| Year 4 | — | 700,000 |
| Year 5 | — | 10,700,000 |
| Present value at 6% (original effective rate) | 10,000,000 | 10,521,237 |
The change in present value is 521,237, or 5.2% of the old present value: below 10%, so this is a modification. The $40,000 of third-party legal cost never entered the test. Discounting at a current market rate instead would change both present values and the percentage, which is exactly why ASC 470-50-40-12 fixes the rate at the original effective rate.
Modification entries:
Amendment fee paid to the lender
Dr. Term loan (discount) 100,000
Cr. Cash 100,000
Borrower's own legal costs
Dr. Professional fees expense 40,000
Cr. Cash 40,000
No gain or loss is recognized. The net carrying amount is now $9,900,000 against contractual cash flows of 700,000 a year for five years plus 10,000,000 at maturity, which produces a new effective rate of roughly 7.25%, applied prospectively (ASC 470-50-40-14 and 40-18).
Change the facts: coupon to 9% and a $250,000 amendment fee, same five-year extension. The new-side present value at 6% becomes 250,000 plus 3,791,128 of coupons plus 7,472,582 of principal, or 11,513,710 in total: a 15.1% change. Extinguishment.
The old debt is derecognized at its $10,000,000 carrying amount and the new debt is recorded at fair value. Suppose the current market yield for this borrower on the new terms is 8.5%, giving the new instrument a fair value of about $10,197,000. The lender fee goes into the loss; the $40,000 of third-party costs is capitalized against the new debt:
Dr. Term loan (old) 10,000,000
Dr. Loss on extinguishment of debt 447,000
Cr. Term loan (new, at fair value) 10,197,000
Cr. Cash (fee paid to lender) 250,000
Dr. Debt issuance costs (contra to new loan) 40,000
Cr. Cash 40,000
The $197,000 premium over par amortizes through interest expense, so the new loan's carrying amount converges to par while interest accrues at the 8.5% rate used to measure fair value. Measuring that fair value is a genuine valuation exercise: a modified bank loan has no quoted price, and practice typically discounts the new contractual cash flows at a current market yield for the borrower's credit.
Revolvers and lines of credit do not run the 10% test. ASC 470-50-40-21 compares borrowing capacity, meaning maximum available credit multiplied by the remaining term, under the old and new arrangements:
A facility with both a revolver and funded term tranches is analyzed in pieces: the term loans run the 10% test and the revolving commitment runs the borrowing-capacity test. Where an amendment moves borrowings between the two, allocating fees takes judgment and firm guidance varies in emphasis, so document the approach.
The effective interest rate, for accounting purposes, of the original debt instrument (ASC 470-50-40-12): the rate on the books from original issuance, reflecting any discount, premium, or issuance costs. Using the current market rate or the new coupon is the most common error and can flip the conclusion in either direction.
They flip. In a modification, fees paid to the lender are added to the debt's carrying amount and amortized through the new effective rate, while third-party costs such as legal fees are expensed as incurred (ASC 470-50-40-18). In an extinguishment, lender fees go into the gain or loss, while third-party costs are capitalized as issuance costs of the new debt and amortized over its term (ASC 470-50-40-17).
No. ASC 470-50-40-21 uses a borrowing-capacity test instead: compare maximum available credit multiplied by remaining term before and after the amendment. If capacity is the same or greater, unamortized costs plus the new fees are deferred over the new term; if capacity shrinks, unamortized deferred costs are written off in proportion to the decrease.
Screen for a troubled debt restructuring first. If the debtor is experiencing financial difficulty and the lender grants a concession it would not otherwise consider, the change is a TDR accounted for under ASC 470-60, not ASC 470-50: generally no gain unless the carrying amount exceeds total future undiscounted cash payments. ASU 2022-02 eliminated TDR accounting for creditors, but the debtor-side model in ASC 470-60 still applies.
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