Bonds Payable & Effective Interest Method — CPA FAR Guide
Bonds Payable and the Effective Interest Method for the CPA FAR Exam
Bond amortisation is one of the topics FAR reviewers name among the hardest — not because the concept is complex, but because a single wrong rate or wrong direction throws off every period that follows. Here is how the effective interest method works, a full worked amortisation schedule, and the traps that decide the simulation.
By CA Vicky Sarin (ICAI), founder of Eduyush · Last updated 2 July 2026 · Mapped to the AICPA 2026 FAR Blueprint
The effective interest method recognises interest expense each period as the bond's carrying value multiplied by the market rate at issuance, not the stated coupon rate. The difference between effective interest expense and the cash interest paid amortises the discount or premium, moving the carrying value toward face value by maturity. US GAAP requires the effective interest method unless the straight-line result is not materially different.
- A bond issues at a discount when the stated rate is below the market rate, and at a premium when the stated rate is above it. At par, the two rates match.
- Interest expense is carrying value × market rate — not face value × stated rate. Only the cash paid uses the stated rate.
- Discount bonds show rising interest expense each period; premium bonds show falling interest expense. The direction is a fast sanity check on any amortisation table.
- Debt issuance costs are no longer a separate asset. Under ASU 2015-03 they are a direct deduction from the carrying amount of the liability, amortised through the effective rate.
- Bonds connect directly to the statement of cash flows, where interest paid is an operating outflow regardless of the amortisation method used to compute expense.
Why bonds are priced at a discount or premium
A bond's stated (coupon) rate is fixed at issuance and printed on the certificate. The market rate is what investors currently demand for debt of similar risk and maturity. These two rates rarely match on the day the bond is sold, and the gap is what creates a discount or a premium.
| Relationship | Bond sells at | Why |
|---|---|---|
| Stated rate < market rate | Discount | Investors will not pay face value for below-market cash interest — the price falls until yield matches the market |
| Stated rate = market rate | Par (face value) | The coupon already delivers the market-required yield |
| Stated rate > market rate | Premium | Investors pay extra up front for above-market coupon payments |
The issue price is the present value of the face amount plus the present value of the coupon annuity, both discounted at the market rate. The stated rate only determines the size of the coupon payment; it never enters the discounting calculation.
The effective interest method, step by step
Worked example: a 5-year discount bond
A company issues bonds with a face value of 100,000, a stated rate of 6% paid annually, and a market rate of 8% at issuance. Because the stated rate is below the market rate, the bond issues at a discount for 92,014. This is the exact shape a FAR simulation takes — issue price given or derivable, then the first two periods of the schedule.
| Period | Beginning carrying value | Interest expense (× 8%) | Cash paid (× 6%) | Discount amortised | Ending carrying value |
|---|---|---|---|---|---|
| Year 1 | 92,014 | 7,361 | 6,000 | 1,361 | 93,375 |
| Year 2 | 93,375 | 7,470 | 6,000 | 1,470 | 94,845 |
| Year 5 (maturity) | … | … | 6,000 | … | 100,000 |
Notice interest expense rises each period — 7,361, then 7,470 — even though cash paid stays fixed at 6,000. That is the discount bond signature: expense grows toward the cash payment as the discount shrinks and the carrying value climbs toward face value. A premium bond runs the opposite direction. If your schedule shows expense moving the wrong way for the bond type, the market-versus-stated rate has been swapped somewhere upstream.
Build every amortisation table left to right in the same five-column order — beginning balance, interest expense, cash paid, amortisation, ending balance — even under exam pressure. The ending balance of one row is always the beginning balance of the next. Skipping straight to "the answer" is where candidates lose the thread on multi-period simulations.
Debt issuance costs: the ASC 835 trap
Legal, underwriting and registration fees incurred to issue a bond used to be capitalised as a separate deferred asset and amortised on its own schedule. ASU 2015-03 changed this: debt issuance costs are now presented as a direct deduction from the carrying amount of the bond liability — the same treatment as a discount — and are amortised through the effective interest rate together with any discount or premium.
Materials written before ASU 2015-03 (effective for fiscal years beginning after 15 December 2015) will show issuance costs as a deferred asset. That presentation is wrong under the current standard. On FAR, issuance costs reduce the bond's carrying value on day one and are folded into the same effective interest calculation as the discount — never amortised on a separate straight-line schedule.
The bond accounting trap table
These are the errors that decide a bonds payable simulation. Bookmark this table.
| Trap | Wrong instinct | Correct treatment |
|---|---|---|
| Interest expense uses the stated rate | Face value × stated rate | Beginning carrying value × market rate at issuance |
| Straight-line applied by default | Divide discount evenly by number of periods | Effective interest required unless the difference from straight-line is immaterial |
| Issuance costs treated as an asset | Capitalise as deferred financing costs | Deduct directly from the bond's carrying amount (ASU 2015-03) |
| Discount bond expense assumed flat | Same interest expense every period | Expense rises each period as carrying value grows toward face value |
| Market rate reused after issuance | Recalculate expense using today's market rate | The rate at issuance is locked for the life of the bond, absent a modification or extinguishment |
| Gain/loss on early retirement ignored | Assume retirement at carrying value with no gain or loss | Compare reacquisition price to carrying value at the retirement date; the difference is a gain or loss in income |
Bonds and debt covenants
FAR's Area II also tests debt covenant compliance alongside the amortisation mechanics — lenders frequently attach financial ratio covenants (debt-to-equity, interest coverage) to bond agreements, and a violation can trigger reclassification of long-term debt to current if the lender has the right to demand immediate repayment. This is a balance sheet classification question that sits directly downstream of the same carrying value you compute in the amortisation schedule above.
A common FAR variant combines the amortisation schedule with a classification question: "given the carrying value at year-end, is the debt current or long-term?" Get the carrying value right using the five-column method above, then apply the covenant facts — the two parts of the question depend on each other in sequence.
How Indian candidates should approach this topic
CA and ACCA candidates already know present value and effective interest mechanics from financial instruments coursework — the calculation logic transfers directly. The adjustment is narrower than it looks: US GAAP's mandatory effective interest method (versus IFRS, which also requires effective interest but candidates sometimes confuse with amortised cost terminology) and the ASC 835 issuance-cost presentation are the two places precision matters most on FAR.
Surgent's simulation bank drills the amortisation schedule as a five-column build, not a plug-in formula — matching the exact task-based simulation format the AICPA uses for bonds, and pairing it with the debt covenant classification question that often follows. Its ReadySCORE flags whether bond amortisation is a genuine strength before exam day. See the platform in our Surgent CPA Review India guide, or start with the Surgent CPA course.
Bond amortisation is arithmetic wrapped around one idea: interest expense follows the carrying value and the market rate, cash follows the coupon and the stated rate, and the gap between them amortises the discount or premium until the two converge at face value. Fix the five-column structure and the topic stops being a memory exercise.
Frequently asked questions
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