Why Do FAR Leases and Bonds Feel Like the Same Math?
Part of the underlying math is similar. Both can involve present value, interest, payment streams, amortization, and carrying amounts. Use the similarity without pretending the accounting rules are identical.
The common backbone
Start with a present value, apply an interest rate to a carrying amount, separate interest from principal or liability reduction, and update the carrying amount. That process appears repeatedly.
Bond thinking
Track cash interest, interest expense, discount or premium amortization, and the updated carrying value. A consistent effective-interest table makes the process much easier.
Lease-liability thinking
Track beginning lease liability, interest, cash payment, reduction of the liability, and ending lease liability. Again, an amortization table helps.
Why candidates mix the topics
The mathematical structure overlaps, but the financial statement presentation and accounting requirements can differ. Do not transfer every rule from one topic into the other.
Make separate templates
Bond: beginning carrying value × effective rate = interest expense, then compare to cash interest.
Lease: beginning liability × applicable rate = interest, then compare to the lease payment.
Learn the journal entry after the table
Do not memorize the journal entry before understanding what the amortization table calculated. The entry should become a summary of the economics.
The takeaway
Leases and bonds share amortization logic. They do not share every accounting rule.
Related Summit guides
FAQ
Should I memorize amortization tables?
Learn how to rebuild them quickly rather than relying on visual memory alone.
Why do I reverse premium and discount logic?
Tie the carrying value movement back to the relationship between coupon rate and market rate.
Are lease and bond SIMs worth practicing?
Yes. Longer calculations expose process mistakes quickly.