Five years ago, a company recognized an asset retirement obligation of $200,000, the present value of estimated dismantlement costs discounted at the 6% credit-adjusted risk-free rate in effect for the company at that time. This year, based on updated engineering estimates, the company revises upward its estimate of the undiscounted future dismantlement cash flows, adding a new $150,000 layer of expected cost. The company's current credit-adjusted risk-free rate, reflecting its creditworthiness and prevailing rates today, is 9%. Under ASC 410-20, at what rate should the company discount this upward revision to measure the additional liability layer?
- The current 9% credit-adjusted risk-free rate, because ASC 410-20 requires an upward revision in estimated cash flows to be treated as a new liability layer, discounted at the credit-adjusted risk-free rate in effect at the time the revision is recognized, while the original $200,000 layer continues to accrete at the original 6% rate
- The original 6% credit-adjusted risk-free rate used five years ago, because all layers of a single asset retirement obligation for the same asset must be discounted at one consistent rate fixed at initial recognition
- A blended rate that weights the 6% original rate and the 9% current rate by the relative size of the original and new liability layers, recalculating the entire obligation each time a revision occurs
- Whichever of the 6% or 9% rate is lower, since ASC 410-20 requires the more conservative, lower discount rate to be used whenever cash flow estimates are revised upward
Why A? And why not the others?
Correct answer: A. The current 9% credit-adjusted risk-free rate, because ASC 410-20 requires an upward revision in estimated cash flows to be treated as a new liability layer, discounted at the credit-adjusted risk-free rate in effect at the time the revision is recognized, while the original $200,000 layer continues to accrete at the original 6% rate
ASC 410-20 measures upward revisions to the estimated undiscounted cash flows of an asset retirement obligation as new, separate layers of the liability, each discounted at the credit-adjusted risk-free rate that is current as of the date the revision is recognized, rather than reopening or blending the rate used for previously recognized layers. Here the original $200,000 obligation, recognized five years ago at the then-current 6% rate, keeps accreting at that original 6% rate, while the new $150,000 layer of increased expected cost is discounted at today's current 9% rate and accretes separately at 9% going forward. Requiring one consistent rate fixed at initial recognition for all future revisions ignores that the layered approach exists precisely so that each layer reflects the rate conditions prevailing when that layer's cash flow estimate was added. Blending the two rates by relative layer size invents a weighted-average mechanism the standard does not use; layers are tracked and accreted separately, not merged into a single recalculated rate. Selecting whichever rate is lower for conservatism has no basis in ASC 410-20 — downward revisions, not upward ones, are the case where the original historical rate is reused, and even then it is because that layer is being reduced, not because a lower rate is inherently more conservative.
Source: FASB ASC 410-20-35-8 (upward revisions to estimated cash flows of an asset retirement obligation are discounted at the current credit-adjusted risk-free rate as a new liability layer; downward revisions use the rate in effect when the corresponding layer was initially recognized)