Form 3115 and the depreciation history it makes you rebuild

A client arrives with a fixed asset schedule that does not work. An improvement asset carrying a 39-year life that looks like it should have been 15. A building with no depreciation claimed for two of the years in the file. A vehicle set up with a method that does not match its recovery period.

The instinct is to set it up correctly and move on — right method, right life, starting this year.

That is the one option not available, and the reason is worth understanding before Form 3115 enters the conversation at all.

Basis moves whether or not anyone claimed the deduction

Depreciation reduces basis by the amount allowed or allowable: the amount that could properly have been taken, not merely the amount someone took.

A client who claimed nothing on an asset for three years does not still hold the original basis. The allowable depreciation reduced it anyway, and the deduction for those years is simply gone unless it is recovered deliberately. Quietly starting to depreciate correctly this year leaves that gap permanently, and it surfaces on disposal as a larger gain than anyone expected.

So the choice is not between fixing it and leaving it. It is between two ways of fixing it, and which one applies is decided by how long the treatment has been in place.

Two consecutive years turns a mistake into a method

This is the distinction that sends a correction down one road or the other.

An impermissible treatment used on a single return is an error. The route is an amended return for that year.

An impermissible treatment used on two or more consecutively filed returns is generally treated as an adopted method of accounting. A method cannot be corrected by amending — changing it requires the consent of the Commissioner, which is what Form 3115 requests. Changing from an impermissible to a permissible method of accounting for depreciation is a standard automatic change, carried on the automatic-change list as designated change number 7.

Whether a particular history amounts to an adopted method or a one-year error is a determination about that client's facts, and it belongs to the preparer holding the file. What is not in doubt is that the answer depends on the years before you — which is to say, on records you did not create.

The §481(a) adjustment is the entire history compressed into one number

A method change does not start clean. §481(a) requires an adjustment that prevents amounts from being duplicated or omitted across the change, and for depreciation that adjustment is the cumulative difference between the depreciation that was taken and the depreciation that should have been taken, from the asset's placed-in-service date to the beginning of the year of change.

The IRS instructions state the timing plainly:

The section 481(a) adjustment period is generally 1 tax year (year of change) for a negative section 481(a) adjustment and 4 tax years (year of change and next 3 tax years) for a positive section 481(a) adjustment.

A negative adjustment — the taxpayer had been under-depreciating — is deducted in full in the year of change. That is why a 3115 is often worth doing rather than merely necessary: years of missed depreciation land in one return. A positive adjustment spreads over four years, with an election available to take it in one year where it is under 50,000, and a shorter period where the taxpayer is under examination.

The number is one line on a form. Producing it means recomputing every year of the asset's life twice, once as it was and once as it should have been.

What the computation needs from a document you did not produce

Both halves of that recomputation are historical, and if the client changed firms at any point, the history lives on a PDF from a previous preparer.

The should have been half needs the facts that determine correct depreciation: original cost, date placed in service, recovery period, method and convention. Every one of those is printed on a depreciation schedule, and every one of them is a fact the schedule asserts rather than something that can be derived from the current year.

The as it was half needs the depreciation actually claimed in each year — which a schedule carries as accumulated prior depreciation, not as a year-by-year series. Prior years' Forms 4562 carry the annual detail where the schedule does not.

Four ways that record disappoints, all of them ordinary.

A summary print. Some schedules report one combined prior depreciation figure without separating prior §179 and prior special depreciation allowance. The total is complete, so the adjustment's starting point is intact — but if the question is whether bonus was claimed on an asset, the page does not answer it. That is what a prior depreciation column carries, and what it does not.

The wrong variant transcribed. A client file prints federal, AMT, book, state and next-year copies of the same asset list. Each foots correctly against its own totals, so a schedule built from the AMT copy looks internally sound and describes a different history.

A figure lost in transit. Assets keyed by hand from a PDF drop rows and misread columns, and the resulting accumulated figure is wrong by an amount nobody can see.

Nothing at all. Some filings reference a depreciation schedule that was never attached. Then the history has to come from the prior firm or from prior returns, and there is no shortcut.

Checking the history before it becomes an adjustment

The arithmetic check is the same one that matters everywhere in this subject, and it takes minutes.

Sum the cost and the prior depreciation of the rows in each group and compare against the subtotals the schedule printed for those groups, at a dollar's tolerance for rounding. If they agree, the figures you are about to recompute from are the figures the prior firm reported. The tie-out does not tell you the prior treatment was correct — that is the question the 3115 exists to answer — but it does tell you that you are disagreeing with what the document actually said, rather than with a transcription error you introduced.

Then read the internal consistency: a life that does not match the method, an accumulated figure that does not correspond to the years elapsed, an asset showing depreciation after it was fully depreciated. Those are the signals that a method question exists at all.

What we do with it

The conversion transcribes a printed schedule into the import format your software accepts. It does not compute a §481(a) adjustment, does not determine whether a method was impermissible, and does not decide anything about a recovery period or a convention.

What it does is make the starting point trustworthy. The totals summed from the extracted rows must match the totals printed on the source, per activity and in grand total, before a file can be downloaded — so the history you recompute against is the history the document recorded. Where a print does not separate the prior components, they come back empty and flagged rather than zeroed, because a zero would answer a question the page did not.

The job of getting that history into your system is the prior year depreciation schedule for a new client, and what the same figures do at the other end of an asset's life is depreciation recapture.

FAQ

When does a depreciation correction need Form 3115 rather than an amended return?

An impermissible treatment used on a single return is an error, corrected by amending. Used on two or more consecutively filed returns it is generally an adopted method of accounting, and changing a method requires the Commissioner's consent, which Form 3115 requests.

What is the designated change number for a depreciation method change?

Changing from an impermissible to a permissible method of accounting for depreciation is carried on the automatic-change list as designated change number 7. The list itself is reissued periodically, so the current revenue procedure is worth confirming for the year of the filing.

How is the §481(a) adjustment for depreciation calculated?

It is the cumulative difference between the depreciation taken and the depreciation that should have been taken, from the placed-in-service date to the beginning of the year of change. Producing it means recomputing the asset's whole life on both bases.

How quickly is the adjustment taken into account?

A negative adjustment is taken in one tax year, the year of change. A positive adjustment is generally spread over four tax years, with an election available for a one-year period where the amount is under 50,000 and a shorter period where the taxpayer is under examination.

Does depreciation that was never claimed still reduce basis?

Yes. Basis is reduced by depreciation allowed or allowable, so an amount that could properly have been taken reduces basis whether or not it was claimed. That is why missed depreciation is recovered through a method change rather than ignored.

What if the prior preparer's schedule is the only record of the history?

Then it is the starting point, and its faithfulness matters more than usual. Tie the transcribed rows against the subtotals the schedule printed, confirm from the page heading which variant of the report it is, and treat anything the document did not print as unknown rather than zero.