---
title: A Depreciation Study Is Only as Good as the Record Under It
description: A depreciation study is only as good as the record under it. Asset category, condition and in-service status drift on the floor, and the study inherits it.
---

[ERP Tracks What You Think Exists. SoloTruth Proves What Does](https://www.solotruth.com/blog)

# [A Depreciation Study Is Only as Good as the Record Under It](https://www.solotruth.com/blog/depreciation-study-asset-record)

 Written by [Tim Harris](https://www.solotruth.com/blog/author/tim-harros) | Oct 14, 2026, 8:40:41 PM

Depreciation spreads the cost of equipment over the years it's expected to work, on the books and on the tax return. Every depreciation number rests on facts in the fixed asset register: what each asset is, whether it's still in service, what condition it's in and how long it should last. When those facts drift, the depreciation drifts with them.

A plant buys a delivery van and someone in accounts payable keys the invoice under machinery because the vendor sells machinery too. A press gets a new motor and a rebuilt frame and looks nothing like the press on the books. A compressor that was expected to last ten years is still running hard in year fourteen. None of these is a mistake anyone on the floor would notice, and each one quietly changes what the depreciation numbers should be.

The register can drift a long way from the floor. Kroll's fixed asset register health check found that more than 15 percent of recorded assets at one manufacturing client were no longer in service. That's one client, not an industry rate, and it measures only one kind of drift. This piece is for COOs, CEOs and operations leaders whose equipment the numbers describe, and for the finance teams who build depreciation on top of the record.

## What Is the Record Behind Depreciation?

The record behind depreciation is the set of facts the fixed asset register holds about each asset: its category, whether it's in service, its condition, where it is and how long it's expected to last.

Depreciation looks like a finance calculation, and the math is. The inputs are operational facts that only the people near the equipment can see. Four terms carry the rest of this piece, so here they are in plain language.

- **Useful life:** the number of years a company expects an asset to keep doing its job. It sets how fast the asset is depreciated: the shorter the life, the bigger each year's charge.
- **Asset category:** the class an asset is filed under in the register, such as vehicles, machinery or computer equipment. Each category usually carries a standard useful life, so the category an asset lands in decides how it's depreciated.
- **Misclassification:** an asset filed under the wrong category, such as a vehicle recorded as machinery or furniture recorded as computer equipment. The asset inherits the wrong useful life, and every year of depreciation after that is off.
- **Depreciation study:** a periodic review, often done by an outside specialist, that tests whether the useful lives in the register still match how long the equipment lasts. It reads the company's own history of what was bought and what was retired.

A depreciation study and a year-end useful-life review both work from the register. Neither one walks the floor asset by asset. It follows, as reasoning rather than a rule, that a review can only be as accurate as the record it reads. A retirement that was never booked reads as an asset that survived, and a vehicle filed as machinery is reviewed as machinery.

The drift is rarely dramatic. It's one keying decision at purchase, one rebuild nobody reported, one machine that outlasted its estimate. Each is reasonable on its own. Together they decide whether the depreciation line describes the equipment the company runs.

## Why the Asset Record Drifts From the Equipment

The record drifts because the facts behind depreciation change on the floor, while the register only changes when someone tells it. Five causes account for most of the gap:

1. **Category is decided by whoever keys the invoice:** the person entering the purchase picks a category from the invoice description, not from the equipment. A wrong pick at that moment sets the useful life for the asset's whole time on the books.
2. **Retirements don't travel to finance:** a scrapped or sold machine leaves with no invoice that routes to accounting, so the register keeps it until a count notices. A study reading that record sees an asset that never retired.
3. **Condition changes slowly and nobody records it:** wear, damage, rebuilds and heavy use all change how long a machine will last, and none of them creates a document finance receives.
4. **Equipment moves between sites and teams:** a machine transferred to another plant or crew often keeps its old location and owner in the register, which makes it hard to find when someone does check.
5. **Lives are set once and rarely revisited:** a standard life assigned at purchase tends to stay in place until something forces a change, even when the machine is plainly running longer or shorter than expected.

### Set Once and Left Alone vs. Kept Current From the Field

|  | **Set once and left alone** | **Kept current from the field** |
| --- | --- | --- |
| **Asset category** | Whatever was keyed from the invoice | Checked against verified photographic evidence of the asset itself |
| **In-service status** | Assumed in service until a count says otherwise | Updated when the crew pulls or retires the machine |
| **Condition** | Not recorded | Verified on inspection, with photographic evidence, location and a timestamp |
| **Location** | Where it was first installed | Where it was last seen, by whom and when |
| **Useful life** | The standard life for its category | Reviewed against condition and use, with evidence attached |

 

Nothing in the left column is anyone's fault. It's what a register looks like when the only time it's updated is at purchase and at the next count.

## What a Drifting Record Costs

A drifting record doesn't show up as one big error. It shows up as small misstatements in several places at once, none of them visible from the floor:

- **Depreciation that runs too fast or too slow:** a misclassified asset is depreciated on the wrong life every year it's on the books, and the error compounds quietly in the financial statements.
- **Useful-life reviews with nothing behind them:** international accounting rules (IAS 16) require useful lives and residual values to be reviewed at each financial year end and adjusted if the evidence has changed. A review is only as good as the condition evidence available to it.
- **A regulator's attention on useful lives:** Deloitte's summary of the 2025 AICPA and CIMA conference records Ella Karafiat of the SEC's Office of the Chief Accountant reminding preparers that ASC 360, the US accounting standard for long-lived assets, requires entities to continually evaluate the useful lives assigned to them.
- **A study that inherits the record's errors:** every retirement left on the books and every misfiled asset becomes part of the history the next depreciation study reads.

The same drift reaches the tax return and the insurance schedule. An unrecorded retirement has tax consequences of its own, covered in last week's post on [why retired on the floor isn't retired for tax](https://www.solotruth.com/blog/retired-equipment-tax-return).

None of this comes with a dollar figure, because the size depends entirely on each company's equipment and records. What it shares is a cause: facts that change on the floor and never reach the register.

*"You can't run reliability on untrusted asset data."*

Tim Harris, CEO, SoloTruth

## Who Is Most Affected?

The exposure is highest where equipment changes often and the people who see it change are far from the people who record it:

- **COOs and operations leaders:** their maintenance and replacement plans lean on the same useful lives finance uses, so a stale life misleads both.
- **CEOs and CFOs:** they sign off on financial statements whose depreciation line rests on facts nobody on the floor was asked to confirm.
- **Finance teams preparing year-end reviews:** they're asked to confirm useful lives every year and rarely have condition evidence to do it with.
- **Equipment-heavy businesses:** manufacturing, logistics, warehousing, construction and utilities all buy, rebuild, move and retire equipment constantly, often across many sites.
- **Companies heading into a sale, a financing or a new depreciation study:** a buyer, a lender or a specialist reads the register as it stands, and every stale fact in it becomes their starting point.

## What to Look For in a Process That Keeps the Record Current

A process that keeps the record behind depreciation current captures facts where they change, one asset at a time. When evaluating approaches, look for six capabilities:

1. **Capture from the people closest to the equipment:** crews record what they see during work they already do, rather than waiting for an annual count.
2. **Evidence of what the asset is:** verified photographic and asset evidence stored with the record, so the category can be checked against the equipment rather than the invoice.
3. **Condition as structured evidence:** condition captured the same way each time and verified, with photographic evidence, location and a timestamp, so a useful-life review has something to read.
4. **Status changes captured when they happen:** out of service, retired, sold, scrapped or moved, recorded at the moment the crew acts.
5. **Human approval before the record changes:** accounting reviews the evidence and approves each change before it reaches the system of record.
6. **An audit-ready trail for whoever reviews lives:** finance, auditors and depreciation specialists can trace each fact back to the evidence behind it.

## What Good Looks Like

A record that supports honest depreciation is simple to describe, and it depends on routine more than on any one system:

1. **Check the category at purchase:** compare what was keyed from the invoice with what the equipment is, and fix it before the first year of depreciation runs.
2. **Record condition during normal work:** inspections, maintenance visits and walk-throughs already happen. Capture condition as they do, instead of in a separate project.
3. **Treat status changes as events:** a retirement, a sale or a transfer updates the record when it happens, not when a count discovers it.
4. **Review useful lives with evidence in hand:** when finance confirms lives at year end, condition and use records sit next to the number being confirmed.
5. **Give the next study a clean history:** a depreciation study reads what was bought and retired, so a current record gives it real history instead of leftovers.

None of this requires replacing the ERP. It's the same floor-to-finance handoff covered in our post on [why out of service is not retired](https://www.solotruth.com/blog/out-of-service-not-retired-fixed-asset-record), applied to every fact depreciation depends on.

## Common Misconceptions About Depreciation and the Asset Record

Three assumptions keep the record behind depreciation from being questioned, and each one sounds reasonable until someone looks at the equipment:

### Misconception: A depreciation study fixes the record.

**Reality:** a study reads the record. It estimates lives from what was booked as bought and retired, so it inherits whatever the register got wrong.

### Misconception: An asset's age tells you its useful life.

**Reality:** age tells you how long an asset has been in service. How long it will keep working depends on condition, use and maintenance, which is evidence the register rarely holds.

### Misconception: Misclassification is a harmless filing error.

**Reality:** the category sets the useful life, so a misfiled asset is depreciated on the wrong schedule every year it stays on the books.

## Frequently Asked Questions

### What is a useful life?

It's the number of years a company expects an asset to keep doing its job. The useful life sets how fast the asset is depreciated, so a wrong life misstates depreciation every year.

### What is a depreciation study?

It's a periodic review, often done by an outside specialist, that tests whether the useful lives in the register still match how long equipment lasts, mainly by reading the company's own purchase and retirement history.

### How often should useful lives be reviewed?

International accounting rules (IAS 16) require a review at each financial year end. In the US, SEC staff have reminded preparers that useful lives must be evaluated continually under ASC 360.

### What is asset misclassification?

It's an asset filed under the wrong category in the fixed asset register, such as a vehicle recorded as machinery. Because each category carries a standard life, the asset is depreciated on the wrong schedule.

### Does an asset's age determine its useful life?

No. Age shows how long an asset has been in service. How long it will keep working depends on its condition, use and maintenance, so a useful-life review needs that evidence.

### What evidence supports changing a useful life?

Condition recorded on inspection, maintenance history and how hard the asset is used, each dated and traceable. A standard life for the category is a starting assumption, not evidence.

### What is asset relationship management (ARM)?

Asset relationship management is a control layer above the ERP that captures physical evidence about assets and routes it through approval before the financial record changes.

## Depreciation Starts on the Floor

Depreciation is calculated in finance, but every input to it is a fact about equipment: what it is, whether it's still running, what shape it's in and how long it should last. When those facts are captured where they change and reviewed before the register moves, the depreciation line describes the equipment the company runs. When they aren't, every review and every study works from leftovers.

This is the gap SoloTruth's Asset Relationship Management platform (ARM) was built to close. Your own crews capture status changes in SoloTruth's mobile inspection app during work they already do, scanning the asset's QR code or barcode on the phones they already carry, with no extra hardware, and ARM gathers and verifies photographic, condition and other asset evidence, with location and a timestamp. ARM routes every finding to your accounting team for approval before the ERP is updated. SoloTruth has used the SoloTruth/VirtuSpect platform to manage and complete inspections, verifying condition and location, at over 1,000 businesses across the US.

Book a 30-minute strategy call at calendly.com/tim-harris-solotruth/30min to see how continuous verification changes what your fixed asset register is capable of.

*Last Updated: October 2026*

[View full post](https://www.solotruth.com/blog/depreciation-study-asset-record)

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