Business Equipment: Can You Deduct the Full Cost?
A laptop can be a legitimate business asset without being 100% deductible. Learn how business-use percentage, the de minimis safe harbor, §179, bonus depreciation, regular depreciation, and California differences affect the write-off.
The Short Answer
Yes. A laptop Evan buys for his consulting business can be a legitimate business asset.
But that does not make the entire purchase price deductible.
If his $1,899 laptop is reasonably 80% business use, the business portion begins at:
$1,899 × 80% = $1,519.20
The personal portion remains personal.
From there, a second question begins:
When can Evan deduct the business portion?
Depending on the facts, it may qualify for the de minimis safe harbor, §179, bonus depreciation, or regular depreciation.
Those rules affect when the business cost is recovered.
They do not change how much of the laptop actually belongs to the business.
1. Business use comes first
When Evan asks whether he can deduct the laptop, Arthur does not start with depreciation.
He asks:
“How mainly?”
That is the right place to start.
A computer used for client models, presentations, accounting software, email, cloud storage, and video calls can have a clear business purpose.
But if Evan also uses it for banking, travel, personal email, or other nonbusiness activity, that personal use does not become deductible simply because he bought the computer for consulting.
Suppose Evan can reasonably support:
Purchase price
→ $1,899
Business use
→ 80%
Business portion
→ $1,519.20
Personal portion
→ $379.80
The tax rules generally begin with the business portion.
IRS — Publication 946, Partial Business Use
The receipt tells Evan what he paid.
It does not tell him how much belongs to the business.
2. Mixed use means the personal part stays personal
Evan bought the laptop because his consulting work needed a better computer.
That matters.
But why he bought it and how he actually uses it are not exactly the same question.
His new laptop eventually becomes mostly a work computer.
Mostly.
He still checks personal email on it.
He books a flight once.
That is why keeping the old laptop for personal use helps Evan’s facts without automatically proving an 80% business-use percentage.
The more clearly the computers develop separate roles, the easier it becomes to support a reasonable allocation.
But the allocation still needs to reflect actual use.
IRS — Publication 334, Business and Personal Expenses
The tax result follows the use.
Not the label Evan puts on the receipt.
3. Can Evan deduct the business portion right away?
Possibly.
For Evan’s $1,899 laptop, one of the first federal rules worth considering is the de minimis safe harbor for tangible property.
A taxpayer without an applicable financial statement may generally use the safe harbor for qualifying tangible-property costs of no more than:
$2,500 per invoice or item.
For a taxpayer with an applicable financial statement, the threshold is generally:
$5,000 per invoice or item.
IRS — Tangible Property Final Regulations
For Evan, the relevant invoice/item cost is the laptop’s:
$1,899
purchase price.
The $2,500 test is not reached by first multiplying the laptop by his 80% business-use estimate.
The item itself is already below the threshold.
But being under $2,500 does not make the deduction automatic.
For a taxpayer without an applicable financial statement, a written accounting policy is not required, but the taxpayer generally needs a consistent accounting procedure or policy in place at the beginning of the year, must expense qualifying amounts in the books and records, and must make the annual election with a timely filed return.
So:
“Under $2,500”
does not mean:
“Automatically deductible.”
And even if the de minimis safe harbor applies, only the qualifying business-use portion is potentially deductible.
The personal-use portion remains nondeductible.
If the requirements are met, however, the de minimis safe harbor can be a relatively simple way to recover the qualifying business cost of a small equipment purchase.
4. If not, §179, bonus depreciation, or regular depreciation may apply
If the de minimis safe harbor does not apply, the business portion of the laptop may still be recovered through other rules.
One possibility is §179.
For mixed-use property, the federal §179 election generally requires business use of more than:
50%.
If that requirement is met, the business-use percentage is applied to the property’s cost in determining the amount potentially eligible for §179.
IRS — Publication 946, Section 179 and Partial Business Use
At Evan’s estimated 80% business use, the starting business cost would again be:
$1,519.20
subject to the other §179 requirements and limitations.
Another possibility in Evan’s 2024 story year was bonus depreciation.
Qualifying property placed in service in 2024 generally had a:
60%
federal bonus-depreciation percentage.
Any remaining depreciable basis could generally be recovered under the regular depreciation rules.
Computers are generally five-year property for federal MACRS purposes.
The important point for Evan is not to memorize four different deduction methods.
It is to keep their roles separate.
Business use tells him how much cost belongs to the business.
The cost-recovery rule tells him when that business cost can be deducted.
5. Buying it is not the same as placing it in service
Evan does not receive a depreciation deduction simply because he clicks “Buy.”
For depreciation purposes, business property is generally placed in service when it is ready and available for its intended business use.
IRS — Publication 946, Placed in Service
In the Episode, Evan receives the laptop and begins setting it up.
Email.
Cloud storage.
Client folders.
Accounting software.
Video calls.
That sequence matters more for the tax timing than the day the computer sat in his online shopping cart.
Once the laptop is ready and available to perform the business function for which Evan bought it, the placed-in-service question becomes relevant.
6. A deduction does not make the laptop cheap
This is the financial question behind the tax rule.
Evan first looks at a:
$2,399
configuration.
Then he tells Daisy:
“If I can deduct it, the real cost is lower.”
He is not wrong.
But the sentence can become dangerous if it changes what he thinks the business needs.
A deduction does not reimburse the purchase price.
It reduces taxable income.
Suppose, only as an illustration, Evan eventually has about:
$1,519
of deductible business cost.
If every deductible dollar happened to reduce his combined taxes by 30 cents, the tax savings would be roughly:
$456
Not $1,519.
And certainly not the full $1,899 purchase price.
The actual result could be different depending on Evan’s federal income tax, self-employment tax, California tax, other items on the return, and the particular deduction method used.
That is why Arthur tells him:
“Don’t spend an extra dollar because you think the tax return is giving it back to you.”
The deduction can change the after-tax cost.
It should not decide what Evan buys.
7. Records matter — and California was different in 2024
Arthur asks Evan whether his 80% estimate is:
“Based on records or based on wanting the deduction?”
That distinction matters.
For federal purposes, computers and related peripheral equipment placed in service after 2017 are no longer treated as listed property.
IRS — Topic No. 704, Depreciation
That does not eliminate the need to support the business deduction.
Useful records may include the purchase receipt, placed-in-service date, client files and business applications, calendar or work records, and a reasonable method of supporting mixed business and personal use.
Evan does not necessarily need to record every minute the laptop is open.
But “probably 80%” is stronger when there is a factual basis behind it.
California in Evan’s 2024 story
California adds an important story-year difference.
For tax years beginning before January 1, 2025, California generally conformed to the Internal Revenue Code as of:
January 1, 2015.
That meant California had not yet incorporated the later federal change that removed computers from listed-property treatment.
California’s 2024 guidance continued to treat computers and peripheral equipment as listed property, subject to applicable exceptions.
California FTB — 2024 Form 3885A Instructions
For California §179 purposes, listed property used:
50% or less
in business generally did not qualify for the election.
At Evan’s estimated 80% business use, that threshold itself would not be the issue.
Supporting the 80% would be.
California also had a much lower §179 ceiling than federal law:
Maximum California §179 deduction
→ $25,000
Phaseout threshold
→ $200,000
Those limits are far above the cost of Evan’s one laptop, so they do not drive his particular decision.
But they show why federal and California depreciation should not automatically be assumed to match.
California’s 2024 Form 3885 guidance also provides additional support for the state’s listed-property treatment of computers and peripheral equipment.
California FTB — 2024 Form 3885 Instructions
8. What changed by 2026?
The first question has not changed.
How much of the equipment is actually being used for the business?
But some of the cost-recovery rules have.
In Evan’s 2024 story:
Federal bonus depreciation
→ generally 60% for qualifying property
For qualifying property acquired and placed in service after January 19, 2025:
Federal bonus depreciation
→ generally 100%
Federal §179 limits also increased substantially.
For tax years beginning in 2026:
Maximum federal §179 deduction
→ $2,560,000
Phaseout begins at
→ $4,090,000
Those numbers are not remotely the limiting issue for Evan’s $1,899 laptop.
They matter because the federal rules for larger equipment purchases have changed.
California changed too, but not in exactly the same way.
For tax years beginning on or after January 1, 2025, California moved its general IRC conformity date from January 1, 2015 to January 1, 2025.
So the specific 2024 listed-property issue should not simply be carried forward into later years without checking the current California rules.
But California still needs to be analyzed separately.
The state continues to differ from federal law in important depreciation areas, including federal bonus depreciation and the increased federal §179 limits enacted after California’s January 1, 2025 conformity date.
California FTB — 2025 Form 3885A Instructions
California FTB — Summary of Federal Income Tax Changes
The available deduction may therefore change from year to year.
The order of the questions should not.
First determine how much belongs to the business.
Then determine how the tax law allows that cost to be recovered.
Common Mistakes
“I bought it for the business, so the entire price is deductible.”
Not necessarily. If the equipment is also used personally, the personal portion generally remains personal.
“If the laptop costs less than $2,500, I automatically deduct it.”
No. The de minimis safe harbor has accounting-procedure and election requirements, and it does not make the personal-use portion deductible.
“If I use the laptop more than 50% for business, the whole laptop becomes deductible.”
No. The more-than-50% threshold can matter for §179, but it does not turn personal use into business use.
“§179, bonus depreciation, and regular depreciation are the same thing.”
No. They are different cost-recovery rules that can affect when the qualifying business cost is deducted.
“A $1,899 deduction means the laptop effectively costs me almost nothing.”
No. A deduction reduces taxable income. It does not reimburse the purchase price.
“Federal and California treatment will always be the same.”
No. Evan’s 2024 laptop is a good example of why the applicable California rules need to be checked separately.
The Key Distinction
Evan needs to separate three questions.
- Business use determines how much of the laptop belongs in the business tax calculation.
- The cost-recovery method determines when that business portion may be deducted.
- The deduction changes only part of the laptop’s after-tax cost.
The receipt tells Evan what the computer cost.
The business-use percentage tells him how much belongs to the business.
The tax rules tell him when that business cost can be recovered.
None of them tell him which laptop he needs.
Reference
Business and Personal Use
IRS — Publication 334, Tax Guide for Small Business
Current IRS guidance on ordinary and necessary business expenses, business equipment, and separating business and personal expenses.
IRS — Publication 334
IRS — Publication 946, How to Depreciate Property
Current federal guidance on partial business use, §179, bonus depreciation, MACRS, and placed-in-service rules.
IRS — Publication 946
De Minimis Safe Harbor
IRS — Tangible Property Final Regulations
IRS guidance on the $2,500/$5,000 de minimis safe-harbor thresholds, accounting-procedure requirements, and annual election.
IRS — Tangible Property Final Regulations
Evan’s 2024 Federal Rules
IRS — 2024 Publication 946
Historical IRS guidance supporting the 60% federal bonus-depreciation rule and other depreciation rules applicable to Evan’s 2024 story year.
IRS — 2024 Publication 946
IRS — Form 4562, Depreciation and Amortization
Federal form used for depreciation, §179, and related cost-recovery reporting when applicable.
IRS — Form 4562
California
California FTB — 2024 Form 3885A Instructions
California depreciation-adjustment and §179 guidance applicable to an individual taxpayer in Evan’s 2024 story year.
California FTB — 2024 Form 3885A Instructions
California FTB — 2024 Form 3885 Instructions
Additional 2024 FTB guidance supporting California’s listed-property treatment of computers and peripheral equipment.
California FTB — 2024 Form 3885 Instructions
California FTB — 2025 Form 3885A Instructions
California guidance reflecting the January 1, 2025 IRC conformity-date update and continuing federal/California depreciation differences.
California FTB — 2025 Form 3885A Instructions
California FTB — Summary of Federal Income Tax Changes
FTB guidance identifying California nonconformity to post-January 1, 2025 federal changes, including increased federal §179 limits and bonus-depreciation provisions.
California FTB — Summary of Federal Income Tax Changes
See This Rule in the Story
Episode 07 — The New Laptop
Evan needs a faster computer for client work.
The first one in his cart costs $2,399.
Then the phrase “business expense” starts making the upgrade feel cheaper than it really is.
Arthur brings him back to the question that comes before depreciation, §179, or bonus depreciation:
How much of the computer will actually be used for the business?
Evan eventually buys the computer that makes sense—not the one the deduction seemed to justify.
Related Tax Guide
Side Hustle Income: When Does It Become a Business?
Before Evan can deduct the cost of running a business, there first has to be a business to which the expense belongs.
This Guide explains when side income can become a Schedule C trade or business and why that distinction matters before Evan starts deducting the costs of operating it.
Money Meets Tax provides general educational information and is not individualized tax, legal, accounting, investment, or financial advice. Tax laws and guidance change, and the treatment of any transaction depends on the applicable law and specific facts. See the full Disclaimer.