What Receipts Do You Need for the Home Office Deduction?
The receipts you need depend on the method. The simplified method ($5 per square foot, up to 300 sq ft) needs almost none — just proof of the space and its business use. The regular method deducts the business percentage of actual home costs, so it needs the underlying records: rent or mortgage interest, utilities, insurance, repairs, and depreciation support. Either way, eligibility comes first: the space must be used regularly and exclusively for business — a fact you document, not a receipt you keep.
This is general information, not tax advice.
Before receipts: documenting eligibility
The audit question that sinks home-office claims isn't math — it's exclusive use. Substantiate the space itself: measurements (office square footage and the home's total), a floor-plan sketch, and dated photos showing a dedicated workspace, not a guest room with a laptop. Self-employed filers claim this on Schedule C via Form 8829 (regular method) or the simplified safe harbor; W-2 employees generally cannot claim it federally under current law.
Simplified method: the near-zero-paper option
Multiply the office's square footage (capped at 300) by $5. Keep: the measurement record, evidence of regular business use, and — that's essentially it. No utility bills, no allocation math. The trade: often a smaller deduction, no depreciation, and home operating costs stay personal. For small offices and renters with low costs, the paperwork savings can be worth more than the difference.
Regular method: the full receipt list
The business percentage (office ÷ home square footage) applies to:
- Rent (renters) — the lease and payment records; rent receipts or bank statements.
- Mortgage interest and property taxes (owners) — Form 1098 and tax bills.
- Utilities — electric, gas, water, trash: twelve months of bills or the provider's annual statement.
- Internet and phone — bills plus a defensible business-use percentage (documented reasoning, not vibes).
- Homeowners/renters insurance — the policy declarations.
- Repairs and maintenance — receipts, split by scope: whole-home repairs (furnace) deduct at the business percentage; office-only repairs (repainting the office) deduct fully. Keep contractor receipts with the work described, per service receipt standards.
- Depreciation (owners) — purchase closing documents and improvement receipts; these carry the long retention clocks from how long to keep receipts, and depreciation recapture at sale makes them permanent records.
Utility bills arrive digitally — the capture-and-file habit from self-employed receipt tracking covers this list almost automatically. Providers' annual usage summaries compress twelve documents into one.
What doesn't belong in the claim
Landscaping, the first phone line, and anything for parts of the home not used for business. Office furniture and equipment are real deductions but not home-office ones — they're ordinary business purchases with their own receipts (the deduction map).
The bottom line
Measure and photograph the space either way. Simplified: stop there. Regular: keep the year's home bills and split repairs by scope — a folder named "Home office 2026" holding twelve utility PDFs, the insurance dec page and the repair receipts is the entire audit defense, assembled in real time.
Frequently asked questions
- Do I need receipts for the simplified home office method?
- Almost none — the $5/sq ft safe harbor needs the office measurement, proof the space is used regularly and exclusively for business, and your income records. Home operating bills aren't part of the calculation.
- What records prove exclusive use of a home office?
- Measurements, a floor plan, and dated photos of a dedicated workspace. Exclusive use is the eligibility test auditors probe first — a space that doubles as a guest room fails it regardless of receipts.
- Can W-2 employees deduct a home office?
- Generally not on federal returns under current law — the unreimbursed employee expense deduction is suspended. Some states differ, and self-employed side income can still support a claim for that business's workspace.
- Are internet and phone bills part of the home office deduction?
- They're deductible at a documented business-use percentage — kept with the home-office file in practice, though technically ordinary business expenses. Keep the bills and note the basis for your percentage.