Why This Tool Exists
A home office reimbursement done the right way is not about squeezing every dollar. It is about building a repeatable process your CPA can defend.
This calculator estimates a conservative reimbursement amount using a square-foot allocation, then gives you a documentation checklist so the math actually survives real-world execution.
Home Office Reimbursement Calculator
Square-foot allocation, reimbursement cadence, and a documentation checklist.
| Expense category | Annual expense | Allocated reimbursement |
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What This Calculator Is Actually Doing
You enter your home's total square footage and your dedicated office square footage to compute a business-use percentage.
Then you add the home expenses you want to reimburse (utilities, internet, rent, insurance, repairs, HOA, and similar).
The calculator allocates each expense by the business-use percentage, then suggests a monthly reimbursement cadence so you can stop doing year-end reconstructions.
Execution Notes (Where People Get Burned)
If the space is not exclusive and regular, the math does not matter. The qualification gate matters first.
If you cannot show a simple policy, a reimbursement request, and contemporaneous receipts, your accountant ends up cleaning up a mess at tax time.
Keep it boring: monthly reimbursement, one folder per year, and the same worksheet every month.
What To Hand Your CPA
A one-page accountable plan policy (effective date, what is reimbursable, and how reimbursements are requested).
Your square-foot calculation (floor plan or measurement notes, plus photos).
Expense proof (bills, receipts, statements) and a monthly reimbursement log.
Documentation Checklist (Keep It Defensible)
- Create a one-page objective memo before you execute (what outcome you are trying to buy).
- Store your assumptions and calculations in a dated PDF (no year-end reconstructions).
- Keep evidence in the same folder structure every month (receipts, logs, approvals).
- Ask your CPA what would make this easy to sign off on, then build that packet.