Deductible expense

What it means

A deductible expense is a cost of operating a rental that you subtract from rental income in the year you pay it, lowering taxable profit dollar for dollar.

The statutory test is that the expense must be ordinary and necessary for the rental activity. Ordinary means common and accepted for a landlord; necessary means helpful and appropriate. Neither word means unavoidable — an expense can be optional and still deductible, provided it is genuinely for the rental rather than for you.

The everyday list is longer than most landlords claim:

• Mortgage interest (not principal)
• Property taxes and landlord insurance
• Repairs and maintenance
• Property management fees
• Advertising and tenant screening costs
• Legal and professional fees, including tax prep for the rental
• Utilities you pay
• Travel to and from the property, including mileage
• Supplies, bank fees on the rental account, software subscriptions
• HOA dues

Three costs commonly assumed deductible are not: the principal portion of your mortgage payment, capital improvements, and the value of your own labour. You cannot pay yourself for a weekend of work and deduct it.

Why it matters

This is the most straightforwardly valuable line of work in landlord bookkeeping, and the easiest to underclaim.

Every dollar of legitimate expense you fail to record is a dollar taxed as profit. At a 24% marginal rate, missing $3,000 across a year costs $720 — and $3,000 is an unremarkable amount to lose when the year's small expenses live across a personal card, a business card and cash.

The costs that go missing are almost never the big ones. Nobody forgets the insurance premium. What disappears is the accumulation of small items: four trips to the property at 62 cents a mile, the $180 screening fee, the $340 in bank charges, the software subscription, the $95 locksmith call. Individually trivial, collectively often four figures.

Deductions also work in the other direction if you overreach. Personal costs dressed as rental expenses are a reliable way to turn a routine question into a broader one. A trip that was mostly a holiday with an hour at the property is not a deductible travel expense, and claiming it puts every other number under more scrutiny than it deserved.

How it works in practice

For one property across one tax year:

	Amount
Rental income collected	28,800.00
Mortgage interest	(9,240.00)
Property tax + insurance	(4,180.00)
Repairs + maintenance	(1,850.00)
Management, legal, mileage, supplies	(2,240.00)
Taxable profit, before depreciation	11,290.00

That $11,290 then meets depreciation on line 18 of Schedule E, which is what drops the reported figure to roughly $1,959.

Two rules do most of the work in deciding what belongs on this list.

Timing. Most small landlords are cash-basis, meaning you deduct in the year you actually pay, not the year you are billed. A repair invoiced in December and paid in January is generally a January deduction.

Apportionment. Costs that serve both the rental and you personally are split. A phone line used partly for tenants is deductible in proportion to rental use, and that proportion needs a basis you could explain. The same applies to a home office, a vehicle, or a property you occupy part of the year.

The test that keeps you out of trouble is simple: would this cost exist if you did not own the rental? If it would exist anyway, it is probably not deductible in full.

Common mistakes

• Deducting mortgage principal. Only the interest. Your lender's year-end statement gives you the split — use it rather than totalling twelve payments.
• Expensing improvements. A capital improvement is capitalized and depreciated, not deducted in year one. This is the single most common adjustment in this area.
• Losing the small stuff. Mileage, bank fees, screening costs, subscriptions. The largest aggregate loss for most landlords, and entirely avoidable with a running ledger.
• Deducting your own labour. Your time is not a deductible expense, however much of it a turnover consumed.
• No receipt behind the number. A deduction you cannot substantiate is a deduction you may not keep. Bank statements show that money moved; they do not show what it bought.
• Running rental costs through a personal account. Not fatal, but it turns a five-minute year-end export into a forensic exercise and makes apportionment much harder to defend.
• Forgetting the vacancy period. Ordinary expenses on a property that is genuinely available to rent generally remain deductible while it sits empty.

How BareBones PM helps

Underclaiming is a record-keeping failure, not a knowledge failure. Most landlords know mileage is deductible; they just do not have a record of the trips.

BareBones PM gives every expense a home the moment it happens — tagged to a property, categorized to a Schedule E line, with the receipt attached to the transaction. The small items that normally evaporate get captured because recording them takes seconds, not because you remembered them in April.

Because entries are categorized as they are made, the year-end tax export totals each Schedule E line per property without any re-derivation. The number you file is the sum of entries you can point at individually, and each one has its documentation attached.

And when you would rather not type anything at all, the API and the automation integrations let recurring costs post themselves — so the insurance premium, the management fee and the monthly software charge land in the ledger without a human touching them.

For the full practical list and the grey areas, see What landlords can actually deduct.