Business Expense Deductions
Learn what makes a business cost deductible, the main categories, and the records that make it stick.
TL;DR
- Deduct costs that are
ordinaryAndNecessaryfor your line of work. - Write off equipment in year one with
Section179expensing. - Back every deduction with records, or the IRS can
disallowit.
What Qualifies
OrdinaryA cost that is common and accepted in your field.
Normal for your tradeNecessaryHelpful and appropriate for the business.
Useful, not required to be vitalBusiness OnlyPersonal costs never qualify as deductions.
No personal expensesMixed UseSplit shared items by their business-use share.
Deduct the business percentageCommon Categories
Home OfficeA space used only for work, by simple or actual method.
$5/sq ft, up to $1,500VehicleBusiness miles by the standard rate or actual costs.
76 cents/mile (72.5 before July 2026)MealsHalf of a business meal, with the purpose noted.
50% of qualifying mealsGear and ServicesEquipment, software, ads, and professional fees.
Ordinary business costsWrite Off Equipment
Section 179Deduct qualifying equipment in full the first year.
Up to $2,560,000 in 2026Bonus DepreciationDeduct 100% of eligible assets, and it can make a loss.
100% in 2026, made permanentCapped by IncomeSection 179 cannot push your business into a loss.
Limited to business incomeOr DepreciateSpread the cost over the asset's life instead.
MACRS over 5, 7, or more yearsRecords That Stick
Separate AccountsA business account and card keep books clean.
No comminglingKeep the DetailsNote the amount, date, place, and purpose.
Amount, date, place, purposeLog the Tricky OnesMileage and meals need extra detail.
Miles logged, meal purpose notedHold ThemKeep records for at least three years.
3 years, 7 to be safeTips
- Keep business and personal money fully separate with a dedicated
businessAccountand card, so every deduction is clean and easy to prove. - Review your books each quarter, not just at filing, so you catch missed
deductionswhile you can still find the receipts.
Warnings
- For a mixed-use item like a phone or car, deduct only the
businessUseshare, never the whole cost. - Without records showing the amount, date, and business purpose, the IRS can
disallowa deduction you really earned.
In Practice
Compare deducting equipment all at once with depreciating it over years.
You buy $20,000 of equipment for your business and are in the 24% bracket.
- Depreciate it: about $4,000 deducted in year one under MACRS.
- Year-one savings that way: $4,000 x 24% = $960.
- Section 179 instead: deduct the full $20,000 now.
- Year-one savings: $20,000 x 24% = $4,800.
Section 179 delivers $4,800 of savings this year instead of $960.
Section 179 pulls the whole deduction into the year you buy the equipment.
FAQ
It must be both ordinary and necessary, meaning common in your trade and helpful to your business. It does not have to be indispensable. Purely personal costs are never deductible, and a mixed-use item is deductible only for the share you actually use for business. Keep a record of each expense.
It lets you deduct the full cost of qualifying equipment and software in the year you put it to use, instead of depreciating it over several years. The 2026 limit is $2,560,000, which covers essentially any small business purchase. The deduction cannot exceed your business's taxable income, and any excess carries forward.
For each expense: the amount, the date, the place, and the business purpose. Receipts, invoices, bank and card statements, and logs all help. For travel, meals, and vehicle use the rules are stricter, so keep a mileage log and note who and what a business meal was for. Good records turn a deduction into a defensible one.
Only if the space is used regularly and exclusively for business, so a corner of a room that doubles as a guest bed will not qualify. You can use the simplified method, $5 per square foot up to 300 square feet, for a $1,500 maximum, or track actual expenses for a potentially larger deduction.