The governing standard for a business deduction is short: the expense must be ordinary and necessary for your trade or business. Ordinary means common and accepted in your field. Necessary means helpful and appropriate. Neither means extravagant, and neither means personal.

Costs that are usually straightforward

  • Rent for business premises, and utilities for that space
  • Employee wages, contractor payments and payroll taxes
  • Supplies, inventory and materials
  • Business insurance premiums
  • Professional fees — legal, accounting, bookkeeping
  • Software subscriptions and business-line phone or internet service
  • Advertising, marketing and website costs
  • Bank fees, merchant processing fees and business loan interest
  • Licences, permits and professional dues
  • Continuing education that maintains or improves skills for your current business

The areas that need care

Vehicle use

You may use the standard mileage rate or actual expenses, but the choice has consequences for future years, so it is worth deciding deliberately. Either way, commuting from home to your regular workplace is not deductible. A mileage log — date, destination, purpose, miles — is what makes this claim stand up. An app that captures it automatically is a sound investment.

Home office

The space must be used regularly and exclusively for business. Exclusively is the word that disqualifies most claims: a desk in the corner of a guest room that doubles as a study does not qualify. A dedicated room, or a clearly delineated area used for nothing else, does. There is a simplified per-square-foot method and an actual-expense method; we can compare them for you.

Meals

Business meals are generally deductible at 50% when there is a clear business purpose and a business contact present. Note on the receipt who you met and why — a note written that day is worth far more than a reconstruction eighteen months on. Entertainment, as distinct from meals, is generally not deductible.

Travel

Travel away from your tax home overnight for business is deductible — airfare, lodging, ground transport, and meals subject to the 50% limit. When a trip mixes business and personal time, only the business portion counts, and the allocation needs to be defensible.

Equipment and assets

Larger purchases are generally capitalised and depreciated over time, though provisions such as Section 179 and bonus depreciation may allow a much faster write-off. Faster is not automatically better: if you expect higher income in later years, spreading the deduction can be worth more overall. This is a planning conversation, not a filing-season one.

Personal expenses do not become deductible by being paid from a business account

Where the money came from does not determine deductibility — the purpose of the spending does. Running personal costs through the business creates bookkeeping problems, complicates the return, and can undermine the liability protection of an LLC or corporation if it becomes a pattern.

Three habits that make all of this easier

  1. Separate accounts. A dedicated business bank account and card removes most of the guesswork before it starts.
  2. Capture receipts as they happen. Photograph them, and note the business purpose in the same moment.
  3. Reconcile monthly. Twelve short sessions are easier than one long February, and problems surface while you can still remember what they were.

Costs before you opened

Money spent getting a business off the ground — market research, initial advertising, professional fees — is treated as start-up expenditure rather than ordinary operating cost. A portion may be deductible in the first year with the balance amortised. Keep those early receipts; people frequently discard them assuming they do not count.