Tracking expenses is a routine, not a project, and the businesses that do it well spend twenty minutes a week rather than a weekend a quarter. The routine has four parts: a category list everyone uses, a weekly entry of what was spent and by whom, receipts kept as they happen, and a fixed cycle for paying the team back. This page is for the small business owner who tracks expenses themselves or with one person's help: how to set the list, what the weekly routine is, how receipts and reimbursements fit, and what to read at month end. The business expense spreadsheet and the expense report template on this site are the two documents the routine runs on.
Set the category list once
Fewer than twenty categories with a one-line rule each, written where the team can see it: what goes in supplies, what goes in software, what goes in travel, what never goes in miscellaneous. Meals and entertainment in their own line. Equipment and capital purchases in their own line. The list is the structure everything else hangs on, and it should match the accountant's chart one to many. The spreadsheet on this site ships with a list in this shape.
The weekly routine
Once a week, enter every expense paid directly by the business from the bank and card statements: date, category, amount, payee, purpose. Enter every approved claim from the team under who paid. Flag any line at or above the receipt threshold without a receipt and chase it. Twenty minutes, every week, and the month is never a reconstruction.
Receipts as they happen
Photograph receipts the day they arise and file them by month. The regulatory floor is documentary evidence for any expenditure of $75 or more and for lodging at any amount under 26 CFR 1.274-5, and the policy can require less. A receipt found in a coat pocket in March for a January lunch is the failure mode; the weekly flag on the spreadsheet is the fix.
Reimbursements on a cycle
Team members submit expense reports on the template with the same categories, by a deadline inside the accountable plan's 60-day timing under 26 CFR 1.62-2; the owner approves within days; the business pays on a fixed day each month. Approved claims go into the tracker line by line. A cycle everyone knows produces small, complete claims; an open-ended arrangement produces a shoebox in December.
The month-end read
Total per category against last month and the plan. Fixed against variable. Discretionary lines. Meals. Reimbursements outstanding. Miscellaneous share. Ten minutes with the totals the spreadsheet computes, and the owner knows what the month cost and why. PerDiemDesk Pro, at $4 per month for the whole team, keeps the claims side of this against the people who spent; the free tools do the rest.
Questions people ask about how to track expenses for small business
How often should a small business track expenses?
Weekly for entry, monthly for the read. Quarterly tracking is reconstruction.
Do I need software to track expenses for small business?
Not at first. A spreadsheet with the right columns and a claim template with the same categories do the job; software earns its place when several people claim every month.
What is the most common mistake in tracking expenses for small business owners?
Letting miscellaneous grow and mixing meals into other categories. Both make the month unreadable and the year-end a sort.