4100incomeNormal balance: Creditbusiness4100 — Service Revenue
Where Sales tracks revenue from goods, Service Revenue tracks revenue from doing something — consulting, labor, a project delivered, an hour billed. If the business is built around expertise or time rather than inventory, this is usually the primary revenue account, sometimes the only one used at all.
As an income account, Service Revenue carries a normal credit balance: completing and billing for work is a credit that grows revenue, and it happens whether payment is collected immediately or invoiced for later collection, depending on the business's accounting method.
One judgment call worth naming honestly: reimbursed expenses billed to a client at cost — mileage, materials passed through at no markup — are sometimes recorded here as revenue and sometimes as a direct offset to the related expense instead. Both approaches are used in practice; what matters is picking one and staying consistent, since it changes how gross revenue looks without changing actual profit either way.
What belongs here
- revenue from consulting, labor, or professional services rendered
- hourly billing and time-based fees
- project or contract fees for work completed
- retainer fees earned for ongoing service commitments
What does not belong here
- product or inventory sales, if the business tracks those separately — Sales (4000)
- a customer deposit collected before any work has actually been performed — not yet earned revenue; flag it until the work is done
- tips collected on behalf of staff — those belong to the employees, not the business's own revenue, and typically flow through a payroll liability rather than this account
- interest or incidental income — Other Income (4900)
Where it shows up
Shows at the top of the income statement as core revenue, often the only revenue account a labor-based business uses. Many businesses leave Sales unused entirely if they sell no product at all.
Common questions
- Should reimbursed client expenses count as Service Revenue?
- It depends on your preference — some businesses record the reimbursement as revenue here, others offset it directly against the related expense. Either works as long as you are consistent.
- When is service revenue actually recognized?
- Typically when the work is completed and billed, on an accrual basis, rather than only once payment is collected — confirm which accounting method your books follow if the distinction matters to you.