Expenses
Total operating, cost-of-goods-sold, and overhead costs a company incurs in a period to run the business and generate revenue.
◆ Currency
Formula
Built from
What it measures
A single line-item aggregate of every cost the company records in the period: direct delivery costs (COGS), sales and marketing spend, R&D salaries, and general overhead like rent, insurance, and tools. It is the company's total burn — the full cost base that sits beneath revenue on the income statement.
Why it matters
Expenses is the denominator of profitability: Profit = Revenue − Expenses. When you report to a board you show all three — the top line (revenue), the cost base (expenses), and the gap (net income or loss). Early-stage companies deliberately run Expenses above revenue to fund growth, so your job is to show a credible path to profitability. As you scale, your expense-to-revenue ratio should shrink: each new dollar of revenue costs fewer expense-dollars to produce.
How to read it
Never read Expenses as a single number — it is meaningless without revenue beside it. The real metric is the ratio, Expenses ÷ Revenue, and its trend. A Series-A company spending $5M/quarter to reach $2M ARR is at ~120% of run-rate revenue (expected); a $100M-ARR business spending $5M/quarter is at 20% (sustainable). Same dollar figure, opposite verdicts. Then decompose by category — COGS, S&M, R&D, G&A — to see where the money actually goes. Most expense surprises hide inside one drifting bucket, like CAC creeping from 20% to 35% of revenue with no one deciding to scale.
What good looks like
Good
Expenses grow slower than revenue, so the expense-to-revenue ratio is falling and gross margin and unit economics are improving as you scale.
Watch
Expenses grow in line with revenue, or one cost category spikes without a planned-growth reason — tooling sprawl, contractor creep, or CAC drifting up.
Bad
Expenses grow faster than revenue, compressing margin and threatening profitability, made worse if churn or a revenue miss shrinks the top line beneath the cost base.
Watch-outs
- Reading Expenses without revenue. $8.5M in annual expenses is healthy at $100M revenue (8.5% ratio) and catastrophic at $10M revenue (85% ratio). Always compute expense-to-revenue or compare to your own trend before judging the number.
- Mixing cash and accrual accounting. If you book salaries when paid but revenue when earned, Expenses and Revenue fall in different periods and every margin you report is wrong. Pick one basis — almost always accrual for SaaS — and apply it consistently.
- Treating all Expenses as equally cuttable. COGS is variable (rises with customers), S&M is semi-fixed (pausable but with commitments), R&D and G&A are largely fixed. When revenue dips you can't cut 50% of cost in a month — segment by fixed/variable/semi-fixed before you plan a cut.
- Leaving one-time charges in the run-rate. A $500K severance or office move is real expense but not recurring. Flag it separately when forecasting or presenting, or you'll overstate your ongoing operating burn.
Worked example
Hypothetical
Your SaaS does $10M in revenue for the year. Costs break down as $3M COGS (cloud, APIs, support), $2M sales and marketing, $2M R&D (engineers not tied to delivery), and $1.5M G&A (legal, finance, facilities, insurance). Total Expenses are $8.5M, leaving $1.5M net income — a 15% net margin and an 85% expense-to-revenue ratio, reasonable for a scaling SaaS.