No, revenue does not include expenses. Revenue is the total money your business takes in from sales before any costs are subtracted, which is why accountants call it the “top line” of an income statement. The number left after you subtract expenses is net income, and that is the figure your tax bill is built on.
What Revenue Actually Measures
Revenue is the total amount your business earns from selling products or providing services during a given period. A bakery that sells $80,000 worth of cakes and pastries in a year has $80,000 in revenue, regardless of what it spent on flour, rent, or wages. Nothing has been taken out yet.
One boundary worth flagging: revenue and gross income are not perfect synonyms on a federal tax return. Gross income can sweep in investment earnings, rental payments, and other sources beyond your core sales, while revenue refers specifically to what your business operations bring in. Each line on a tax form has a precise meaning, so keeping the two terms distinct matters when you fill out a return.
You may also see the term “net revenue.” That is still a top-line concept — total sales minus returns, allowances for damaged goods, and promotional discounts. Net revenue does not touch salaries, rent, or utilities. It is a cleaner version of what you sold, not a measure of profit.
Where Expenses Come In
Expenses are the costs you pay to run the business and generate those sales. On an income statement, they are subtracted from revenue in layers, and the order tells you something useful about where your money is going.
If you sell physical products, the first subtraction is cost of goods sold (COGS): the direct costs of producing what you sell, such as raw materials, manufacturing labor, and inbound shipping. Revenue minus COGS gives you gross profit. Next come operating expenses — rent, administrative salaries, marketing, software, insurance, and other overhead not tied to a specific unit of product. Subtract those and you have operating income. Take out interest and taxes, and you are left with net income.
The formula at the bottom is simple: total revenue minus total expenses equals net income. If your business brings in $100,000 in revenue and spends $70,000 across all categories, net income is $30,000. That $30,000 is the number the IRS taxes, not the $100,000.
Why the Difference Matters at Tax Time
Confusing revenue with net income is one of the fastest ways to misjudge how much cash your business actually has. Only net income is taxed. For individuals and sole proprietors, federal income tax rates for 2026 range from 10% to 37% depending on your bracket.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026 Corporations pay a flat 21%.2Office of the Law Revision Counsel. 26 US Code 11 – Tax Imposed
If you are a sole proprietor, independent contractor, or partner in a partnership, net income also carries self-employment tax on top of regular income tax. The rate is 15.3%, covering both halves of Social Security (12.4%) and Medicare (2.9%).3Internal Revenue Service. Self-Employment Tax (Social Security and Medicare Taxes) The Social Security portion stops applying to earnings above $184,500 for 2026; the Medicare portion has no cap.4Social Security Administration. Contribution and Benefit Base A self-employed person with $80,000 in net earnings owes roughly $12,240 in self-employment tax alone, before regular income tax enters the picture.
Because no employer is withholding along the way, business owners generally have to make quarterly estimated payments if they expect to owe at least $1,000 in federal tax for the year.5Internal Revenue Service. 2025 Form 1040-ES Setting money aside from each payment you receive, rather than waiting for a year-end reckoning, is the practical way to bridge the gap between what your revenue looks like and what you actually keep.
Which Expenses Reduce Your Revenue for Tax Purposes
Federal tax law lets you deduct expenses that are “ordinary and necessary” for your trade or business under 26 U.S.C. § 162. Ordinary means common and accepted in your industry; necessary means helpful and appropriate. The statute names reasonable salaries, business travel, and rent as examples.6Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses Most everyday costs qualify: utilities, insurance, supplies, marketing, raw materials, and interest on a business loan.
Several categories are specifically disallowed, and treating them as deductions can trigger accuracy-related penalties.
- Entertainment costs such as concert tickets, sporting events, or club memberships.7Office of the Law Revision Counsel. 26 US Code 274 – Disallowance of Certain Entertainment, Etc., Expenses
- Business meals, but only at 50% of the cost, not the full amount.7Office of the Law Revision Counsel. 26 US Code 274 – Disallowance of Certain Entertainment, Etc., Expenses
- Fines and penalties paid to a government entity for violating a law.
- Political contributions and expenses tied to campaign participation.
- Life insurance premiums on policies covering an officer, employee, or owner when the business is directly or indirectly the beneficiary.8eCFR. 26 CFR 1.264-1 – Premiums on Life Insurance Taken Out in a Trade or Business
Claiming a disallowed cost inflates your expenses on paper and understates net income, which is what the penalties are meant to catch.
When Revenue Gets Counted
Even after you agree that revenue and expenses are separate, timing determines which period each one lands in. Your accounting method controls that.
Under the cash method, you record revenue when payment actually arrives and deduct expenses when you pay them. A $5,000 invoice sent in December but paid in January is January income. There is one wrinkle: money you have immediate access to counts as received even if you delay handling it, under a rule called constructive receipt.9Legal Information Institute. Constructive Receipt of Income
Under the accrual method, you record revenue when you earn it, regardless of when cash arrives. The “all-events test” recognizes income once you have a fixed right to receive it and can determine the amount with reasonable accuracy.10Internal Revenue Service. General Rule for Taxable Year of Inclusion – Revenue Ruling 2003-10 Finishing a job in December triggers income for that year even if payment does not clear until February.
Most small businesses use the cash method because it lines up tax with actual cash flow. C corporations and partnerships that include a C corporation partner generally have to use accrual unless they pass a gross receipts test. The statute sets the base at $25 million in average annual gross receipts over the prior three years, adjusted for inflation each year.11Office of the Law Revision Counsel. 26 US Code 448 – Limitation on Use of Cash Method of Accounting For 2026, the inflation-adjusted threshold is $32 million. Below that, entity type generally does not force you off the cash method.
Records That Back Up Both Numbers
Tracking revenue and expenses separately is a legal requirement, not just an accounting preference. Anyone liable for federal tax has to keep records that support the income, deductions, and credits on a return. The standard retention period is three years for most business records, longer in specific situations: four years for employment tax records, six years if you leave off income exceeding 25% of what you reported, seven years if you claim a bad debt or worthless securities deduction, and indefinitely if you never filed or filed fraudulently.12Internal Revenue Service. How Long Should I Keep Records
If the IRS audits you and you cannot produce records for a deduction, the deduction can be disallowed. That effectively pushes your reported net income up and your tax with it, which brings the whole conversation back to the same point: revenue is what came in, expenses are what you can prove went out, and only the difference between the two is really yours to keep.