⬤ Equity & Stock Compensation
Business Taxes Explained: The Main Types and How Each One Works
Every U.S. business pays tax in more than one way, and rarely on a single date. This guide maps the full landscape income, payroll, sales, property, and excise so you can see what applies, how each is calculated, and where the numbers come from.
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Most owners do not get tripped up by the rates. They get tripped up by the structure choosing the wrong entity, missing a filing they did not know applied to them, or treating a tax as annual when it is really quarterly. We have written this the way we would explain it across a desk: plainly first, then with the detail your controller or CPA will want.
What counts as a business tax
A business tax is any levy a company owes to a federal, state, or local government as a condition of operating. The label covers a wide range of obligations that have almost nothing in common except who collects them some are charged on profit, some on wages, some on sales, some on property, and some on the act of selling a specific product.
Three features separate business taxes from the personal taxes you already know:
- They attach to the entity, not the individual.Who pays and on which form depends on how the business is legally organized.
- They stack across jurisdictions. The same dollar of activity can trigger federal, state, and local tax at once, each with separate filings.
- They run on staggered calendars. Payroll tax is deposited through the year, sales tax is remitted monthly or quarterly, and income tax is reconciled annually. There is no single “tax day” for a business.form depends on how the business is legally organized.
Why your entity type decides almost everything
Before you look at any rate, look at your legal structure. It determines which return you file, whether profit is taxed once or twice, and how the owners are taxed on what they take out. The same $200,000 of profit can produce very different tax outcomes depending on this single choice.
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Structure
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How profit is taxed
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Primary federal return
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Passes through to the owner’s personal return; subject to self-employment tax
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Schedule C with Form 1040
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Partnership / LLC (multi-member)
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Passes through to partners by ownership share; entity files an information return
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Form 1065 (plus Schedule K-1 to each owner)
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Passes through to shareholders; can split salary vs. distribution
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Form 1120-S (plus Schedule K-1)
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Taxed at the corporate level, then again when profits are distributed as dividends (“double taxation”)
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Form 1120
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Pass-through entities (sole proprietorships, partnerships, most LLCs, and S corps) do not pay federal income tax at the entity level the profit lands on the owners’ returns. A C corporation pays its own tax, and shareholders pay again on dividends. Neither model is universally better; the right answer depends on how much profit you reinvest, how you pay yourself, and your state’s rules.
The five main types of business tax
Almost every obligation a U.S. business faces falls into one of five buckets. We will take them in the order most companies encounter them.
- Income tax.
Income tax is charged on profit revenue minus allowable expenses not on the money flowing through your accounts. Whether the business itself pays, or the tax passes through to the owners, is decided by the entity type above.
Two practical points catch people out. First, the federal corporate rate is a flat figure, but states layer their own income or franchise taxes on top, so your true rate is rarely the headline number. Second, income tax for a business is usually not a once-a-year event: if you expect to owe a meaningful amount, the IRS requires estimated quarterly payments throughout the year, with a true-up at filing.
- Payroll and employment taxes
The moment you have employees, you take on payroll tax and these are the obligations the IRS pursues most aggressively, because you are holding money withheld from someone else’s wages. They split into amounts you withhold from employees and amounts you owe as the employer.
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Tax
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Who funds it
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What it covers
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Split between employer and employee
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Retirement, disability, and hospital insurance benefits
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Employer only
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Federal share of unemployment benefits for laid-off workers
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Employer (rate varies by claims history)
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State unemployment insurance funds
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Income tax withholding
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Withheld from employees
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Prepayment of employees’ own federal/state income tax
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Withheld amounts are not your money. You are a custodian, and depositing them late or using them for cash flow is one of the fastest ways to attract penalties and personal liability for the people who run payroll.
- Sales and use tax
Sales tax is collected from your customer at the point of sale and remitted to the state — you are the conduit, not the taxpayer. Rates and rules vary not just by state but often by county and city, and what is taxable (services, digital goods, food) differs everywhere.
A 2018 Supreme Court decision changed the game for anyone selling across state lines: a state can now require you to collect its sales tax once you cross a sales or transaction threshold there, even with no physical presence. This is called economic nexus, and it is the single most common compliance gap for growing online sellers.
Two related concepts:
- Use tax applies when you buy something taxable from out of state and no sales tax was charged you owe the equivalent to your own state.
- Property tax
Property tax is a local levy on what the business owns. Most owners think only of real estate, but many jurisdictions also tax business personal property the movable assets you use to operate.
Commonly taxable business personal property includes:
- Furniture and fixtures desks, shelving, cabinetry
- Computers, servers, and electronic equipment
- Machinery, tools, and operating equipment
- Supplies and inventory, in some jurisdictions
There is also real estate transfer tax, charged when property changes hands. Because property tax is assessed locally and based on assessed value, two identical businesses in different counties can owe very different amounts and assessments can be appealed.
- Excise tax
Excise tax targets specific goods and activities rather than profit or sales generally — fuel, tobacco, alcohol, air travel, certain environmental products, and more. If your business touches one of these categories, the tax is often built into the price and remitted on its own federal or state schedule.
Excise taxes come in two forms:
- Ad valorem - a percentage of value. A 10% excise on a $10 item adds $1.
- Specific (per-unit) - a fixed amount per quantity, regardless of price. A 25-cent-per-gallon fuel tax adds 25 cents to every gallon sold.
How to file business taxes, step by step
Filing feels heavier than it is, mostly because there are several filings rather than one. The process below is the general path; your exact forms depend on the entity type from earlier.
- Confirm your entity structure. This dictates every form that follows. If you formed an LLC but elected S-corp treatment, file as an S corp.
- Assemble your records. Income statements, expense documentation, payroll reports, asset registers, and prior-year returns. Pass-throughs need owner detail; corporations need balance sheets.
- Calculate taxable income. Net revenue against deductible expenses, then apply depreciation, credits, and carryforwards. This is where a good preparer earns their fee.
- Complete the correct return. Schedule C, Form 1065, 1120-S, or 1120, plus state returns and any K-1s owners need for their own filings.
- File and pay on time. E-file for speed and confirmation. If you cannot complete the return, file an extension but an extension to file is not an extension to pay.
Deadlines and the cost of missing them
Because obligations are staggered, the safest habit is a tax calendar rather than a single reminder. The headline federal dates for the most common filings:
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Filing
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Typical federal deadline
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Notes
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Partnership (1065) & S-corp (1120-S) returns
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15th day of the 3rd month after year-end (March 15 for calendar-year filers)
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K-1s must reach owners by the same date
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C-corp (1120) returns
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15th day of the 4th month after year-end (April 15 for calendar-year filers)
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Aligns with individual returns
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Estimated quarterly income tax
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Roughly April, June, September, and January
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Required if you expect to owe over the threshold
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Payroll tax deposits
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Monthly or semi-weekly, by IRS schedule
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Roughly April, June, September, and January
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Sales tax remittance
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Monthly, quarterly, or annually by state
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Filing may be due even with zero sales
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When a deadline lands on a weekend or holiday it generally rolls to the next business day. Always confirm the current year’s dates on IRS.gov and with your state authority, since they shift slightly each year. Penalties scale with how late you are and apply per filing and for payroll, missing a deposit can reach the people responsible personally. Filing on time is always cheaper than the alternative.
Seven mistakes that cost businesses real money
Mistake 01
Mixing business and personal finances.
Commingled accounts make deductions hard to defend and pierce the liability protection of an LLC or corporation.
Mistake 02
Treating withheld payroll tax as cash flow.
It is held in trust. Borrowing against it invites the steepest penalties in the code.
Mistake 03
Ignoring economic nexus.
Crossing a state’s sales threshold creates a collection duty you may not notice until an audit.
Mistake 04
Skipping estimated payments.
Waiting until filing to pay income tax triggers underpayment penalties even if you pay in full eventually.
Mistake 05
Forgetting business personal property.
Many owners file real estate property tax but overlook the separate return on equipment and fixtures.
Mistake 06
Missing deductions and credits.
R&D, energy, and hiring credits go unclaimed simply because no one looked.
Mistake 07
Using a stale or unsupported valuation.
Where a transaction or equity event depends on fair market value, an out-of-date figure undermines the whole filing.
Frequently asked questions
It depends on the business, but most pay some combination of income tax (through the entity or the owners), payroll tax once they have employees, and sales tax if they sell taxable goods or services. Property and excise taxes apply to specific situations. The starting point is always your entity type, which decides how income tax flows.
Usually not at the federal level. A single-member LLC is taxed like a sole proprietorship and a multi-member LLC like a partnership, so profit passes through to the owners’ personal returns. An LLC can elect to be taxed as an S corp or C corp, which changes this. State treatment varies, and some states charge LLCs a separate fee or franchise tax.
Sales tax is collected by the seller at the point of sale. Use tax is the mirror image: you owe it directly when you buy something taxable from out of state and no sales tax was charged. Together they ensure a purchase is taxed once, regardless of where the seller sits.
If you expect to owe more than the IRS threshold for the year and tax is not being withheld for you, then generally yes. Skipping estimated payments can trigger an underpayment penalty even if you pay the full balance at filing. Pass-through owners often need to make these on their personal returns.
Penalties and interest apply, and they scale with how late you are and which tax is involved. Late payroll deposits carry the harshest treatment because the funds are held in trust. Filing on time or filing an extension while still paying what you can keeps exposure as low as possible.
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