Most founders spend more time choosing a logo than choosing a tax structure. That's backwards. The entity you form, where you form it and how you pay yourself decide how much of every dollar of profit you keep, and some of those choices are expensive to reverse.
This guide covers the decisions that matter in the first three years. It uses US federal rules for the 2026 tax year as the baseline because most venture-backed startups still incorporate in Delaware, then shows how the picture changes elsewhere.
The three decisions that drive your tax bill
1. Entity type
Your entity determines whether profit is taxed once or twice.
| Entity | How profit is taxed | Best for |
|---|---|---|
| Sole proprietor | Once, on your personal return, plus 15.3% self-employment tax | Testing an idea, freelancing |
| LLC (default) | Once, passed through to owners | Small profitable businesses, real estate |
| LLC taxed as S corp | Once, with salary/distribution split to reduce payroll tax | Profitable owner-operators earning $80k+ |
| C corporation | Twice: 21% at company level, then again on dividends | Venture-backed startups, QSBS planning |
If you plan to raise venture capital, form a C corporation. Investors want preferred stock, option pools and a clean cap table, and most funds cannot hold LLC interests without tax headaches for their own limited partners. See our LLC and Corporation guides for the details.
2. Location
The US federal corporate rate is a flat 21%, but state rates add anywhere from 0% to 11.5%. A company headquartered in Texas pays no state corporate income tax but owes the franchise (margin) tax once revenue passes the no-tax-due threshold. One in New Jersey can pay 11.5% on large profits. Where you incorporate (often Delaware) and where you operate are separate questions: you pay income tax where you have nexus, which usually means where your people and customers are.
Outside the US, headline rates range from zero in the Cayman Islands to over 35% in France once surcharges are included. Use our comparison tool to put any set of countries side by side.
3. How you pay yourself
In a C corporation, you have two ways to take money out:
- Salary: deductible to the company, taxed as wages to you, subject to 7.65% employee and 7.65% employer payroll taxes up to the Social Security wage base.
- Dividends: not deductible, so profit is taxed at 21% first, then qualified dividends are taxed at 0%, 15% or 20% plus the 3.8% net investment income tax for higher earners.
Combined, a dollar of corporate profit paid out as a dividend to a top-bracket founder faces roughly 39.8% federal tax (21% + 79% × 23.8%). That is why most early-stage founders reinvest profit rather than distribute it.
2026 federal numbers founders should know
| Item | 2026 amount |
|---|---|
| Corporate income tax rate | 21% flat |
| Top individual rate | 37% on income over $640,600 (single) |
| Standard deduction | $16,100 single / $32,200 joint |
| Qualified business income (QBI) deduction | 20%, made permanent by the OBBBA |
| Self-employment tax | 15.3% up to the wage base, 2.9% above |
| Long-term capital gains | 0% / 15% / 20%, plus 3.8% NIIT |
| Bonus depreciation | 100%, made permanent for property acquired after Jan 19, 2025 |
| Domestic R&D expensing | Immediate under Section 174A |
Source: IRS Revenue Procedure 2025-32 and the One Big Beautiful Bill Act (Public Law 119-21).
Equity and exits
Qualified Small Business Stock (Section 1202)
QSBS is the most valuable tax break available to founders. If you hold original-issue stock in a qualifying C corporation, part or all of your gain on sale is excluded from federal tax. For stock issued after July 4, 2025:
- 50% exclusion after 3 years, 75% after 4 years, 100% after 5 years
- Cap rises to the greater of $15 million or 10x your basis (indexed from 2027)
- The company's aggregate gross assets must be $75 million or less when the stock is issued
LLCs and S corporations do not qualify. Converting an LLC to a C corporation starts the clock at conversion, so early incorporation can be worth millions. Some states, including California, do not follow the federal exclusion.
The 83(b) election
Founder stock usually vests over four years. Without an 83(b) election, each vesting tranche is taxed as ordinary income at its value on the vesting date. If the company has grown, that bill can be huge and you'll have no cash to pay it. Filing an 83(b) within 30 days of the grant locks in tax on the grant-date value, usually a fraction of a cent per share, and starts your capital gains holding period.
Deductions founders miss
- R&D credit: Startups with less than $5 million in gross receipts can apply up to $500,000 per year of the research credit against the employer share of payroll tax, even before they are profitable.
- Section 174A expensing: Domestic software development and research costs are deductible immediately again from 2025.
- Startup costs: Up to $5,000 of startup and $5,000 of organizational costs can be deducted in year one, with the remainder amortized over 15 years.
- Home office and equipment: 100% bonus depreciation and Section 179 expensing cover laptops, servers and furniture.
- State R&D credits: Many states offer their own research credits on top of the federal one.
Going international
If you are a non-US founder, or a US founder hiring abroad, keep three rules in mind:
- Permanent establishment: Hiring an employee who signs contracts in another country can create a taxable presence there.
- Controlled foreign corporation rules: US shareholders of foreign subsidiaries may owe tax on certain foreign profits under Subpart F and net CFC tested income (formerly GILTI) even if nothing is distributed.
- Global minimum tax: Pillar Two's 15% minimum applies only to groups with €750 million or more in revenue, so it rarely affects startups directly.
Our International Tax guide covers these in more depth.
A simple checklist for year one
- Form a Delaware C corporation if you plan to raise venture capital; otherwise, an LLC in your home state.
- File 83(b) elections within 30 days of founder stock grants.
- Register for state taxes where you have employees.
- Track R&D spending from day one to support credit claims.
- Pay yourself a reasonable salary through payroll once there is revenue.
- Keep QSBS records: issue dates, gross asset tests and the active business requirement.
Run your own numbers with our country calculators, starting with the United States, or browse state-by-state business taxes.
Frequently Asked Questions
Should a startup founder take a salary or dividends?
In a C corporation, salary is deductible to the company but subject to payroll taxes, while dividends are not deductible and are taxed again at the shareholder level (0%, 15% or 20% federally for qualified dividends, plus 3.8% NIIT at higher incomes). Most venture-backed founders take a modest salary and leave profits in the company. In an S corporation, owners must pay themselves reasonable compensation before taking distributions.
What is QSBS and why does it matter for founders?
Qualified Small Business Stock under IRC Section 1202 lets you exclude gain on the sale of stock in a qualifying domestic C corporation. For stock issued after July 4, 2025, the exclusion is 50% after three years, 75% after four and 100% after five, capped at the greater of $15 million or 10 times your basis, and the company's gross assets must not exceed $75 million when the stock is issued.
Do I need to file an 83(b) election?
If you receive restricted stock that vests over time, an 83(b) election filed with the IRS within 30 days of the grant lets you pay tax on the value at grant (often close to zero) rather than as each tranche vests. Missing the 30-day window cannot be fixed later.
Which country has the lowest corporate tax for startups?
Several jurisdictions charge zero corporate income tax (Cayman Islands, Bahamas, Bermuda for groups under the Pillar Two threshold) and others offer low headline rates such as Hungary at 9%, Bulgaria at 10% and Ireland at 12.5% for trading income. Headline rate is only one factor: investor expectations, banking, talent and treaty access usually matter more for a venture-backed company.
Can I deduct R&D costs in 2026?
Yes. The One Big Beautiful Bill Act restored immediate expensing of domestic research and experimental expenditures under new Section 174A for tax years beginning after December 31, 2024. Foreign research costs must still be amortized over 15 years. Small businesses can also claim the R&D credit against up to $500,000 of payroll tax per year.