Payroll Tax Calculator

Payroll taxes are one of the largest — and most commonly misunderstood — expenses for growing companies. This payroll tax calculator helps founders, finance leaders, and operators estimate employer payroll taxes based on wages paid to employees. For small to medium sized businesses (SMBs) and startups, understanding payroll tax obligations is essential for accurate budgeting, hiring decisions, and maintaining compliance as your company grows.

Calculation questions

How do you calculate payroll tax?

Short answer: Payroll taxes are calculated by applying federal payroll tax rates to employee wages, including Social Security, Medicare, and federal unemployment tax.

Employers must calculate payroll taxes using a combination of employer-paid taxes and employee-withheld taxes. The most common federal payroll taxes include:

• Social Security tax: 6.2% employer + 6.2% employee (12.4% total)
• Medicare tax: 1.45% employer + 1.45% employee (2.9% total)
• Federal unemployment tax (FUTA): 6.0% on the first $7,000 of wages per employee (often reduced to 0.6% with state credits)

Basic payroll tax formula:

Employer Payroll Tax =
(Employee Wages × Social Security Rate) +
(Employee Wages × Medicare Rate) +
(Taxable Wages × FUTA Rate)

Example:

• Employee salary: $80,000
• Social Security (6.2%) = $4,960
• Medicare (1.45%) = $1,160
• FUTA (0.6% of first $7,000) = $42

Estimated employer payroll tax = $6,162

Accurate calculations are essential for forecasting true hiring costs — something many early-stage founders underestimate when modeling burn rate.

What wages are subject to payroll taxes?

Short answer: Most employee compensation is subject to payroll taxes, including salaries, hourly wages, bonuses, and commissions.

Payroll tax generally applies to:

• Salary and hourly wages
• Bonuses and commissions
• Cash tips reported by employees
• Certain fringe benefits

Some compensation may be excluded from specific taxes depending on the benefit structure. For example, certain retirement contributions or qualified reimbursements may not be subject to payroll tax.

Understanding which compensation types are taxable helps startups forecast true compensation costs when building compensation plans.

What is the Social Security wage base limit?

Short answer: Social Security tax applies only up to the annual wage base limit, which is $176,100 for 2026.

Once an employee's wages exceed the wage base limit, employers stop paying the 6.2% Social Security tax on additional earnings.

Example:

• Employee salary: $200,000
• Taxable Social Security wages = $176,100
• Employer Social Security tax = $176,100 × 6.2%
• Total = $10,918.20

Medicare tax, however, continues on all wages with no wage cap.

Tracking this threshold is important for accurate payroll forecasting, especially for startups with high-salary technical teams.

What taxes are included in employer payroll tax?

Short answer: Employer payroll taxes include Social Security, Medicare, and federal unemployment taxes.

Employers typically pay:

• Social Security tax (6.2%)
• Medicare tax (1.45%)
• Federal unemployment tax (FUTA)

Additional payroll taxes may include:

• State unemployment insurance (SUI)
• Local payroll taxes (in certain jurisdictions)

Many founders initially focus only on salary expenses. But employer payroll taxes typically add 7–10%+ to total payroll costs before benefits are included.

Entity-type questions

Do S corporations pay payroll tax?

Short answer: Yes. S corporations must pay payroll tax on reasonable compensation paid to shareholder-employees.

S corporation owners often split compensation between:

• Salary (subject to payroll taxes)
• Distributions (not subject to payroll taxes)

The IRS requires that shareholder-employees receive reasonable compensation for services performed. Underpaying salary to avoid payroll taxes can trigger audits and penalties.

For growing startups, determining the right salary vs distribution mix often requires tax planning beyond a simple calculator.

Do LLC owners pay payroll tax?

Short answer: It depends on the tax classification of the LLC.

Payroll tax treatment varies by structure:

• Single-member LLC (default): owner income subject to self-employment tax
• Partnership LLC: members pay self-employment tax on earnings
• LLC taxed as S corporation: payroll tax applies only to salary portion

Example:

LLC owner profit: $120,000

If taxed as sole proprietor:

• Self-employment tax = 15.3% on earnings

If taxed as S corp:

• Payroll tax applies only to salary portion

Choosing the right structure can significantly affect tax obligations.

Do C corporations pay payroll tax?

Short answer: Yes. C corporations pay payroll tax on all employee wages, including founder salaries.

C corporations must withhold and pay:

• Social Security tax
• Medicare tax
• Federal unemployment tax

Unlike pass-through entities, C corporation owners typically receive compensation as W-2 employees. This means payroll tax planning becomes part of broader financial strategy as the team grows.

Do contractors trigger payroll tax?

Short answer: No. Employers generally do not pay payroll taxes for independent contractors.

Instead:

• Contractors receive Form 1099-NEC
• Contractors pay their own self-employment taxes

However, misclassifying employees as contractors can lead to significant penalties. If a worker meets the IRS criteria for employment — such as behavioral control or economic dependence — payroll tax obligations may apply.

For startups scaling quickly, worker classification is a common compliance risk.

Cost & deduction questions

How much do payroll taxes cost employers?

Short answer: Federal employer payroll taxes typically equal 7.65% of employee wages, plus unemployment taxes.

Employer payroll tax components include:

• Social Security: 6.2%
• Medicare: 1.45%
• FUTA: typically 0.6% effective rate

Example:

Employee salary: $100,000

• Social Security = $6,200
• Medicare = $1,450
• FUTA = $42

Total employer payroll tax ≈ $7,692

State unemployment taxes may increase the total cost.

For many startups, the true cost of hiring is often 10–15% higher than salary alone once payroll taxes and benefits are included.

Are payroll taxes tax deductible for businesses?

Short answer: Yes. Employer payroll taxes are generally deductible as a business expense.

Deductible payroll tax expenses typically include:

• Employer Social Security contributions
• Employer Medicare contributions
• Federal unemployment tax
• State unemployment tax

Employee-withheld taxes are not deductible because they are collected on behalf of the government.

Tracking these deductions correctly improves tax efficiency and ensures accurate financial reporting.

Are bonuses subject to payroll tax?

Short answer: Yes. Bonuses are considered supplemental wages and are subject to payroll taxes.

Bonuses are taxed using the same payroll tax rates as regular wages:

• Social Security tax
• Medicare tax
• Federal income tax withholding

Employers may apply either:

• Flat supplemental tax rate withholding
• Aggregate method with regular wages

Bonus planning can affect payroll tax timing and cash flow, especially for growing teams.

Do employee benefits affect payroll tax calculations?

Short answer: Some employee benefits are taxable while others are exempt from payroll taxes.

Examples:

Taxable benefits:

• Cash bonuses
• Certain fringe benefits

Often exempt:

• Health insurance premiums paid by employer
• Qualified retirement plan contributions
• Health savings account (HSA) contributions

Benefit design can meaningfully affect payroll tax exposure and total compensation costs.

Filing & compliance questions

When are payroll taxes due?

Short answer: Payroll taxes are typically deposited either monthly or semiweekly depending on employer size.

Deposit schedules depend on total payroll tax liability.

Common schedules:

• Monthly depositors: taxes due by the 15th of the following month
• Semiweekly depositors: taxes due within several days of payroll

Employers must also file quarterly payroll tax reports using Form 941.

As payroll grows, deposit schedules may change, making accurate forecasting important for cash flow planning.

What forms are used to report payroll taxes?

Short answer: Employers report payroll taxes using several IRS forms.

Key payroll tax forms include:

• Form 941 — quarterly payroll tax return
• Form 940 — federal unemployment tax return
• Form W-2 — employee wage reporting
• Form W-3 — transmittal summary of W-2s

Accurate reporting ensures payroll taxes align with wages reported to employees and the IRS.

What happens if payroll taxes are paid late?

Short answer: Late payroll tax payments can trigger significant IRS penalties and interest.

Penalties may include:

• 2% penalty for deposits 1–5 days late
• 5% penalty for deposits 6–15 days late
• 10% or higher for larger delays

Because payroll taxes are considered trust fund taxes, the IRS can pursue responsible individuals personally for unpaid amounts.

For founders, payroll tax compliance is one area where operational mistakes can quickly escalate into legal risk.

How often do payroll tax rates change?

Short answer: Payroll tax rates change infrequently, but wage limits and thresholds may update annually.

Examples of updates include:

• Social Security wage base adjustments
• Unemployment tax changes
• State payroll tax updates

Keeping payroll systems updated ensures accurate calculations and prevents underpayment penalties.

Concept clarification questions

What is the difference between payroll tax and income tax?

Short answer: Payroll taxes fund Social Security and Medicare, while income tax funds general government operations.

Key differences:

Payroll taxes:

• Fixed percentage rates
• Split between employer and employee
• Fund entitlement programs

Income taxes:

• Based on progressive tax brackets
• Paid by individuals
• Fund general federal spending

Understanding the difference helps founders model employee compensation and total payroll expenses.

What is the difference between employer payroll tax and employee payroll tax?

Short answer: Employer payroll taxes are paid by the company, while employee payroll taxes are withheld from employee paychecks.

Example breakdown:

Employee salary: $100,000

Employee pays:

• 6.2% Social Security
• 1.45% Medicare

Employer also pays:

• 6.2% Social Security
• 1.45% Medicare

This shared structure is why payroll taxes effectively add about 7.65% to payroll costs for employers.

What is self-employment tax?

Short answer: Self-employment tax is the equivalent of payroll tax for self-employed individuals.

Self-employed individuals must pay:

• 12.4% Social Security
• 2.9% Medicare

Total self-employment tax rate = 15.3%

Because self-employed workers pay both the employer and employee portions, their total payroll-equivalent tax is higher.

Why do startups need accurate payroll tax forecasting?

Short answer: Payroll taxes directly impact hiring costs, burn rate, and financial planning.

For growing companies, payroll is typically the largest operating expense. Even small calculation errors can distort:

• Runway forecasts
• Hiring budgets
• Cash flow planning

A payroll tax calculator is a starting point — but scaling companies often need deeper financial visibility to support confident decisions.

Financial clarity matters as your company grows

Payroll tax calculations help founders understand the real cost of hiring. But numbers alone rarely tell the full story.

As startups scale, payroll taxes connect directly to broader financial questions: burn rate, runway, hiring velocity, and long-term tax strategy. Accurate calculations are only the foundation for those decisions.

Pilot works with thousands of startups and SMBs to bring clarity to these financial systems. Our team combines experienced accountants, CFO advisors, and purpose-built technology to help companies stay compliant while building smarter financial infrastructure. Companies supported by Pilot have raised more than $9.1B in capital, and we’ve helped founders navigate the financial complexity that comes with growth.

Pilot. Accounting so good you can mind your own business. Advisory so good you can build your future.