What Is Payroll Tax? How It Works for US Employers

Payroll tax is the combined set of taxes tied to employee wages: the amounts you withhold from each worker's paycheck (their share of Social Security and Medicare, plus federal and state income tax) and the employer's own matching contributions (your half of Social Security and Medicare, plus federal and state unemployment tax). You collect it, you're legally responsible for depositing it with the IRS and your state on a strict schedule, and it moves off your books fast — which is exactly why so many otherwise-healthy businesses get squeezed by it.

In plain operator terms: for most small employers, every dollar of gross wages carries roughly 7.65 cents of employer FICA on top, plus unemployment taxes, and you're also a pass-through collector for a much larger chunk that belongs to the government the moment it's withheld. Miss a deposit and the penalties are among the harshest the IRS levies. This guide breaks down every component, the deposit calendar, and the cash-flow moves — including revenue-based funding — that keep payroll tax from becoming a solvency problem.

The Two Halves of Payroll Tax: Employee-Paid vs. Employer-Paid

Payroll tax isn't one line item — it's a stack of separate taxes, some paid by the worker (you just withhold and forward them) and some paid by you as the employer out of your own pocket.

What you withhold from the employee

• Employee Social Security — 6.2% of wages up to the annual wage base.
• Employee Medicare — 1.45% of all wages, with an extra 0.9% Additional Medicare Tax on high earners (this surtax is employee-only; you don't match it).
• Federal income tax — based on the worker's Form W-4.
• State and local income tax — where applicable (states like Florida, Texas, and Nevada have no state income tax; most others do).

What you pay as the employer

• Employer Social Security — 6.2%, matching the employee.
• Employer Medicare — 1.45%, matching the employee (no match on the 0.9% surtax).
• FUTA (federal unemployment) — 6.0% on the first $7,000 of each employee's wages, but a standard 5.4% credit for paying state unemployment on time drops the effective rate to 0.6% in most states.
• SUTA/SUI (state unemployment) — an experience-rated percentage that varies by state and by your own layoff history.

The employee-side Social Security and Medicare (the 6.2% + 1.45%) plus the employer match together make up FICA. That combined 15.3% of covered wages is the number most owners feel first.

Trust Fund Taxes: Why This Money Is Never Really Yours

Here is the concept that separates payroll tax from almost every other business obligation, and the one that trips up owners in a cash crunch. The income tax and the employee's share of FICA that you withhold are called trust fund taxes. The IRS's view is that this money never belonged to your business — you're holding it in trust for the employee and the government from the instant the paycheck is cut.

Because of that, if the business fails to remit trust fund taxes, the IRS can assess the Trust Fund Recovery Penalty (TFRP) — 100% of the unpaid trust fund amount — personally against any "responsible person" who willfully failed to pay: an owner, officer, bookkeeper, or check-signer. An LLC or corporation does not shield you from it. This is why the operator rule is absolute: never borrow from withheld payroll taxes to cover other bills. It feels like available cash sitting in your account. It is not. If you're ever choosing between making payroll tax deposits and covering a supplier or rent, that's a signal to solve the cash-flow gap with financing — not to dip into trust fund money.

When Payroll Taxes Are Due: The Deposit Schedule

The IRS assigns you a deposit frequency based on your prior payroll tax history (your "lookback period"). Most small employers land in one of two buckets:

• Monthly depositor — deposit by the 15th of the following month for the prior month's payroll.
• Semiweekly depositor — larger employers; deposits are due Wednesday or Friday depending on your payday.
• Next-day rule — accumulate $100,000 or more in tax liability on any single day and it's due the next business day, regardless of your normal schedule.

Deposits go through the EFTPS (Electronic Federal Tax Payment System). You then reconcile quarterly on Form 941 (or annually on Form 944 for the smallest employers), report FUTA annually on Form 940, and issue W-2s to employees and a W-3 summary to the SSA each January. State deposit and filing schedules run in parallel and have their own calendars.

The penalty structure is steep and tiered: roughly 2% for deposits 1–5 days late, 5% for 6–15 days, 10% for more than 15 days, and up to 15% once the IRS issues a notice. Late-deposit penalties compound fast, which is why funding a short gap is almost always cheaper than eating a stack of penalties.

A Realistic Payroll Tax Cost Example

The table below shows, for example, how the employer's own payroll tax burden stacks on top of a single employee's gross pay. Figures are illustrative and use common rates; your SUTA rate and state rules will shift the totals.

The takeaway for planning: budget roughly 8–10% on top of gross wages for the employer share alone in a typical state, then remember you're also the collection point for the withheld employee share and income tax — a far larger sum that must be deposited on time. A business running $60,000 in monthly gross payroll is moving a substantial five-figure tax obligation through its bank account every single cycle.

The Cash-Flow Problem Payroll Tax Creates

Payroll tax is unforgiving in a way that trade credit isn't. A supplier might wait a week; the IRS deposit clock does not. The stress shows up in predictable situations:

• Seasonal revenue, year-round payroll — a landscaper, HVAC shop, or coastal restaurant collects most revenue in a few months but owes payroll tax every pay period.
• Slow-paying customers (net-30/60/90) — you've done the work and made payroll, but the receivable hasn't landed, while the tax deposit is due now.
• A big new contract — you staff up ahead of the revenue, so payroll and its taxes hit before the customer's first check clears.
• An unexpected gap — a lost client, an equipment failure, a slow month — and suddenly the withheld taxes look tempting to "borrow."

The right move in every one of these is to treat payroll tax as untouchable and bridge the gap with outside cash. That's where revenue-based financing fits: it's underwritten on the deposits already flowing through your bank account, so it can be structured to move at the same speed the tax deadlines do. See our pillar guide on business funding options for small businesses for how this sits alongside term loans and lines of credit, and our overview of working capital financing for shorter cash-flow gaps.

Decision Framework: Financing a Payroll Tax Gap

Not every payroll tax squeeze should be solved with financing. Here's the operator's read on when revenue-based funding (an MCA-style advance underwritten on bank deposits and revenue) is the right tool — and when it isn't.

Revenue-based funding works best when

• The gap is a timing problem, not a solvency problem — you have real, recurring revenue and a receivable or busy season on the way.
• You need speed. Approvals here run on bank statements, so funding can land in 24–48 hours — fast enough to make a deposit deadline and avoid stacking penalties.
• Your credit is thin or bruised (FICO 500+ is workable) because approval leans on deposits and revenue over credit score.
• You do at least ~$10,000+/month in revenue and want a repayment that flexes with your daily or weekly sales rather than a rigid bank amortization.
• The alternative is a Trust Fund Recovery Penalty or compounding late-deposit penalties — a defined, expensive downside that funding cleanly avoids.

Avoid it / look elsewhere when

• The shortfall is structural — payroll is simply larger than the business can support. Financing a permanent gap deepens the hole; the fix is right-sizing payroll or pricing.
• You qualify for cheaper capital and have time to wait — an SBA loan or a bank line of credit will carry a lower cost of capital if the deadline isn't days away.
• You've already fallen behind with the IRS and need a resolution — an IRS installment agreement or a conversation with a tax professional may be the better path before adding financing.
• Your revenue is too irregular to support a consistent remittance schedule without creating the next crunch.

Rule of thumb: use revenue-based funding to buy time against known incoming cash, never to paper over a business that can't cover its own labor. And no legitimate funder can guarantee approval — anyone who does is a red flag.

Payroll Tax vs. Income Tax: A Common Point of Confusion

Owners often lump these together, but they behave very differently for cash planning. Payroll tax is tied to wages, split between employee and employer, and deposited continuously throughout the year on a strict schedule — you can't defer it to April. Business income tax is levied on profit, paid by the business (or passed through to the owner), and typically handled via quarterly estimates and an annual return.

The practical difference: you can sometimes negotiate timing on income tax through estimates and extensions, but payroll tax deposits are hard deadlines with personal liability attached. When money is tight, that hierarchy matters — payroll tax deposits, especially the trust fund portion, sit at the very top of the priority list, above nearly every other obligation the business has.