You hand a crew member an envelope of bills on Friday afternoon. It feels simple, fast, and final. But here is the question that decides whether that envelope is a perfectly legal payroll method or the start of a very expensive problem: did you withhold taxes, record the payment, and report it — exactly as if you had written a check?
The IRS does not care whether wages travel by direct deposit, paper check, or folding cash. Cash wages are wages. Every withholding, deposit, and reporting rule in Publication 15 (Circular E), the Employer's Tax Guide, applies to them in full. What the law punishes is not the cash — it is the missing paper trail.
Cash Pay Is a Payment Method; Off the Books Is a Crime
These two ideas get tangled together because they often show up at the same business. Untangle them:
- Paying in cash means the medium is currency. Legal, as long as every tax obligation is met.
- Paying off the books (sometimes called "under the table") means no withholding, no records, no reporting. Illegal, regardless of the medium. A direct deposit with no withholding or reporting is just as off the books as an envelope of cash.
The legal responsibility sits entirely on you as the employer. If a worker asks to be paid off the books — to dodge garnishment, keep benefits, or avoid taxes — agreeing does not transfer the risk to them. You remain liable for the unwithheld taxes, plus penalties and interest. "The employee asked for it" is not a defense the IRS recognizes.
What Publication 15 Still Requires for Cash Wages
Think of compliant cash payroll as regular payroll with one extra step at the end (the handoff). Nothing upstream changes.
1. Collect Form W-4 before the first cash payday
Every new employee — cash-paid or not — should give you a signed Form W-4 when they start. You use it with the withholding tables in Publication 15-T to figure federal income tax withholding. No W-4 on file does not mean no withholding is due; it means you withhold at the default rate for someone who never turned one in.
2. Withhold exactly as you would from a check
From each cash payment, set aside before the money reaches the employee's hands:
- Federal income tax, per the W-4 and withholding tables.
- The employee's share of FICA: 6.2% Social Security (up to the annual wage base) plus 1.45% Medicare, for a combined 7.65%. High earners also owe an additional 0.9% Medicare tax on wages above $200,000, which the employer withholds but does not match.
- State and local income tax withholding, where your state requires it.
Then add your employer-side obligations on top: matching 7.65% FICA, plus federal unemployment tax (FUTA) — 6% on the first $7,000 of each employee's wages, usually reduced to 0.6% by the state-unemployment credit — plus state unemployment insurance and any state disability or paid-leave contributions.
A practical consequence owners miss: if you promised someone "$800 cash, flat," that $800 is gross wages, not take-home. You must gross up the math — compute withholding on $800, hand over the net, and remit the difference plus your employer share out of your own pocket. Promising round-number cash amounts without doing this math is how businesses quietly fall behind.
3. Deposit withheld taxes on schedule — through the bank, not in cash
Withheld income tax and both halves of FICA are "trust fund" taxes: you are holding the government's money in trust from the moment you pay the wage. You remit them electronically (generally through EFTPS) on either a monthly or semiweekly schedule, determined by your lookback-period liability. Very small employers whose quarterly liability stays under $2,500 may pay with their quarterly return instead.
Note the discipline this imposes: you cannot operate a cash payroll with a cash-only mindset. The deposit leg of the system is electronic and calendared, and missing deposits triggers failure-to-deposit penalties that scale from 2% up to 15% depending on lateness.
4. Report quarterly and annually, like everyone else
- Form 941 every quarter, reconciling wages paid, income tax withheld, and both shares of Social Security and Medicare tax.
- Forms W-2 and W-3 after year-end: furnish W-2s to employees by January 31 and file with the Social Security Administration by January 31.
- Keep all employment tax records — amounts, dates, W-4s, deposit confirmations — for at least four years after the tax becomes due or is paid, whichever is later.
The Pay Stub Problem Nobody Plans For
Here is where cash payroll most often breaks down in practice, and it has nothing to do with the IRS. Most states require you to furnish an itemized wage statement every payday — showing gross pay, hours, rates, deductions, and net pay — and the requirement explicitly covers cash.
- California requires an accurate itemized statement furnished separately in writing when wages are paid by cash or personal check.
- New York requires a wage statement every payday, whether payment is by cash or by check, showing gross and net wages, deductions, hours, and rate.
A cash payment with no stub violates these laws on its face, and it leaves you defenseless in the dispute that cash invites: "You shorted me $100 last Friday." Without a signed, itemized receipt, that argument is your word against theirs — in front of a labor commissioner who already suspects the worst. Every cash handoff should come with a written stub and a signed acknowledgment of receipt, filed with your payroll records.
What "Off the Books" Actually Costs When It Unravels
Businesses drift off the books because it feels cheaper in the moment — no employer payroll taxes, no filings, no paperwork. The eventual bill runs in the opposite direction:
- Back taxes you should have withheld and matched. The IRS can assess the full employment tax liability against you, including the employee's share you failed to withhold.
- Stacked penalties. Failure to file, failure to pay, and failure to deposit each carry their own penalty, plus interest that compounds daily until the balance is paid.
- The Trust Fund Recovery Penalty. Under Internal Revenue Code section 6672, any responsible person who willfully fails to collect or pay over trust fund taxes is personally liable for 100% of the unpaid amount. This pierces the corporate veil by design — owners, officers, and check-signers can owe it from personal assets.
- State consequences in parallel. Unpaid unemployment insurance, workers' compensation exposure for unreported payroll (auditors routinely reclassify it at the highest-risk rate class), and state wage-payment penalties.
- No control over discovery. You only need one trigger: a worker files for unemployment or workers' comp, gets hurt on the job, reports the income on their own return to qualify for a loan or the earned income credit, or simply reports you after a falling-out. Misclassification and cash-payroll audits also surface workers the employer thought were invisible.
And the criminal exposure is real at the extreme end: willful failure to collect or pay over tax is a federal offense, and states prosecute payroll fraud as theft of withheld wages. Routine cases end in money, not handcuffs — but the statute books allow worse, which is why "everyone does it" is not a compliance strategy.
A Compliant Cash-Payroll System in Six Steps
If your workforce genuinely needs cash — unbanked workers, remote sites, day labor — build this:
- Onboard on paper. Signed W-4, state withholding form, and I-9 like any other hire. Verify work authorization regardless of payment method.
- Run a real payroll calculation. Use payroll software or the Publication 15-T tables to compute withholding per payment. Never work backward from a round number without grossing up.
- Split the cash before payday. Separate the employee's net pay from the tax money you are holding in trust. The trust money is never yours to spend, even briefly.
- Deposit electronically, on schedule. Enroll in EFTPS and remit on your monthly or semiweekly schedule. Calendar every date.
- Hand over pay with a stub; get a signature. Itemized statement plus signed receipt, every time, for every worker. File both.
- File everything. Quarterly Form 941, annual W-2s, state returns, new-hire reporting. Reconcile the four 941s against the W-3 at year-end — mismatch notices are how quiet cash top-ups get loud.
One more boundary to respect: this guide covers employees. Different rules apply to household employees (Schedule H territory) and to genuine independent contractors paid in cash (Form 1099-NEC reporting, no withholding in most cases). Misclassifying employees as contractors and paying cash is two violations stacked, not a loophole.
Keep Your Payroll Records Audit-Ready From Day One
Cash payroll lives or dies on documentation. The businesses that survive payroll audits are not the ones with clever arguments — they are the ones whose books show every dollar: gross wages computed, taxes withheld, deposits made, returns filed, receipts signed. Accurate bookkeeping from day one turns cash from a liability into just another payment method, and reconciling your payroll register against bank withdrawals and filed returns each quarter catches discrepancies while they are still small.
Simplify Your Financial Management
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