Payroll software has gotten good. Gusto, ADP RUN, QuickBooks Payroll — for the typical small business with W-2 employees and no surprises, $50–100 a month buys you tax filings, direct deposit, and W-2s in January. There is no compelling reason to do it yourself with paper checks and Form 941 in 2026.
But "use payroll software" is not the same as "payroll is solved." Software handles the mechanics. It doesn't handle the decisions and edge cases that make small-business payroll go sideways.
What payroll software does well
- Calculates wages, federal/state withholding, and FICA for a standard W-2 employee
- Files quarterly 941s and annual 940s, plus state equivalents
- Issues W-2s and W-3 in January
- Handles direct deposit and pay stubs
- Tracks PTO accruals if you set it up
What payroll software doesn't do
- Reasonable compensation analysis for S-Corp owners. The software will run any salary you enter. It can't tell you the salary is too low to survive an IRS audit (more on this in a separate article).
- Multi-state employees. If you have a remote employee in another state, the software can usually handle the mechanical filings — but only if you've registered as an employer in that state, which is its own multi-month process.
- Independent contractor vs. employee classification. Misclassifying a worker as a 1099 to save FICA is the single biggest payroll-side audit risk. The software won't push back if you're doing it.
- Owner W-2 versus draw versus distribution. Software runs whatever you tell it to run. A misallocation here is the #1 source of S-Corp tax-prep cleanup work we see.
- Garnishments, child support, and benefit withholding beyond a basic 401(k) deferral. Most platforms support them, but the setup is fiddly and the consequences of an error involve a court instead of just the IRS.
The actual decision tree
When a client asks "should I run payroll myself?" we usually walk them through three questions:
Question 1: How many employees?
1 employee (often the owner of an S-Corp): payroll software is fine, but you need a CPA to set the salary and watch year-end reconciliation.
2–10 employees: payroll software is fine; budget for an hour of CPA time per quarter to spot-check the 941s before they file.
10+ employees: payroll software is still fine, but you should consider whether HR/benefits administration starts to need a separate tool or service. A bookkeeper or fractional HR person becomes worth their cost around here.
Question 2: How many states?
1 state: easy. 2 states: doable if you're patient through the registration. 3+ states: get help. Each state has its own withholding registration, unemployment registration, paid leave registration, sometimes city-level payroll tax registration. The setup work alone runs 30+ hours per state.
Question 3: How exotic is the comp?
Salary + standard benefits: handle it yourself. Equity comp, deferred comp, fringe benefits like personal use of a company car, owner health insurance: stop. These need a CPA's hand on the W-2.
Where the real penalties are
The reason payroll feels disproportionately scary for what it is: penalties for late or incorrect payroll tax deposits are some of the steepest in the IRS code. Late deposit penalty starts at 2% and scales to 15%. Failure to file 941 is 5% per month. Misclassifying employees as contractors can trigger back-tax liability for years.
The fix isn't necessarily "don't do it yourself." It's: use software, follow the calendar religiously, and have a CPA do a quick review of the four 941s and the W-3 each year before they go out. That's a few hours of CPA time and it catches almost every error before it becomes a notice.
Reach out and we'll tell you whether your current setup is fine, needs a tune-up, or genuinely needs to move.