What payroll services, software, and tax services actually do
A payroll service is a company that handles your entire payroll process — calculating wages, withholding taxes, printing or depositing paychecks, and filing tax forms with federal and state agencies. You give them your employee hours or salary information, and they do the rest. You pay them a fee per paycheck or per employee.
Payroll software is a tool you run yourself (or your bookkeeper runs). You enter employee data, the software calculates taxes and deductions, and you authorize the deposits or check printing. You pay a monthly subscription, usually between $20 and $300 depending on the number of employees and features.
Payroll tax services are narrower: they file your quarterly and annual tax forms (941, 940, state returns) but don't necessarily handle the paycheck itself. Some businesses use software to run payroll, then hire a tax service to file the forms. Others use a full-service payroll company that includes tax filing.
The choice depends on how much time you have, how many employees you have, whether you want a person to call, and how much you want to spend. There is no single right answer — it depends on your operation.
Key Takeaways
- Full-service payroll companies cost more but handle everything and take legal responsibility for accuracy; software costs less but requires you or your bookkeeper to run it and stay current on tax rules.
- Payroll software works best for businesses with stable, salaried employees; full-service works better for hourly, variable, or multi-state payroll.
- Tax-only services are useful if you already have payroll running but need help with quarterly filings and year-end forms.
- Most payroll services integrate with accounting software, but integration quality varies — ask before you sign up.
- Switching providers mid-year is possible but requires careful handoff of tax records and W-2 information.
Full-service payroll companies: what you pay for
A full-service payroll provider (ADP, Paychex, Guidepoint, or local firms) takes the entire process off your plate. You tell them hours worked or salary, they calculate federal and state withholding, Social Security, Medicare, unemployment insurance, and any voluntary deductions. They deposit paychecks or print them, file quarterly 941 forms and annual 940 forms, and send W-2s to employees and the IRS.
Cost typically runs $25 to $75 per paycheck plus a setup fee, or a flat monthly fee of $200 to $500 depending on employee count and payroll frequency. If you have employees in multiple states, the cost rises because each state has different tax rules and filing requirements.
The main trade-off is that you lose direct control — you can't change a paycheck after it's processed, and you depend on the provider's timeline. But you also transfer legal liability. If the provider miscalculates taxes or misses a filing important date, they are responsible, not you. That protection matters if you are new to payroll or have complex situations like contractors, bonuses, or stock options.
Full-service providers also handle year-end reconciliation: if withholding was off, they catch it and adjust W-2s before sending them out. That's a real burden if you're doing it yourself.
Payroll software: lower cost, more hands-on
Payroll software (QuickBooks Payroll, Gusto, Rippling, Wave) lets you run payroll yourself or with your bookkeeper. You enter hours or salary, the software calculates taxes based on current federal and state rates, and you review and approve before the money moves. Most software can deposit paychecks directly to employee bank accounts or print checks you distribute.
Monthly cost ranges from $20 to $300 depending on the number of employees and whether you want add-ons like time tracking or benefits administration. Some charge per paycheck instead of per month. The software usually includes basic tax filing — quarterly 941s and annual 940s — but you may need to buy add-ons for state-specific forms or multi-state payroll.
The catch is that you (or your bookkeeper) are responsible for accuracy. If you enter the wrong hours, the software calculates based on what you entered. If you miss a tax rule change, the software won't catch it. You also have to stay on top of important date — the software reminds you, but it doesn't file automatically the way a service does.
Software works well if your payroll is straightforward: W-2 employees, consistent hours or salary, single state, no complex deductions. It breaks down if you have hourly employees with variable hours, contractors, bonuses, or employees in multiple states, because you have to understand the tax rules for each situation.
Tax-only services: when you already have payroll running
Some businesses run payroll themselves or use software, then hire a tax service to handle quarterly and annual filings. This makes sense if you're confident in your payroll calculation but want professional help with the forms — or if you're switching from one system to another and need a bridge.
A tax-only service typically charges $50 to $300 per quarter for 941 filings, plus $100 to $500 for year-end 940 and W-2 preparation. They pull your payroll data, verify it against your bank deposits, and file the forms on your behalf. Some also handle state unemployment insurance filings and wage-and-hour reporting.
The risk is that if your payroll data is wrong, the tax forms will be wrong too — the service is filing what you give them, not auditing your payroll. Make sure your payroll source (software or manual records) is accurate before you hand it off.
Comparing cost and time across the three routes
| Route | Monthly Cost Range | Time per Payroll Cycle | Who Handles Tax Filings | Best For |
|---|---|---|---|---|
| Full-service payroll | $200–$500 (or $25–$75 per check) | 5–10 minutes (you provide hours) | The provider | Hourly employees, multi-state, complex deductions, hands-off preference |
| Payroll software | $20–$300 | 30–60 minutes (you enter data, review, approve) | You or your bookkeeper | Salaried employees, single state, straightforward deductions, cost-conscious |
| Tax-only service | $50–$300 per quarter | Varies (depends on your payroll source) | The service (based on your data) | You already run payroll; you want professional tax filing |
Integration with accounting software matters more than you think
Most payroll services and software integrate with accounting platforms like QuickBooks, Xero, or FreshBooks. The integration means payroll data flows automatically into your accounting records — you don't have to enter it twice. But integration quality varies widely.
Some integrations are real-time and two-way: payroll updates your accounting software when ready, and you can see payroll expenses broken down by department or cost center. Others are one-way and delayed: payroll data lands in your accounting software once a day or once a week, and you can't sync changes back. A few integrations don't exist at all, and you have to export and import files manually.
Before you choose a payroll provider or software, check whether it integrates with your accounting system and how tight that integration is. If you're using QuickBooks, most major providers integrate well. If you're using something smaller or specialized, integration may be weak or nonexistent, and you'll spend time on manual entry.
How to decide: questions to ask yourself
How many employees do you have? Under 10, software often makes sense. Over 50, a full-service provider usually saves time and headaches. Between 10 and 50, either can work depending on payroll complexity.
Are your employees mostly salaried or hourly? Salaried employees with consistent deductions are easier to manage with software. Hourly employees with variable hours, overtime, and shift differentials are better handled by a service that knows the rules.
Do you have employees in multiple states? Each state has different tax rates, unemployment insurance rules, and filing requirements. A full-service provider handles this automatically. With software, you have to understand each state's rules or hire a tax service to file.
Do you have a bookkeeper or accountant? If yes, they may already use payroll software and can run it for you. If no, a full-service provider removes the burden from you.
How much time do you want to spend on payroll? Full-service: 5–10 minutes per payroll cycle. Software: 30–60 minutes. Tax-only: depends on your payroll source, but usually 30–60 minutes per quarter for filings.
Switching providers: what to watch for
You can switch payroll providers mid-year, but it requires careful handoff. Your old provider must send your new provider (or you) a summary of year-to-date payroll, taxes withheld, and deductions. Your new provider uses this to calculate the rest of the year's withholding correctly and to prepare accurate W-2s at year-end.
If the handoff is messy, you risk incorrect W-2s, which means employees file wrong tax returns and you file wrong 940 and 941 forms. The IRS catches this eventually, and you have to amend. It's fixable but painful.
Before you switch, ask your old provider for a year-to-date payroll summary in writing. Ask your new provider what format they need and whether they'll contact your old provider directly. Some providers will; others won't. If they won't, you have to be the middleman and make sure the data is complete and correct.
Frequently Asked Questions
Can I use payroll software if I have contractors?
Most payroll software handles W-2 employees only. Contractors are paid differently — no withholding, no payroll taxes, just a 1099 form at year-end. You can track contractor payments in accounting software, but you'll need a separate process or a service that handles both W-2 and 1099 payments. Some full-service payroll providers offer this; most software does not.
What happens if my payroll provider makes a mistake?
With a full-service provider, they are liable and will fix it and amend any tax forms. With software, you are liable — you entered the data or approved it. If you catch the mistake before year-end, you can correct it in the next paycheck. If you catch it after W-2s are sent, you'll need to issue corrected W-2s and amend tax forms, which is your responsibility.
Do I need payroll software if I only have one employee?
You could use software, but many solo business owners use a full-service provider or a tax accountant because the time savings are worth the cost. With one employee, payroll is straightforward enough that a service can handle it cheaply. Check local payroll services — many offer flat rates for small businesses.
Can I switch from software to a service mid-year?
Yes. You'll need to provide your new service with a year-to-date payroll summary from your software. Most payroll software can export this. Your new service will use it to calculate the rest of the year's withholding and prepare W-2s. Make sure the data is complete and accurate before you hand it off.
What's the difference between a payroll service and a PEO?
A Professional Employer Organization (PEO) is different from a payroll service. A PEO becomes the legal employer of your employees — they handle payroll, taxes, benefits, workers' compensation, and HR compliance. You pay a percentage of payroll, usually 2–8%. A payroll service just handles payroll and taxes; you remain the employer. PEOs are useful for small businesses that want comprehensive HR support but are more expensive and involve more legal complexity.