Payroll for Contractors: How It Works

W-2 employees — You withhold federal and state income tax, Social Security, and Medicare from their pay. You also pay employer-side payroll taxes (e.g. FICA, unemployment). Employees are typically eligible for benefits (health, workers' comp, etc.) and you must follow wage and hour rules. Payroll software calculates withholdings, files employment tax returns, and makes tax deposits on your behalf.

1099 contractors — They are self-employed; you pay them a gross amount and do not withhold taxes. They are responsible for their own income and self-employment taxes. You generally do not pay employer payroll taxes on their compensation or provide benefits. At year-end you issue 1099-NEC forms for payments over the reporting threshold. Misclassifying employees as contractors can lead to penalties, so proper classification matters.

The IRS and state agencies use factors like control, permanence, and type of work to distinguish employees from contractors. Getting it wrong can mean back taxes, interest, and penalties. When in doubt, use payroll software that supports both worker types and consider consulting a tax or HR professional.

Contractor businesses often face:

• •Managing both W-2 and 1099 workers — Different pay cycles, tax rules, and reporting. You need a system that can run employee payroll and contractor payments without mixing them up.
• •Calculating payroll taxes — Withholdings, employer FICA, and state/local taxes must be correct each pay run. Errors can lead to penalties and employee disputes.
• •Filing quarterly payroll taxes — Federal and state returns and deposits have strict deadlines. Missing a filing or deposit can trigger fines.
• •Generating 1099 forms — Contractors who are paid $600 or more in a year must receive a 1099-NEC. You need to track payments and file with the IRS and state if required.
• •Tracking labor costs across jobs — For job-based businesses, tying labor (employees and subs) to projects helps with estimating and profitability. Some payroll tools integrate with job costing or accounting software.

Payroll software can:

• •Automate payroll calculations — Gross-to-net for employees, correct withholdings and employer taxes, so you don't have to do the math by hand.
• •Handle contractor payments — Run contractor pay runs, often with direct deposit or check, and track amounts for 1099 reporting.
• •File payroll taxes — Federal and state employment tax returns and deposits on the required schedule.
• •Provide payroll reports — Labor cost, tax summaries, and reports for accounting or job costing.
• •Integrate with accounting software — Sync to QuickBooks, Xero, or other tools so payroll flows into your books and, where supported, job costing.

Platforms like Gusto, OnPay, QuickBooks Payroll, and Rippling support both employee and contractor payroll, with varying depth of contractor features and integrations. Our reviews break down how each handles 1099 payments and reporting.

Some payroll tools are better suited for contractor-heavy businesses: they make it easy to run employee and contractor pay in one place, support 1099 payments and year-end forms, and often integrate with accounting or job-costing software. For curated picks, see our best payroll for contractors guide. For in-depth reviews, check out Gusto, OnPay, and QuickBooks Payroll.

Payroll tax filings for employees — If you have W-2 employees, you must withhold federal (and usually state) income tax, Social Security, and Medicare; pay employer FICA and often state unemployment tax; and file returns and make deposits on a set schedule (e.g. monthly or quarterly depending on size). Payroll software can calculate and file these for you.

Issuing 1099 forms for contractors — For each 1099 contractor you pay $600 or more in a calendar year, you must provide them with a 1099-NEC and file a copy with the IRS (and with the state if required). Deadlines are typically late January. Many payroll platforms track contractor payments and generate 1099s.

Quarterly filings — Employment tax returns (e.g. Form 941) are usually filed quarterly; deposit frequency can be monthly or semi-weekly depending on your liability. Missing a filing or deposit can result in penalties. Full-service payroll software files and deposits on your behalf so you stay in compliance.

Federal and state compliance — Rules vary by state (e.g. state income tax withholding, unemployment, local taxes). Payroll software keeps up with rates and forms so you don't have to track every jurisdiction manually. This is a high-level overview; consult a tax professional for your specific situation.

When evaluating payroll software for a contractor business, look for:

• •1099 contractor payments — Support for paying contractors, tracking amounts, and generating 1099-NEC forms. Contractor self-service is a plus.
• •Job costing or labor tracking — If you run jobs or projects, the ability to assign labor (employees and/or contractors) to jobs helps with profitability and estimating. Integration with QuickBooks or other accounting software often enables this.
• •Accounting integrations — Sync payroll data to your books so you don't re-enter data. QuickBooks Payroll is built for QuickBooks users; Gusto and OnPay integrate with QuickBooks and others.
• •Transparent pricing — Clear base and per-person (and per-contractor) fees so you can budget. Avoid surprises from hidden fees for 1099 filing or multi-state.
• •Ease of use for small teams — You may not have a dedicated HR or payroll person. Choose a platform that is straightforward to set up and run each pay period.

We publish head-to-head payroll comparisons so you can see how platforms stack up on features, pricing, and contractor support. Browse our payroll software comparisons to compare Gusto vs OnPay, Gusto vs QuickBooks Payroll, and more.