Payroll Software Compared for Small Businesses

Payroll software is one of the few tools a small employer genuinely cannot do without. The hard part is not finding a product; it is picking one that fits your country, your team and the way you already keep your books. This comparison covers the main options in the US and the UK and gives you a practical way to choose.

Two hands typing on a silver laptop that sits on a warm wooden desk — The right payroll tool turns a stressful monthly task into a short review and an approval click.

Key takeaways

Choose by country first. US tools handle federal and state tax filings; UK tools handle HMRC RTI submissions and pension auto-enrolment.
Decide whether you want full-service payroll (the provider files and pays taxes) or software you run yourself.
Integration with your accounting software usually saves more time than any single feature.
Prices and plans change often. Compare current plans directly and run a trial payroll before you commit.

Payroll mistakes are expensive and public: employees notice immediately, and tax authorities notice soon after. Good software calculates pay and deductions, produces payslips, sends the required reports and keeps the records. Some products go further and handle benefits, time tracking, onboarding and HR documents.

This article does not rank products or quote prices, because both change frequently and the best choice depends on your situation. Instead, it explains the main options, what to compare, and how to test a shortlist. Payroll and tax rules are covered here only in general terms; check IRS or GOV.UK guidance, or ask an accountant, for anything specific to your business.

Full-service payroll vs software you run yourself

Before comparing brands, decide how much you want to hand over.

Full-service payroll

The provider calculates, deposits and files payroll taxes for you
Fewer deadlines to track personally
Often includes year-end forms and new-hire reporting
Common in the US, where federal and state filings stack up

Software you run yourself

You press the buttons and submit the reports
Usually cheaper and gives you more control
Common in the UK, where RTI submissions come straight from the software
You still need to make the tax payments yourself

Neither approach removes your legal responsibility. Even with full service, you must fund the account on time, enter correct information and classify workers properly.

Payroll software for US small businesses

US payroll means federal income tax withholding, FICA, FUTA, state withholding and state unemployment, plus Forms 941, 940 and W-2. Most small businesses pick a full-service provider. Common options include:

Gusto: a cloud payroll service aimed at small businesses, combining payroll with onboarding and benefits features.
ADP: one of the largest payroll providers, with plans for very small businesses through to large employers.
Paychex: another long-established provider with small business plans and options to add HR services.
QuickBooks Payroll: a natural fit if you already use QuickBooks for accounting, since payroll entries can flow into your books.
OnPay: a cloud payroll service for small businesses, often considered by owners who want straightforward full-service payroll.
Rippling: payroll as part of a wider platform that can also cover HR and IT tasks such as device and app management.

Features, state coverage and plan contents differ, and they change. Confirm that any provider files in every state where you have employees, including remote staff in other states.

Payroll software for UK small businesses

UK payroll runs through Real Time Information. Your software must be HMRC-recognised so it can send a Full Payment Submission on or before each payday, plus Employer Payment Summaries when needed. You also need to handle workplace pension auto-enrolment and statutory payments. Common options include:

HMRC Basic PAYE Tools: free software from HMRC for employers with fewer than 10 employees. It covers core RTI reporting but is basic.
BrightPay: payroll software used by many small employers and accountants, with options to connect to pension providers.
Sage: a long-standing UK accounting and payroll brand with payroll products for small businesses.
Xero: cloud accounting software with built-in UK payroll, convenient if your books already live there.
IRIS: payroll software and services used by employers and payroll bureaus.
QuickBooks: offers UK payroll alongside its accounting software.

Under 10 Number of employees for which HMRC Basic PAYE Tools is available free to UK employers HMRC

Common mistake

Choosing payroll software purely on headline price. A low monthly fee looks good until you discover that pension uploads, extra states, year-end forms or employee self-service cost extra, or are missing. Compare the total for your actual team, including the features you will really use.

An open laptop on a clean white desk beside a coffee mug and a small green plant — Run a test payroll on your shortlist before you move real employees across.

What to compare: a side-by-side checklist

Use this table as a scorecard for each product on your shortlist. Fill it in from the provider's own current information and your trial.

Feature	Why it matters	Question to ask
Tax filing	Missed filings bring penalties	Does it file and pay taxes for me, or only calculate them?
Jurisdiction coverage	Each US state and the UK have their own rules	Does it cover every state or country where I employ people?
Accounting integration	Saves re-keying and reconciliation errors	Does it sync with my accounting software?
Pensions and benefits	UK auto-enrolment is a legal duty; US benefits add deductions	Does it connect to my pension or benefits provider?
Employee self-service	Reduces questions about payslips and forms	Can staff see payslips, P60s or W-2s online?
Time tracking	Hourly pay needs accurate hours	Can hours flow in from a timesheet or rota tool?
Statutory pay	Sick, maternity and paternity pay have rules	Does it calculate statutory payments correctly?
Support	Payroll problems are time-sensitive	Can I reach a person before payday if something breaks?
Data security	Payroll holds bank and ID details	Does it support multi-factor authentication and role-based access?

How to choose in five steps

List your requirements. Number of employees, pay frequency, hourly or salaried staff, states or countries, pensions, benefits and the accounting tool you use.
Ask your accountant. Many accountants work with one or two payroll systems every day. Using the same one makes year end and queries much easier.
Shortlist two or three products. Pick the ones that cover your country and integrate with your books.
Run a test payroll. Use free trials or demos to enter a sample employee and process a dummy pay run. Check the payslip, the tax figures and the reports.
Check the total cost and the exit. Compare current plans for your real headcount, and find out how easily you can export your data if you switch later.

Example

For example, imagine Hollin Studio, a made-up design studio in Leeds with four salaried staff, already using Xero for bookkeeping. The owner compares Xero's built-in payroll, BrightPay and HMRC Basic PAYE Tools. Basic PAYE Tools is free but would mean entering pension figures and journals by hand. The owner trials the other two, checks how each one handles the pension provider, and asks the studio's accountant which one they already support. The decision comes down to integration and support, not the headline fee.

Questions to ask in a demo or trial

Sales pages all promise easy payroll. A short demo or trial is your chance to see how a product behaves when things are not simple. Ask the provider, or test yourself:

How do I correct a mistake? See what happens when you need to fix a pay run after it has been submitted. In the UK that means a corrected FPS; in the US it may mean an adjusted deposit or an amended return.
What happens with a leaver? Process a dummy leaver and check the final payslip, holiday pay and the P45 or final pay records.
How are new tax rules applied? Ask how and when the product updates for a new tax year or a mid-year change, such as new minimum wage or sick pay rules.
Who can see what? Check you can give a bookkeeper limited access without sharing your own login, and that multi-factor authentication is available.
What reports do I get? Look for a clear payroll summary, tax liability reports and journals for your accountant.

Write the answers into your scorecard. A product that handles your awkward cases cleanly is usually the right one, even if another looks slicker on the first screen.

Switching payroll software mid-year

You can change provider during the tax year, but it takes care. Year-to-date figures for each employee must carry across exactly, or year-end forms will be wrong. In the US, quarterly filings and W-2s depend on accurate totals. In the UK, P60s and RTI submissions do.

Pro tip

If you can, switch at a natural break: the start of a new quarter in the US, or the start of the tax year on 6 April in the UK. Fewer year-to-date figures to transfer means fewer chances for errors. Keep the old system's reports and exports so you can answer questions later.

Payroll software selection checklist

Confirm the software is built for your country and every state where you employ
Decide between full-service and self-run payroll
Check integration with your accounting software
Confirm pension (UK) or benefits (US) connections
Run a test payroll with a sample employee
Compare current plans for your real headcount
Turn on multi-factor authentication and limit admin access
Agree a switch date and plan the data transfer

Frequently asked questions

Is free payroll software good enough?

In the UK, HMRC Basic PAYE Tools works for employers with fewer than 10 employees who are comfortable doing some tasks manually. As your team grows or your pay gets more complex, paid software usually saves time and reduces errors.

Do I still need an accountant if I use payroll software?

Software handles the routine runs. An accountant is still valuable for setup, worker classification, director pay, year end and any problem with the tax authority.

Can I use one payroll tool for staff in the US and the UK?

Most small business payroll products are built for one country. Employing in both usually means two systems or a specialist international provider. Ask each vendor directly.

Which payroll software is the best?

There is no single best product. The right choice covers your country and states, fits your accounting software, supports your pension or benefits setup and has support you can reach before payday.

The bottom line

Start with your country, then decide how much you want the provider to do. In the US, full-service options such as Gusto, ADP, Paychex, QuickBooks Payroll, OnPay and Rippling handle filings and deposits. In the UK, BrightPay, Sage, Xero, IRIS, QuickBooks and the free HMRC Basic PAYE Tools cover RTI reporting.

Shortlist two or three, run a test payroll, check how each connects to your books and pension or benefits provider, and compare current plans for your real headcount. The best payroll software is the one you can run accurately every payday without thinking twice.