Best Payroll Software Small Business

Running payroll for a small UK business is not complicated in principle. Pay your people the right amount, submit RTI to HMRC, manage pension auto-enrolment. But the software choice matters more than it looks.

The wrong tool costs you time every pay run or money you did not budget for.

We reviewed six UK payroll platforms for businesses with 1 to 50 employees.

We assessed entry pricing against published and independently verified sources, checked HMRC recognition status, tested auto-enrolment workflows in documentation, and worked through the compliance edge cases that most buying guides skip: P11D handling, CIS compatibility, and what happens when the introductory discount expires.

There is no single best answer. A 3-person business and a 45-person business are using different tools for different reasons, and a platform that works well for a Sage accounting user is a poor fit for a business starting from scratch.

What follows is a shortlist with honest verdicts, not a ranked list that forces one winner on every situation.

Whichapp Software Made Our Small Business Shortlist?

We shortlisted six HMRC-recognised platforms that are actively marketed to UK SMBs. All prices exclude VAT.

We excluded providers that require a sales call before publishing any pricing (Pento is included because it appears regularly in SMB comparison searches, but we flag the pricing opacity as a hard limitation).

Sources: provider pricing pages, April 2026. Prices exclude VAT. Xero Payroll requires a Xero accounting subscription.

BrightPay desktop pricing applies to 2025/26 tax year; cloud pricing from 2026/27 requires the online calculator.

The most important split in this table is not between paid and free: it is between payroll-only tools and platforms that bundle HR.

Once you understand which side of that line you need to be on, the shortlist narrows quickly.

1. BrightPay Payroll: Best for Small Business Cost Efficiency

BrightPay is the HMRC-recognised payroll tool we recommend most often to UK small businesses, not because it has the most features, but because it has the best price-to-compliance ratio in the market at every employee count from 1 to 50.

For a business that needs reliable RTI submissions, pension auto-enrolment, and payslip generation without overpaying for features it will never use, BrightPay earns the top slot.

Why We Picked BrightPay for Small Businesses

The desktop pricing model is straightforward: £79/year for up to 3 employees, £139/year for up to 10, £209/year for up to 25, and £289/year for unlimited employees. At 25 employees, that is £17.42/month all-in.

Sage’s Essentials plan for the same headcount costs £50/month at full rate.

BrightPay’s auto-enrolment workflow connects to NEST, The People’s Pension, and most other qualifying pension providers without manual export steps.

The bureau licence is even if you are a single employer: it gives accountants and payroll bureaus access to unlimited employers and employees at a flat rate, a model Sage and Xero do not match.

If your accountant handles your payroll, they are probably already on BrightPay.

Best for: UK employers with 1 to 50 employees who want the lowest per-employee cost in the HMRC-recognised market, particularly those without existing accounting software relationships.

Where BrightPay Falls Short for Small Businesses

The desktop era is ending. From the 2026/27 tax year, BrightPay runs exclusively on cloud pricing, and that pricing is not published as a simple table. You must use the interactive calculator on the pricing page.

This matters for SMBs that want to benchmark costs quickly in a Finance conversation.

The cloud billing model charges based on your highest recorded employee count in the billing period, which means a short-term seasonal hire can push you into a higher billing tier for that month.

If your headcount fluctuates significantly across the year, model this carefully before committing.

P11D forms are not produced natively. You can export the data, but you need HMRC’s P11D Online or a third-party tool to file. If you run benefits in kind at scale, that adds a step that Payfit and Employment Hero handle in-platform.

See our full BrightPay review for the complete feature audit.

2. Employment Hero Payroll: Best Free Payroll for Small Businesses

Employment Hero Payroll is the only HMRC-recognised UK payroll platform that offers a genuinely free tier with no employee ceiling and no trial expiry. That is not a promotional claim; it is a structural product decision, and no direct competitor matches it.

For a business with tight cash flow that still needs compliant RTI submissions and pension auto-enrolment, the free tier is a serious answer.

Why We Picked Employment Hero Payroll for Small Businesses

The Free Payroll tier covers RTI submissions, pension auto-enrolment via PensionSync, P11D reporting, statutory pay calculations, and an employee self-service app. We verified these features against product documentation in April 2026.

The free tier is not a stripped-down shell: it handles the three compliance obligations every UK employer has, at zero cost.

If you later need HR features (leave management, onboarding, performance reviews), Employment Hero’s HR suite sits alongside the payroll module on the same platform.

That upgrade path is cleaner than migrating from BrightPay to a combined platform later.

Best for: Budget-constrained UK businesses that want compliant payroll at no cost and expect to need HR tools as the team grows. Particularly suited to cloud-native businesses comfortable with a SaaS-first interface.

See our full Employment Hero Payroll review.

Where Employment Hero Payroll Falls Short for Small Businesses

The free tier is real, but the overall pricing structure is opaque once you move beyond it. The Core Payroll paid tier requires a demo or direct quote.

That is a friction point for buyers who want to model costs before any sales engagement.

The platform was originally built by KeyPay (acquired in 2019 and rebranded post-2022), and some integrations still surface KeyPay API naming.

For a buyer checking integration documentation before sign-off, that legacy naming creates unnecessary confusion.

If you need the Construction Industry Scheme or complex shift-based pay structures, test these specifically before committing. User reviews on G2 and Capterra in 2025 flagged support response times as inconsistent at higher volume.

For a very small team, that matters less than it does at 50 employees.

3. Xero Payroll: Best for Existing Xero Accounting Users

Xero Payroll is not a standalone payroll product. It is a payroll module inside the Xero accounting platform, priced at £1.50 per person per month as an add-on.

If you are already running Xero accounting, adding payroll is a sensible and low-friction decision. If you are not already on Xero, the accounting subscription cost makes this hard to justify on payroll needs alone.

Why We Picked Xero Payroll for Existing Xero Users

The integration with Xero’s accounts is the core case: payroll journals post directly, bank reconciliation connects to salary payments, and you avoid the double-entry that separate payroll and accounting systems require.

For a small business owner who runs their own books, removing that reconciliation step saves genuine time each month.

The Xero Grow plan (£37/month) includes 1-person payroll and supports most core compliance requirements: RTI submissions, auto-enrolment, payslips, and statutory leave.

For a sole director running PAYE on themselves, the Grow plan is a credible all-in-one answer at a reasonable price point.

Best for: UK businesses already using Xero accounting that want payroll in the same platform without migrating to a separate tool. Not recommended as a first-choice payroll tool for businesses not already on Xero.

See our full Xero Payroll review.

Where Xero Payroll Falls Short for Small Businesses

The £1.50/person/month rate looks low, but it is additive. At 25 employees, you are paying £37.50/month for payroll on top of your Xero accounting subscription.

If you are on the Ignite plan (£16/month), that total approaches what a dedicated payroll tool would cost for full accounting functionality.

P11D forms are not natively produced in the standard plans. Advanced payroll features such as detailed labour cost reporting require higher Xero tiers.

For a business with a growing team and complex payroll structures, Xero Payroll’s feature depth becomes limiting before its price does.

4. Sage Business Cloud Payroll: Best for Sage Accounting Users

Sage Business Cloud Payroll is a credible SMB payroll tool, but we recommend it primarily to businesses already in the Sage accounting ecosystem.

The pricing structure has a specific risk that buyers need to model before signing up: the 90% introductory discount expires after six months, and documented renewal increases across Trustpilot and Capterra reviews between 2023 and 2025 show increases of up to 64.3% with no advance notice in multiple cases.

Why We Included Sage Business Cloud Payroll in This Shortlist

Sage is one of the most widely used payroll platforms in the UK SMB market.

• RTI submissions are automated
• auto-enrolment is built in
• and the three-tier structure (Essentials at £10/month + £2/employee
• Standard at £20/month + £4/employee
• Premium at £30/month + £6/employee) gives growing businesses a clear upgrade path

For a business already paying for Sage Accounting, adding Sage Payroll keeps the vendor relationship simple and the journal integration clean.

The brand recognition also matters in practice: your accountant, bookkeeper, or Finance hire is likely to be familiar with Sage, which reduces onboarding time.

Best for: UK employers with 5 to 100 employees already in the Sage accounting ecosystem. Particularly strong where the accountant operates in Sage and a shared data environment reduces manual reconciliation work.

See our full Sage Payroll review.

Where Sage Business Cloud Payroll Falls Short for Small Businesses

The 90% introductory discount compresses the pricing decision. On the Essentials plan at 25 employees, you pay approximately £5/month for the first six months, then £50/month from month seven.

If your finance team anchors the budget to the promotional rate, the step-up will be a problem.

P11D forms are not produced natively in any Sage Business Cloud Payroll tier. You need to use HMRC P11D Online or export data separately.

For businesses with benefits in kind, that is an additional compliance step that tools like Payfit eliminate.

The documented renewal price increases are a genuine procurement risk. Before signing up, request written confirmation of your renewal rate and build the full post-promotional rate into your Year 2 budget from the start.

Do not treat the six-month discounted figure as your working cost.

5. Payfit Payroll: Best Payroll and HR Bundle for Growing Teams

Payfit is not primarily a payroll tool. It is a combined payroll and HR platform that charges accordingly.

For a UK business of 10 to 100 employees that currently has no HRIS and is managing leave, onboarding, and documents on spreadsheets and email, Payfit collapses two separate system costs into one. That is a coherent value case.

For a business that only wants payroll, it is the wrong tool at the wrong price.

Why We Included Payfit in This Shortlist

Payfit handles RTI submissions, pension auto-enrolment, payslip generation, leave management, document e-signatures, and employee onboarding in a single interface.

For a People Ops manager at a 30-person company who is also managing HR manually, the bundling is the point: one system, one workflow, one set of compliance obligations tracked in one place.

P11D handling is available on Standard and Premium plans, which is a meaningful advantage over BrightPay and Xero Payroll for businesses running benefits in kind.

The interface is well regarded on usability reviews, and setup is reported as manageable without a dedicated payroll specialist.

Best for: UK businesses of 10 to 100 employees that need payroll and HR in one platform and do not have an existing HRIS. Not recommended for payroll-only buyers. See our full PayFit review.

Where Payfit Falls Short for Small Businesses

The cost at scale is difficult to justify for pure payroll. A 50-employee business on Payfit Premium pays roughly £469/month (£119 + (50 × £7)), over £5,600/year. BrightPay handles the same headcount for under £290/year.

If you do not use the HR features, you are paying a significant premium for functionality you are not using.

Payfit Light, at £29/month plus £5/employee, is more accessible at small headcounts, but the Light plan’s feature set is limited relative to what you might expect at that price point.

Standard and Premium unlock the features that make Payfit worth the premium, and at those tiers the cost rises fast.

• Businesses that already have a separate HRIS (BambooHR
• HiBob
• Personio) should evaluate carefully whether adding Payfit creates duplication rather than simplification

What Does Small Business Payroll Software Actually Cost in the UK?

The pricing variation in this category is wider than most buyers expect. At 10 employees, your annual payroll software cost ranges from £0 (Employment Hero free tier) to over £1,800 (Payfit Standard).

At 25 employees, that range extends from £0 to over £1,800/year on Payfit Light alone.

The price gap is not explained by compliance quality: every tool on this shortlist is HMRC-recognised and handles RTI and auto-enrolment.

It is explained almost entirely by whether the tool includes HR features and what the billing model rewards at higher employee counts.

Three pricing models appear across this shortlist:

• Annual flat fee by employee band (BrightPay desktop): Simple and predictable. Pay once per tax year. £79 to £289 covers 1 to unlimited employees.
• Monthly base plus per-employee (Sage, Payfit): Low headline, escalates with headcount. Always model the 25-employee and 50-employee cost before signing up.
• Free with paid upgrades (Employment Hero): Free payroll tier is real and complete. Cost appears when you add HR modules or move to Managed Payroll at £12/employee/month.

One finding that surprised us during this review: at 10 employees, the difference between paying for the wrong tool and the right one can exceed £1,000/year, with no difference in HMRC compliance coverage.

Pricing here is not a proxy for quality.

How Did We Evaluate Payroll Software for Small Businesses?

We assessed each platform across five dimensions relevant to UK small businesses with 1 to 50 employees:

1. HMRC compliance: RTI submission automation, auto-enrolment assessment and management, P11D handling, statutory pay calculations. Every shortlisted tool is HMRC-recognised; we checked what that covers in practice, in principle.
2. Cost at SMB scale: Entry price, per-employee escalation at 5, 10, 25, and 50 employees, and total annual cost including any mandatory add-ons. We verified pricing against published sources in April 2026 and flagged where pricing requires a sales call.
3. Setup complexity: Whether a non-payroll specialist can configure the tool without professional help. We used product documentation, onboarding guides, and user review data from G2 and Capterra.
4. Feature completeness at entry tier: What the entry plan actually includes. Some tools gate P11D, auto-enrolment configuration, or employee self-service behind higher tiers.
5. Switching risk: Data portability, export formats, and whether migrating away from the tool mid-tax-year is practical. We noted where accounting integration creates lock-in beyond the payroll data itself.

We excluded providers that are not HMRC-recognised.

We included Pento in the comparison table because it appears frequently in SMB payroll searches, but we excluded it from the top-pick analysis because the implementation fee and minimum viable scale make it commercially unsuitable for businesses with fewer than 50 employees.

Frequently Asked Questions About Payroll Software for UK Small Businesses

Methodology and Disclosure