Thesaurus Payroll Review Ireland 2026 — Is It Right for Your Business?

Thesaurus Payroll is one of Ireland’s longest-established payroll software packages. Developed in Dublin by Thesaurus Software — the same company behind BrightPay — it has been used by Irish employers and accountancy practices for over 30 years. Despite BrightPay’s rise to prominence as the company’s flagship product, Thesaurus Payroll maintains a loyal user base and continues to be actively developed and updated for Irish payroll compliance.

This review covers what Thesaurus Payroll does, how it prices, and how it compares to BrightPay and the other Irish payroll options.

What Is Thesaurus Payroll?

Thesaurus Payroll is a desktop payroll application for Irish employers. It handles the full set of Irish payroll obligations: PAYE Modernisation real-time reporting to Revenue, PRSI calculations, USC deductions, and direct ROS submissions. Like BrightPay, it generates SEPA XML payment files for bulk employee payments through Irish banks.

It’s used directly by employers processing their own payroll and by accountancy practices running payroll on behalf of clients (the bureau version handles multiple employers in a single installation).

The product is updated each tax year to reflect any changes to Revenue requirements, rates, and legislation — including auto-enrolment for 2025.

Thesaurus Payroll Features

PAYE Modernisation

Thesaurus Payroll is fully PAYE Modernisation compliant. Each time you run payroll, it submits a Payroll Submission Request (PSR) to Revenue’s ROS system in real time. Employee tax credits and cut-off points pull automatically from Revenue (no more manual P2C entry), and the system flags any Revenue notifications that require your attention.

PRSI, USC, and Tax Calculations

All PRSI classes are handled correctly, including the employer PRSI differential at the lower rate (currently 8.8% up to €441/week, 11.05% above). USC is calculated at the correct rates for 2026. Income tax is calculated on a cumulative basis for each employee using their current tax credits from Revenue.

Auto-Enrolment

Thesaurus Payroll includes auto-enrolment support for the 2025 AERSS rollout. The software:

• Checks employee eligibility (age 23–60, earnings €20,000+)
• Calculates employee and employer contributions at the correct phase rate
• Generates the NTMA submission file for remitting contributions
• Tracks opt-out elections and re-enrolment dates

This is essential for any employer whose payroll software wasn’t updated for auto-enrolment — if you’re on an older version of any payroll package, check whether it’s been updated before your enrolment date.

SEPA XML Payments

Thesaurus generates SEPA XML payment files that you upload to your Irish bank’s online portal (AIB, Bank of Ireland, PTSB, Ulster Bank) to process employee payments in bulk. This eliminates manual bank transfers for payroll runs.

Payslips and Employee Documents

Thesaurus produces payslips for email or print, P60s at year end, and P45s for leavers. The bureau version produces all documentation across multiple employer accounts.

Reporting

Reports cover payroll summaries, PRSI liability, payroll journal entries (for importing into accounting software), and period comparisons. Reports export to PDF and CSV.

Thesaurus vs BrightPay — What’s the Difference?

This is the question most people ask. Both products are made by the same company, both are fully compliant with Irish payroll requirements, and both are updated for PAYE Modernisation and auto-enrolment. The meaningful differences are:

If you want cloud backup and employee self-service (employees accessing their own payslips and submitting leave requests), BrightPay Connect is a meaningful advantage. If you run payroll on a reliable PC, have no need for employee self-service, and want to keep costs down — Thesaurus is a perfectly capable choice.

Many accountancy practices continue to use Thesaurus specifically because they’ve used it for years, their workflows are built around it, and it does everything they need.

Thesaurus Payroll Pricing 2026

Thesaurus Payroll uses an annual licence model billed per tax year (January–December):

Prices are approximate — check directly with Thesaurus Software for current year pricing as rates may have changed.

The pricing is slightly below BrightPay at comparable tiers, reflecting the absence of the BrightPay Connect cloud layer.

Thesaurus vs Collsoft

Collsoft is the third main Irish desktop payroll product alongside Thesaurus and BrightPay. All three are fully compliant with Irish payroll requirements. Collsoft has a particularly strong following among smaller Irish employers and accountants. The differences between Thesaurus and Collsoft are largely a matter of interface preference and existing familiarity — both do the job correctly.

If you’re choosing from scratch, demo all three and see which interface your payroll person prefers. If you have an existing relationship with a software company or your accountant uses one product across all their clients, that relationship is worth preserving.

Who Is Thesaurus Payroll Best For?

Thesaurus Payroll is a strong fit for:

• Irish employers with 1–200 employees who want reliable, locally developed payroll software at a competitive price
• Accountancy practices using the bureau version to run payroll across multiple clients
• Businesses that don’t need employee self-service and are comfortable with a desktop application
• Existing Thesaurus users — if you’re already on Thesaurus, there’s no compelling reason to switch to BrightPay unless you specifically want Connect

It’s less suited to:

• Businesses that need cloud-based payroll with an employee app — BrightPay Connect or a fully cloud product like Paysuite may be better
• Businesses with international or complex payroll — all Irish desktop payroll products are optimised for standard Irish PAYE; complex equity compensation or multi-jurisdiction payroll may need specialist tools

Verdict

Thesaurus Payroll is a solid, reliable Irish payroll package that does everything most Irish employers need. It’s made by a trusted Irish company, updated every tax year for compliance, and priced competitively. The main reason to choose BrightPay over it is the Connect cloud layer — if you don’t need that, Thesaurus is a credible and cost-effective choice.

If you’re evaluating Irish payroll software from scratch, also compare BrightPay and Collsoft alongside Thesaurus — all three are worth a demo before deciding.

Frequently Asked Questions

Is Thesaurus Payroll PAYE Modernisation compliant? Yes. Thesaurus Payroll submits Payroll Submission Requests to Revenue’s ROS in real time as required under PAYE Modernisation.

Does Thesaurus Payroll support auto-enrolment? Yes. Thesaurus Payroll was updated for the 2025 auto-enrolment rollout, including eligibility checking, contribution calculations, and NTMA file generation.

What’s the difference between Thesaurus Payroll and BrightPay? Both are made by the same company (Thesaurus Software). BrightPay adds the Connect cloud layer with employee self-service and cloud backup. Thesaurus is desktop-only and slightly cheaper. Core payroll functionality is equivalent.

How much does Thesaurus Payroll cost? Annual licences start from approximately €199 for up to 10 employees. Bureau licences for accountancy practices start from approximately €429. See current pricing directly from Thesaurus Software.

Does Thesaurus Payroll generate SEPA payment files? Yes. Thesaurus generates SEPA XML files for bulk payroll payments through Irish banks.

Can Thesaurus Payroll be used by an accountancy practice? Yes. The bureau version of Thesaurus handles multiple employer payrolls within a single installation, with separate payroll records for each client.

Is there a free version of Thesaurus Payroll? Thesaurus Payroll is available free for a single employee — useful for sole directors paying themselves a salary. The standard annual licence applies for 2+ employees.