What to check before you trust a redundancy calculator

Online redundancy calculators are useful for planning, but they encode assumptions. Use this checklist before you resign yourself to a number — or before you accuse an employer of miscalculation.

1. Jurisdiction

GB, Northern Ireland, and Ireland are not interchangeable. Confirm which law applies to the employment contract and workplace.

2. Cap and rate date

Weekly caps change. The tool must use limits in force on your relevant date. Prefer tools that publish a “rates last verified” date and cite legislation or GOV.UK/MyWelfare.

3. Pay definition

Statutory weekly pay is a defined concept. Overtime, allowances, salary sacrifice, and irregular hours can complicate inputs. Mirror payroll’s statutory definition where possible.

4. Service history

Incomplete years, TUPE transfers, and career breaks can change eligibility and reckonable/continuous service. A calculator that only asks “years worked” may over-simplify.

5. Enhanced vs statutory

An employer policy may pay more than statute. A calculator showing only statutory pay is not “wrong” — it is answering a narrower question.

6. Official cross-check

Compare with GOV.UK or MyWelfare, then get the employer’s written worksheet. If numbers diverge, ask which inputs differ before escalating.

Try ours — carefully

Redundancy pay calculator. Then read the matching jurisdiction guide in our guides hub.

Official sources to keep open

Bookmark the primary official pages for your jurisdiction and re-check them whenever caps or bands change. Calculator sites (including this one) lag legislation if maintainers miss an update.

• GOV.UK — redundant employee rights
• GOV.UK — redundancy pay calculator
• Citizens Information — redundancy (Ireland)
• GOV.UK — Stamp Duty Land Tax
• Revenue.ie

Disclaimer

This article is general information for consumers in the UK and Ireland. It is not legal or tax advice and is not a substitute for advice on your facts. See our Disclaimer.

Red flags on calculator websites

No jurisdiction selector

A tool that never asks UK vs Ireland (or NI) is guessing.

No rates-verified date

Without a dated source, you cannot know whether April limit changes were applied.

Guaranteed outcomes

Marketing that promises a tribunal result from a web form is a hard stop — leave.

Data harvesting

Be cautious of tools that force account creation and extensive personal history before showing a basic statutory estimate.

Common mistakes

• Using today’s cap for a redundancy date in a previous limits year.
• Ignoring Northern Ireland or Ireland when the contract is not GB English/Welsh/Scottish.
• Treating a calculator output as a binding legal determination.
• Forgetting notice pay, holiday, and enhanced policy lines on the settlement statement.
• Entering net pay instead of the gross weekly figure the statute expects.
• Skipping the official GOV.UK or MyWelfare cross-check before challenging HR.

When to get personal advice

Seek tailored advice if you face discrimination issues, pregnancy or disability-related redundancy selection concerns, unpaid wages, insolvency, or pressure to sign a settlement agreement quickly. Free first-line help may be available from Citizens Advice (UK) or Citizens Information (Ireland); a solicitor or union can advise on your documents.

Keep copies of your contract, handbook redundancy policy, payslips covering the reference period, and every email about the consultation process. Those documents matter more than any blog article when numbers are disputed.