UK Redundancy Notice Period Calculator: Statutory Notice Pay For Employers

Redundancy is one of those “we didn’t plan for this” moments in a small business.

You might be restructuring, losing a major client, or needing to reduce overheads fast. But even when redundancy is the right commercial decision, the legal admin can feel heavy - especially around notice periods and notice pay.

That’s where using a redundancy notice period calculator can help. Once you know the employee’s length of service and what their contract says, you can usually work out the minimum notice you must give - and what you’ll likely need to pay.

In this guide, we’ll walk you through how a redundancy notice calculator works in practice, how statutory notice pay is worked out, and the common traps employers fall into (so you can avoid expensive disputes later).

What Notice Period Applies In Redundancy?

When you’re making redundancies, the first thing to pin down is: what notice period applies?

For most employers, the answer is:

• the contractual notice period (what the employment contract says), as long as it meets at least the legal minimum; or
• statutory minimum notice (the legal floor), if the contract is silent or gives less than the statutory minimum.

In other words, you’re generally looking at the greater of contractual notice and statutory notice.

Statutory Minimum Notice: The Quick Rules

Statutory minimum notice (in the UK) is based on continuous service:

• Less than 1 month: no statutory notice entitlement
• 1 month to less than 2 years: 1 week’s notice
• 2 years to 12 years: 1 week per complete year of service (so 2 years = 2 weeks, 7 years = 7 weeks)
• 12+ years: 12 weeks (maximum statutory notice)

If you want a deeper breakdown (including how notice interacts with redundancy procedure), redundancy notice periods are worth getting clear early, because timing errors are a very common source of disputes.

Contractual Notice: Check The Paperwork Before You Do Anything Else

Many small businesses have an employment contract that sets a longer notice period than statutory minimum (for example, “1 month’s notice” after probation).

That usually means your redundancy notice period calculations must start with the contract, not the statutory rules.

If your contracts are inconsistent, outdated, or unclear, it’s a good time to tighten them up before a restructure becomes a recurring headache. Having a properly drafted Employment Contract in place can prevent “we thought it meant X” arguments later on.

Does Being On Probation Change Notice Entitlement?

Probation can change contractual notice (if your contract says so), but it doesn’t remove statutory minimum notice once the employee has at least one month’s service.

So even during probation, if someone has been employed for over a month, you still need to check statutory notice rules.

How To Use A Redundancy Notice Period Calculator (Step-By-Step)

A redundancy notice calculator isn’t complicated - but it does depend on getting the facts right.

Here’s a simple way to run it in your business.

Step 1: Confirm The Employee’s Continuous Service Date

Start with the employee’s start date and confirm if there are any breaks that might affect “continuous service”. For most employees, it’s straightforward - but if you’ve had casual patterns, unpaid leave, or changes in employment arrangements, this can get messy.

If you’re unsure, it’s worth getting advice early, because continuous service often affects more than notice (for example, redundancy pay and unfair dismissal eligibility).

Step 2: Identify The Contractual Notice Period

Check:

• the main employment contract
• any written variation letters
• any promotion letters with revised notice terms
• any staff handbook terms that are expressly contractual

If the contract says “4 weeks’ notice”, and statutory is only “2 weeks”, the notice period is usually 4 weeks.

Step 3: Calculate Statutory Minimum Notice

Apply the statutory rules based on completed years of service (capped at 12 weeks).

Example: If an employee has 6 complete years of service, statutory notice is 6 weeks.

Step 4: Use The Higher Number (Contract vs Statutory)

Once you have both figures, select the higher notice period. That’s the baseline your business should plan around.

Step 5: Decide How Notice Will Be Given (Work It, Pay It, Or A Mix)

This is where your UK notice pay calculations need to go beyond weeks and into payment method.

Common approaches include:

• Working notice (they work through the notice period and are paid as normal)
• PILON (pay in lieu of notice - you terminate immediately and pay what they would have earned during notice)
• Garden leave (they remain employed and paid, but you require them not to attend work - only if the contract allows it)

Be careful here: PILON and garden leave should ideally be backed by clear contract wording and handled consistently, or you can accidentally create breach of contract risk.

How Statutory Notice Pay Works (And What You Must Pay)

Once you’ve worked out the notice period length, the next question is: what does notice pay actually include?

This is the part many employers underestimate - particularly where pay isn’t a simple fixed salary.

At a high level, statutory notice pay is designed to reflect what the employee would have earned if they worked their notice.

However, there’s an important practical point: if the employee’s contractual notice is longer than the statutory minimum, the statutory “normal pay” protections can apply to the statutory minimum part of the notice period, while the additional contractual notice is generally paid based on the contract terms (and what you agree/pay under working notice, PILON, or garden leave). This is one reason notice pay often needs a contract-by-contract check.

For a more detailed legal overview, this guide on statutory notice pay is a helpful reference point when you’re stress-testing what you’re planning to pay.

What Counts As “Pay” During Notice?

It often includes:

• basic salary / wages
• regular overtime (depending on how it’s structured and how regular it is)
• commission (especially if it’s contractual and normally earned during work)
• certain allowances (where they’re paid routinely and are part of normal remuneration)

It may also involve:

• the value of benefits (for example, car allowance/private health cover) depending on what the contract provides, how any PILON clause is drafted, and whether you’re compensating for benefits that would have continued during notice
• bonus entitlements (if they are contractual and would have accrued or been earned during notice under the scheme rules)

This is why a one-size-fits-all statutory notice pay calculator can be risky for small businesses. The legal answer can depend on the contract wording, the employee’s normal working patterns, and whether you’re paying statutory notice only or a longer contractual notice period as well.

Notice Pay vs Redundancy Pay: Don’t Mix Them Up

Notice pay and redundancy pay are different concepts:

• Notice pay covers the notice period (working notice or PILON).
• Statutory redundancy pay (if eligible) is a separate entitlement based on age, length of service, and weekly pay (subject to the statutory cap).

In practice, you may need to pay both. Your redundancy budget should include:

• notice pay (or salary during notice)
• redundancy pay (if applicable)
• accrued but unused holiday pay
• any other contractual sums owed (expenses, commission already earned, etc.)

What About Holiday During Notice?

Holiday often becomes a “hidden cost” in redundancy projects.

Key points to keep in mind:

• If the employee has accrued holiday they haven’t taken by termination, you generally need to pay it out.
• An employee can often take holiday during notice (subject to notice requirements and employer approval/refusal rules).
• You can also sometimes require employees to take holiday during notice, but you need to follow the correct notice rules.

If you’re running a restructure and trying to predict the cost per employee, your internal UK notice pay calculations should include holiday accrual, not just weeks of notice.

Common Employer Mistakes With Notice Pay (And How To Avoid Them)

Even well-meaning employers get caught out here - especially when you’re moving quickly and juggling cashflow.

These are some of the most common pitfalls we see in small businesses.

1) Paying Basic Salary Only (When Pay Isn’t Just Basic Salary)

If an employee usually earns commission or regular overtime, paying only their base salary during notice (particularly under PILON) can lead to underpayment claims.

Tip: Before you finalise figures, check the employee’s last 12–13 weeks of earnings pattern and cross-check against the contract and any commission/bonus/overtime terms.

2) Miscalculating The Start Of Notice

Notice typically starts when notice is given (and properly communicated), not when you “decide internally” that someone will be redundant.

If you’re issuing letters, make sure you do it properly and keep clear records.

When you’re documenting the termination, it can help to follow a clear written format. Many employers use a structured termination letter approach so the notice date, final pay, and termination date are all clearly set out.

3) Using PILON Without A PILON Clause

If you terminate immediately and pay in lieu, but the contract doesn’t allow PILON, you may be exposing the business to a breach of contract argument (even if you paid what you think is the right amount).

Tip: Check the contract wording before you choose PILON. If the contract is silent, take advice before proceeding.

4) Forgetting Tax And Payroll Treatment

Notice pay is usually treated as earnings and processed through payroll (subject to income tax and National Insurance).

Some termination sums can be treated differently (depending on what they relate to), so make sure payroll and HR are aligned before you commit to figures in writing. (This is general information only and isn’t tax advice - your accountant or payroll provider can confirm the right treatment for your situation.)

5) Rushing The Process And Skipping Consultation

This article is focused on notice periods and notice pay - but redundancy risk is rarely limited to the maths.

If you don’t run a fair process (including consultation), you can face claims that cost far more than the notice pay itself.

If you’re planning redundancies and want support getting the steps right, redundancy advice can help you manage the legal risk while keeping the process practical and human.

How To Manage Redundancy Notice In A Small Business (Practical Steps)

In a small business, redundancy isn’t just a legal event - it affects morale, productivity, and often your reputation in a tight local market.

So it helps to plan notice and notice pay as part of a bigger redundancy workflow.

Set A Clear Timeline Before You Announce Anything

Before communicating to staff, map out:

• proposed consultation dates
• decision dates
• expected notice start date
• termination date
• final payroll cut-off dates

This reduces the risk of giving inconsistent information (which can undermine trust and increase the risk of disputes).

Put The Numbers In Writing (And Make Them Easy To Follow)

Your redundancy paperwork should clearly show:

• the notice period applied (contractual or statutory)
• the notice start date and end date
• whether it’s working notice, PILON, or garden leave
• what will be paid (notice pay, holiday pay, redundancy pay if applicable)
• any deductions (for example, overpaid holiday, where lawfully allowed)

Small businesses often get into trouble when they “roughly explain it” in a meeting but don’t document it properly afterwards.

Be Consistent Across Employees (Where Possible)

If multiple roles are affected, consistency matters. If one employee is allowed to work out notice but another is forced into PILON without explanation, you can trigger grievances and allegations of unfair treatment.

Sometimes differences are justified - but you should be able to explain them clearly and link them back to contract terms or genuine business reasons.

Check For Connected Risks (Performance, Conduct, Sickness)

Redundancy decisions can get legally complicated if they overlap with:

• ongoing performance management
• active grievances
• long-term sickness absence
• recent protected disclosures (whistleblowing)

That doesn’t mean you can’t proceed, but it does mean you should take advice before finalising notice, termination dates, and communications.

Key Takeaways

• A redundancy notice period calculator approach starts with two numbers: the employee’s contractual notice and the statutory minimum notice - and you normally apply the higher of the two.
• Statutory notice is based on length of service (1 week after 1 month’s service; then 1 week per year from 2–12 years, capped at 12 weeks).
• Statutory notice pay is meant to reflect what the employee would normally earn during the statutory notice period, which can include items beyond base salary (for example, regular overtime/commission/allowances, depending on the facts and contract).
• If contractual notice is longer than statutory, the statutory “normal pay” rules may apply to the statutory minimum part of the notice period, while the remainder is generally governed by the contract/PILON terms.
• Notice pay is separate from redundancy pay (and your redundancy budget should usually include notice pay, redundancy pay if eligible, and accrued holiday pay).
• Be careful when using PILON or garden leave - ideally your contract should allow it, and you should document the figures and dates clearly.
• Timing and communication matter: miscalculating when notice starts or failing to confirm terms in writing can quickly create disputes.

If you’d like help working through redundancy notice periods, statutory notice pay, and the right paperwork for your situation, you can reach us at 08081347754 or team@sprintlaw.co.uk for a free, no-obligations chat.