Do I need to give two or four weeks’ notice to leave my job?

Do I need to give two or four weeks’ notice to leave my job?

Four… three… two… one might sound like a countdown, and if it’s the countdown to your last day in a job, it’s not always as straightforward.

When you hand in your notice, the amount of time you actually have to work before leaving can vary a lot, sometimes it’s weeks, sometimes it’s months.

You might Google it, check your contract, or ask your manager, and end up with a different answer every time.

Many people believe you must give two or four weeks’ notice to leave a job.

So deciding to leave and move on may actually be the easy part, but you will need clarity on exactly when you can do so.

Here we take a look at how much notice you actually need to give, what the law says, what your contract says, and whether the Employment Rights Act 2025 (ERA) changes anything at all. It doesn’t by the way. But we’ll get to that.

Why your notice period is important

If you want to leave your job for any reason you’ll normally need to give your employer some warning. This is called your notice period (1) [cited 6.5.26]

Notice periods protect both sides. They give your employer the crucial time it needs to plan for your departure, and they give you the space to finish what you need to do, tie up loose ends, and hand things over properly if needed.

Just as importantly, they also protect you, because if you give the correct notice and follow the rules, you avoid:

• Losing pay.

• Being accused of breach of contract.
• Damaging your reference.
• being refused other entitlements.

So it’s worth getting it right.

The law and notice periods

There is a legal minimum which is set out in the Employment Rights Act 1996 (2) [cited6.5.26].

So if you reach the point where there’s no turning back and you’re definitely going to quit your role, the legal minimum notice you must give is:

• One week if you’ve worked for your employer for one month or more.

• No legal minimum if you’ve worked there for less than one month.

So if you’ve heard anything different, ignore it. The law doesn’t say two weeks. It doesn’t say four. It simply says one week.

As with most things, there’s a “but”.  Your contract of employment can require more and if it does, that’s what you have to follow (3) [cited 6.5.26].

Your contract and notice period

While the law sets the minimum notice period required, the fact is that the notice period for most employee’s is set by their employment contract.

Common contractual notice periods include:

• 1 week.
• 2 weeks.
• 4 weeks.
• 1 month.
• 6 weeks.
• 3 months (typical in senior roles).

You must pay attention to what is stated in the contract. If it says you must give four weeks’ notice, then you must give four weeks.

What if I have not got a contract or if it says nothing?

Then the legal minimum applies: one week.

Two weeks vs four weeks.

There can be some confusion about the required notice period. Many people will tell you it’s four weeks, while others assume two weeks is the standard because it’s common in the US. But in the UK, there is no “two‑week rule.”

Here’s how it usually breaks down:

Two weeks’ notice

You only give this if:

• Your contract says two weeks.
• Your employer has a policy that applies to your role.
• You’ve agreed it informally and both sides are happy.

Four weeks’ notice

You give this if:

• Your contract says four weeks.
• Your contract says “one month”.
• You’re in a role where longer notice is standard (e.g., management, specialist roles).

Does ERA 2025 change notice periods?

Short answer: No. Not at all.

The ERA introduces a wide range of changes around worker rights, enforcement and modernising employment protections, but notably it does not change notice periods (4) [cited 6.5.26  h

Notice periods are still determined by:

• Employment Rights Act 1996 (legal minimums).
• Your employment contract (contractual notice).

ERA doesn’t change any of this. It doesn’t increase notice. It doesn’t reduce it. It doesn’t create new rules for resignations.

Will I always be forced to work my notice?

This is where things can get messy. You may have heard of employees resigning with immediate effect, which means they leave their job straight away without working any notice at all (6) [cited 6.5.26  

Workers will sometimes do this because they feel the situation has become unbearable and they cannot work another day.

Although your employer cannot physically force you to work your notice period, it is a legal clause in your contract, and refusing to work it means you are breaching that contract.

This kind of breach could, in theory, lead to consequences if your employer chose to pursue the matter, which is possible but extremely rare.

If you leave early without agreement, your employer could:

• Mark you as having breached your contract
• Refuse to pay you for the period you didn’t work
• Deduct pay for unworked notice (if the contract allows it)
• Refuse to give you a good reference
• Pursue damages (rare, but possible in senior roles)

But can your employer waive your notice?

Yes. And many actually do.

An employer can waive your notice period but still pay you. It is known as Payment in Lieu of Notice (PILON) and can happen when the contract allows it, or by mutual agreement, and it will often lead to you leaving immediately and still being paid (7) [cited 6.5.26] 

It typically happens in situations such as redundancy or as part of an agreement to resolve a work‑related dispute or falling out.

You can also ask to be allowed to leave early which many employers do agree to, especially if you’re not in a business‑critical role. Or if you are moving to a new job, you can negotiate.

Can you use annual leave during the notice period?

Yes, you can take annual leave during your notice period, provided you have accrued the leave and get approval from your employer (8) [cited 6.5.26] 

Employers can refuse leave requests based on business needs, but they cannot stop you from being paid for unused statutory holiday (up to 28 days) when you leave.

Can I be disciplined and sacked during my notice period?

Yes, even though you are leaving you can still face disciplinary action and be dismissed during your notice period.

It is because while you are actually working your notice, you remain an employee with the same rights and obligations, meaning you can be dismissed for gross misconduct (immediately) or following a fair disciplinary process.

If fired for gross misconduct, you could lose your right to notice pay

How to check your notice period quickly

Start by looking at your employment contract, then check your original offer letter, the staff handbook, your probation clause, and any updated terms you’ve signed since joining. If you’re still unsure after that, ask HR to confirm it in writing. And if there’s any conflict between documents, the most recent written term usually applies.

FAQs

Do I have to work my full notice?

Not if your employer agrees to let you leave early.

Can my employer force me to work notice?

It can unless it agrees otherwise, or you opt to resign with immediate effect.

Can I leave without notice?

You can, but be warned it’s a breach of contract unless your employer agrees.

Does ERA 2025 change notice periods?

No. Notice periods remain exactly the same.

What if my contract says one thing and HR says another?

Your contract wins.

What if I’m paid weekly?

Your notice period is still whatever your contract says.

Finally

The two most important things when it comes to notice periods is what your contract says and if it does not say anything, the legal minimum is one week. The ERA doesn’t change any of this.

If you want to leave on good terms, protect your reference, and avoid any last‑minute drama, the best approach is simple. Check your contract, talk to your employer and agree a plan and get it in writing