Section 21 Replacement Notice: Generate a Compliant Section 8 Notice Online

If you searched for a “Section 21 replacement notice” and want to generate a Section 8 notice online, the first thing to understand is that the two are not interchangeable. Since the Renters’ Rights Act 2025 came into force on 1 May 2026, Section 21, the old “no-fault” notice, has been abolished in England. There is no like-for-like replacement that lets you end a tenancy without giving a reason. Instead, every landlord possession route now runs through Section 8 of the Housing Act 1988, which requires you to state a specific legal ground. The good news: you can still produce a valid, court-ready Section 8 notice yourself, online, on the correct prescribed form, and this guide shows you exactly how, where people go wrong, and how to build one that survives scrutiny in court.

Why there is no direct Section 21 replacement

Section 21 allowed landlords to recover possession of an assured shorthold tenancy (AST) without proving fault, simply by giving two months’ notice after any fixed term expired. It was fast, predictable and required no evidence of wrongdoing. The Renters’ Rights Act 2025 swept all of that away. From 1 May 2026:

• Section 21 is gone. No new Section 21 notices can be served, and a Section 21 notice purportedly served after that date is legally ineffective.
• Fixed-term ASTs no longer exist. Every assured tenancy is now periodic (rolling) by default. Tenants can leave on two months’ notice; landlords must use a ground-based route.
• Section 8 is the only landlord possession notice. You must rely on one or more of the statutory grounds and be able to evidence them.

So when people ask for a “Section 21 replacement,” the honest answer is that the replacement is a process, not a single magic form: identify a valid ground, serve a Section 8 notice on the prescribed form, then, if the tenant does not leave by the date the notice expires, apply to the county court for a possession order. The mindset shift matters. Section 21 was about timing; Section 8 is about proof. The most expensive mistakes happen when landlords treat the new notice as a drop-in replacement and skip the evidence-building that Section 8 demands.

For a fuller picture of what changed and why, see our explainer on Section 21 abolished: what landlords need to know in 2026 and the side-by-side comparison in Section 8 vs Section 21: what changed after the Renters’ Rights Act 2025.

What you need before you generate a Section 8 notice online

A notice that looks tidy but cites the wrong ground, miscalculates the notice period, or lacks supporting evidence is worthless in court, and a defective notice usually means starting the whole process again, months later. Before you generate anything, confirm the following.

1. A valid ground genuinely applies

Section 8 now has roughly 37 grounds following the Renters’ Rights Act reforms, split into mandatory and discretionary categories. Common landlord grounds include:

• Rent arrears (Ground 8, plus the discretionary Grounds 10 and 11).
• Anti-social behaviour or nuisance (Ground 14).
• Breach of a tenancy term other than rent (Ground 12).
• The landlord intends to sell the property (Ground 1A).
• The landlord or a close family member intends to move in (Ground 1).

The ground is not a label you pick to fit the outcome you want, it is a factual claim you must be ready to prove. Citing a ground you cannot evidence weakens the entire notice.

2. The correct notice period for your ground

Notice periods differ by ground and, for arrears grounds, by how often rent is paid. Some grounds now carry much longer periods than the old two-month Section 21 default, see the table below.

3. The current prescribed form

You must use the current prescribed Section 8 form on GOV.UK. Do not rely on a downloaded template carrying an old form number; the prescribed form is updated periodically, and serving an out-of-date version is one of the easiest ways to have a notice thrown out. Always start from the live GOV.UK page so you know you have the version in force on the day you serve.

4. Accurate details and evidence

You need the full legal names of all tenants, the property address, the tenancy start date, and, for arrears grounds, a precise rent statement showing the amount owed at the date of service. Sloppy or incomplete details are a gift to a tenant’s solicitor.

Section 8 grounds and notice periods at a glance

Note: the old Grounds 3, 4 and 16 were abolished by the Renters’ Rights Act 2025. Always check the current grounds and notice periods on GOV.UK and legislation.gov.uk before serving, because periods differ by ground and by rent frequency, and the figures above are a guide, not a substitute for the live rules on the day you serve.

Mandatory vs discretionary grounds

The distinction shapes your whole strategy:

• Mandatory grounds (e.g. Ground 8, Ground 1A): if you prove the ground at the hearing, the court must award possession. There is no discretion.
• Discretionary grounds (e.g. Grounds 10, 11, 12, 14): even if you prove the facts, the court will only grant possession if it considers it reasonable to do so in all the circumstances.

Many notices cite a mandatory ground plus one or two discretionary ones as backup, so that if the mandatory ground fails on a technicality (for example, the tenant brings arrears just below the threshold before the hearing), the discretionary grounds may still carry the claim. For a fuller breakdown, see how a Section 8 notice works and how landlords regain possession.

How to generate a compliant Section 8 notice online: step by step

You do not need a solicitor to produce the notice itself. Follow this sequence carefully.

1. Open the current prescribed form from GOV.UK. Confirm it is the version in force today. This single check prevents the most common cause of rejected notices.
2. Select your ground(s) and confirm the facts fit. Tick every ground you genuinely rely on. For each, ask: can I evidence this to a court? If not, leave it off.
3. State the grounds and the reasons in full. The form requires a clear written explanation for each ground. Vague wording (“the tenant has not paid”) is not enough, be specific about dates, amounts and conduct.
4. Attach a rent arrears schedule for arrears grounds. Show each rent due date, the amount due, the amount paid, the date paid and the running balance, ending with the total owed at the date of service.
5. Calculate the earliest possession date using the longest applicable period. If you cite grounds with different notice periods, use the longest one, counted from the date the notice is served (not the date you wrote it), and build in extra days for your chosen service method.
6. Serve it properly and keep proof. Follow the service rules in the tenancy agreement and the Housing Act. Record the date and method, hand delivery (with a witness or photo), first-class post (allowing deemed-service days), or any method permitted by the agreement.
7. Diarise the expiry date. You may only apply to court after the notice period ends and the tenant has not left. Many notices also carry a “use-by” longstop (often 12 months) after which they lapse, diarise that too.

The most frequent mistakes, wrong form version, miscalculated dates, vague grounds, and no evidence of service, are exactly the things a guided online tool is built to prevent. See Section 8 notice template for England: get it right the first time for the specific wording errors that most often void a notice, and our review of the best Section 8 notice software for England landlords for what a good guided builder should do for you.

Worked example: building a Ground 8 notice

Let me walk through a realistic scenario so the dates and arithmetic are concrete.

The situation. Priya lets a flat in Leeds to a single tenant, Daniel, on an assured periodic tenancy. Rent is £1,000 per calendar month, due on the 1st. Daniel has paid nothing since 1 March 2026. By 1 June 2026, three full months’ rent, £3,000, is unpaid.

Step 1, confirm the ground. Ground 8 (mandatory) requires at least three months’ rent unpaid where rent is paid monthly. At £3,000 owed across March, April and May, Daniel is at the threshold. Priya also adds Grounds 10 and 11 (discretionary, some arrears and persistent late payment) as backup, in case Daniel makes a part-payment before the hearing that dips him just under the Ground 8 threshold.

Step 2, build the rent statement.

Step 3, pick the notice period. For a monthly tenancy, Ground 8 carries a 4-week minimum notice period. Grounds 10 and 11 are also 4 weeks, so the longest applicable period is 4 weeks.

Step 4, calculate the earliest possession date. Priya serves the notice by hand on 2 June 2026 and keeps a dated photo and a witness note. Four weeks from service takes her to 30 June 2026, so she states the possession date as on or after 30 June 2026 (and, to be safe against any service-day argument, she would not apply to court until clearly after that date).

Step 5, diarise. Priya diarises 30 June 2026 as the earliest court-application date, and notes the notice’s longstop expiry so she does not let it go stale.

The lesson. None of this is complicated, but every figure has to be right. A transposed date, an arrears total that does not reconcile with the rent statement, or a notice period taken from an out-of-date guide can each be enough to send Priya back to square one, months later, with three more months of arrears mounting.

What it costs if the tenant does not leave

The notice itself is free to produce. But if the tenant stays past the expiry date, you must apply to the county court for a possession order, which carries a court issue fee, and, if you ultimately need enforcement, bailiff or High Court enforcement costs on top. Budget for this from the outset rather than treating the notice as the finish line. Our breakdown of Section 8 court costs and fees in 2026 sets out the typical figures and where they bite.

It is also worth weighing whether a contested possession claim is the right route at all. Where a tenant is willing to leave, a negotiated end can be faster and cheaper, see surrender vs Section 8 eviction: which route should you use?.

How a guided online builder reduces the risk

Generating a Section 8 notice online is not about producing a prettier PDF, it is about removing the failure points that DIY notices keep hitting. A well-designed builder should:

• Pull the current prescribed form structure, so you are never working from a stale template.
• Map your situation to the right grounds and warn you if a ground you have selected lacks the evidence the court will expect.
• Calculate the notice period and earliest possession date automatically from the service date and rent frequency, using the longest applicable period.
• Generate a reconciled rent arrears schedule for arrears grounds, so the figures on the schedule match the figures in the notice.
• Prompt you to record the service method and date, and keep an audit trail you can show the court.

In other words, it bakes the checklist above into the workflow so the easy-to-miss errors simply cannot happen. For a wider view of how tooling is replacing the old Section 21 routine, see Section 8 eviction software for landlords: replacing the Section 21 workflow.

Frequently asked questions

Can I still use a Section 21 template I already paid for?

No. Any Section 21 notice served after 1 May 2026 is legally ineffective in England, no matter how recently you bought the template. There is no transitional window that lets you reuse it. Read Section 21 abolished: what landlords need to know in 2026 for the full position, and is Section 21 still valid in 2026? for the common myths.

Is generating a Section 8 notice online legally valid?

Yes, provided the notice is on the current prescribed form, states valid grounds with proper reasons, gives the correct notice period, and is served correctly with proof. The medium (online builder, word processor, or pen and paper) does not affect validity; the content and service do. An online builder simply makes it far harder to get those things wrong.

Which ground should I use to replace a no-fault eviction?

There is no true no-fault replacement. If your honest reason is that you want to sell, that is Ground 1A (4 months’ notice). If you or close family want to move in, that is Ground 1 (4 months’ notice). You cannot use these grounds as a pretext for an unrelated reason, the court will expect the intention to be genuine.

How much rent arrears do I need for Ground 8?

For a monthly tenancy, at least three months’ rent must be unpaid at the date of service and remain unpaid at the hearing; for weekly tenancies the threshold is 13 weeks. If the tenant pays the balance down below the threshold before the hearing, the mandatory Ground 8 can fail, which is why many landlords add the discretionary arrears grounds (10 and 11) as a fallback.

Do I need a solicitor?

Not to draft and serve the notice itself. You may want legal advice if the tenant defends a discretionary-ground claim, raises a counterclaim (for example about disrepair), or if the facts are unusual. This article is general information, not advice on your specific case.

What happens after the notice expires?

If the tenant has not left, you apply to the county court for a possession order. You cannot simply change the locks or remove the tenant yourself, doing so is an unlawful eviction and a criminal offence. The notice is the first step in a legal process, not a self-help remedy.

Coming soon

Tenancy Pilot is launching soon and will include a guided Section 8 notice generator that walks you through choosing the right grounds, calculating the correct notice period, building a reconciled rent arrears schedule, and producing the notice on the current prescribed form, so you can generate a compliant Section 8 notice online in minutes rather than risking a costly error on an outdated template. Deadline alerts in the dashboard will then track your notice expiry and court-application dates for you. It is not available yet, but you can be first in line.

Join the waitlist to get early access to the Section 8 notice builder the moment we launch.

This guide is general information for England landlords and is not legal advice. The law and prescribed forms change, always check the current guidance on GOV.UK and legislation.gov.uk, and consult a qualified solicitor about your specific circumstances.