One wrong date voids the notice
Rent increases fail on the details, not the decision.
Enter a tenancy and Noticr applies the Section 13 timing rules — the 52-week interval, the two-month notice period, effective-date alignment — then drafts Form 4A. Free, no signup.
Open the full calculatorSection 13 · Validity check
MONTHLY · EnglandClears the timing rules
Served today, the interval and 2-month notice rules are met, so the increase is timed to take effect on 01 Oct 2026. Timing is only one of the ways a notice can be void — check the points below.
This checks timing only — before serving, also confirm
- Effective-date alignment — The date must land on the first day of a rent period. The date above is aligned for you — a hand-typed date may not be.
- The current Form 4A — The increase must be served on the current prescribed form. An out-of-date form is void.
- Figures stated correctly — The current and proposed rent must be entered accurately and unambiguously on the form.
- Valid service — The notice must be served by a valid method, with proof, allowing for deemed-service timing.
- Earliest effective date
- 01 Oct 2026
- Increase
- £1,495.00+6.8%
- Interval
- 52 weeks
How it works
Three steps. No ambiguity.
Each step is checked against the statute and logged to your audit trail. The arithmetic, the form, and the record — built so they survive a Tribunal review.
The calculator does the arithmetic.
Input your tenancy details. We apply the Section 13(2) eligibility check, the 52/53-week interval, and align the effective date to your rent period.
Form 4A generated instantly. No manual filling.
Every field on the draft Form 4A is populated from your inputs — no re-typing, no misalignment. Hash-stamped for the audit trail.
Form 4A
Landlord's notice proposing
a new rent
Every tenancy tracked. Every notice recorded.
The dashboard tells you which tenancies need attention this month and keeps an immutable trail of every calculation, generation, and service event — retained for six years.
The whole flow, in 80 seconds.
No slides — the real product. A tenancy goes in; a statute-checked, Tribunal-ready Form 4A comes out.
For letting agents
You do this at volume. And you carry the liability.
A landlord serves a Section 13 notice once a year. An agency serves them across a whole book — and is on the hook when one is wrong. Noticr Agency is the bolt-on your CRM does badly: one agency plan, bulk Form 4A, and a tribunal-ready trail per client.
Agency plan from £349/month · Billed monthly · No contract
The liability lands on you.
Botch a notice and it's the agent — not the landlord — who carries the professional-negligence exposure. One void notice can cost a client a year's increase.
Who pays for a mistakeEvery tenancy, every review date.
Run a whole portfolio in one pass. Flag every tenancy due for a Section 13 review, generate Form 4A in batch, and never miss a 52-week window.
See bulk generationA record that survives challenge.
Every calculation, generation, and service event timestamped for six years and exportable per tenancy — the evidence trail when a tenant goes to tribunal.
See the audit trail
Free guides
Everything you need to know about Section 13.
Plain-English explainers written around the statute, not around it. Updated for the Renters' Rights Act 2025.
Get started today
Get ready before the next rent review.
Every rent increase you manage manually is one miscalculation away from a tribunal challenge. Noticr helps you get the dates right — with an audit trail from day one.
Built for letting agents and portfolio landlords · England only · Audit-ready