Get every Section 13 rent increase right, the first time.
Rentfort tracks the 12-month and 2-month rules for every tenancy, so you always know exactly when a rent increase is validly timed — no manual counting, no guesswork.
Property
42 Mill Lane, Reading, RG1 4PL
Current rent
£950 / month
Proposed rent
£1,025 / month
Effective date
1 December 2026
Amber marks the 2-month notice window before the effective date.
Where Section 13 notices actually go wrong
An invalid notice costs you the whole increase
The wrong effective date, an outdated form, or a mistimed notice can void a Section 13 notice entirely. When it fails, the increase fails with it.
You can't backdate a late notice
Miss the correct window and the earliest possible effective date moves — sometimes by months. There's no do-over once the date has passed.
The 12-month and 2-month rules interact
Every increase needs 12 months since the last one, and 2 months' notice before it takes effect. Tracking that by hand across dozens of tenancies is where mistakes creep in.
How Rentfort works today
Three steps, built around the two rules that actually govern a Section 13 increase.
Add a property and its tenancy
Record the address, current rent, tenancy start date, and rent frequency once — that's the only data entry required.
See exactly when an increase is valid
Every tenancy is checked against the 12-month and 2-month rules automatically. The dashboard flags each one as on track, due soon, or overdue.
Start the increase with the dates already right
No counting months by hand and no guessing at the earliest lawful effective date — it's worked out for you before you begin.