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Welcome to Planifly!

Let us show you around our powerful planning tools. This quick tour will help you get the most out of our platform.

CIL Calculator

Estimate your CIL liability quickly and accurately with up-to-date rates and indexation. The easiest-to-use & smartest CIL calculator available.

Universal Calculator

Data-Driven TPI Defaults

Exceptions & Calculation History

Project Type

New Build Floor Area (sqm)

Existing Building to Demolish (sqm)i

Enter the Gross Internal Area (GIA) of any existing building being demolished. This will be deducted from your new build area to calculate net chargeable area (Reg 40 credit).

Current TPIi

The latest BCIS index (published Nov 1). Adjusts for inflation.

Base TPIi

The index used when CIL schedule was adopted. Our default is 275, taking the smart median across all UK LPA's. (enter your own if known)

Exemptions & Reliefs

Select applicable reliefs (sets CIL to £0).

Minor Development (<100m²)?

New building or extension under 100 m² is exempt.

Annex/Extension relief?

Relief under Reg 42A/B for annexes/extensions.

Self‑Build housing?

Reg 54 relief for owner‑occupiers (3 yrs).

Charitable relief?

Reg 43/44 relief for charities.

Affordable housing relief?

Reg 49/49A relief.

Exceptional circumstances relief?

Reg 55 discretionary relief.

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