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Tax & Company

Landlord Incorporation Calculator

Should your property portfolio move into a limited company? The costs, the tax and the break-even point

£20

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Landlord Incorporation Calculator

Overview

Since mortgage interest stopped being deductible for individual landlords (the finance cost restriction, often called 'Section 24'), many landlords have asked whether they should move their properties into a limited company. A company deducts all its mortgage interest and pays corporation tax at 19%–25%, so the annual tax bill can be much lower. But moving in is expensive: you are treated as selling every property to the company at market value, which can trigger capital gains tax (CGT) and stamp duty land tax (SDLT), the mortgages usually have to be refinanced, and getting money out of a company costs more tax. This workbook puts all of that in one place and compares the two routes over ten years.

Price
£20
Who it’s for
Tax & Company
Works with
Microsoft Excel for Windows and Mac
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See how it works

A walk through the main sheets

The sheets you will use most, in the order you will use them – shown with the sample data every workbook comes with.

Step 1

Properties

Up to ten properties. What you do: enter the yellow cells.

Properties
Transfer Costs

Step 2

Transfer Costs

SDLT rate tables, property-by-property figures, SDLT on three bases, CGT for each owner, ERCs and fees, the company's opening position and the s162 checklist. What you do: update the yellow SDLT rates if they change.

Step 3

Projection

Ten years for both routes, with every step of the tax shown. What you do: nothing to enter.

Projection
Sensitivity

Step 4

Sensitivity

Net worth advantage and cash break-even year for 30 combinations of interest rate change and rent growth. What you do: change the yellow axis values if you like.

Who it is for

Made for people like you

  • Example – text
  • Landlords with a growing, mortgaged portfolio – A clear view of whether the annual saving ever pays back the cost of moving in.
  • Joint owners (e.g. married couples) – Each owner's own tax bands, CGT and dividend tax worked out separately.
  • Landlords thinking about the future – Net worth at your chosen year, with the tax that would be due on a sale or on winding up the company.
  • Accountants and advisers – A transparent, printable model to talk a client through before detailed advice.
  • WATCH OUT – This is a complex area of tax law. Whether incorporation relief applies depends on the facts of your business; SDLT reliefs for partnerships are narrow; and HMRC actively challenges schemes it sees as avoidance (Spotlights 63 and 69). Use this workbook to understand the numbers and the questions to ask – not as the answer. Always take professional advice before transferring any property.

Quick start

Up and running in minutes

  1. Example – text
  1. Settings – Choose the tax year, Sole or Joint ownership, each owner's name, other income and share, then your plans (holding period, growth, selling costs, how to measure net worth), how a company would pay you, the company's mortgage rate and extra costs, and the incorporation choices (s162, loan account, SDLT basis, fees).
  2. Properties – Enter each property on its own row: market value now, original cost, date bought, mortgage balance and rate, early repayment charge %, monthly rent, void weeks, running costs and the number of dwellings.
  3. Transfer Costs – Check the SDLT on each basis, the CGT for each owner, the ERCs and fees – and read the s162 checklist.
  4. Projection – Follow both routes year by year: tax, cash to you, cumulative cash and net worth.
  5. Sensitivity – See how the answer changes if interest rates or rent growth differ from your assumptions.
  6. Dashboard – Read the verdict, the four headline tiles, the side-by-side table and the charts.

Key features

  • Up to ten properties with value, original cost, mortgage, rent and running costs; sole or joint ownership and each owner's other income.
  • One-off costs: CGT at market value with optional incorporation relief (s162), SDLT on three bases including the 5% surcharge and 6+ dwellings, early repayment charges and refinancing.
  • Ten years side by side: personal ownership (finance cost restriction, 2027/28 property rates) vs a company (corporation tax with marginal relief, dividends, salary or retained profit).
  • Cumulative cash to you, break-even year, net worth with latent CGT and corporation tax, an interest rate × rent growth sensitivity grid and strong 'take advice' checks.

What’s included

  • Dashboard – Verdict, break-even, net worth and charts
  • Settings – Owners, plans, extraction and one-off costs
  • Properties – The portfolio
  • Transfer Costs – CGT, SDLT, ERCs and the company's opening position
  • Projection – 10 years, personal vs company
  • Sensitivity – Interest rates × rent growth
  • Tax Rates – Income, property, dividend, CT and CGT rates
  • Guide – How to use this workbook

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