Incorporating an Existing Portfolio: Is It Worth the Cost?

You've read the benefits of holding property through a limited company. Now the question: should you transfer your existing properties into one? The answer is almost always more complex than you'd hope.

The transfer triggers two taxes

When you transfer a property from personal ownership to a company, HMRC treats it as a sale at market value — even though you own both the property and the company. This triggers:

• Capital Gains Tax (CGT): On the difference between your purchase price and current market value (at 24% for higher-rate taxpayers)
• Stamp Duty Land Tax (SDLT): The company pays SDLT on the market value, including the 3% additional dwelling surcharge

Worked example

Property bought for £150,000, now worth £250,000:

• CGT: Gain of £100,000 minus annual exempt amount (£3,000) = £97,000 × 24% = £23,280
• SDLT: On £250,000 at additional rates = £7,500
• Total tax bill to incorporate: £30,780

Plus mortgage redemption fees (if refinancing), legal costs (two conveyances), and new mortgage arrangement fees. The total easily reaches £35,000-£40,000.

When does it pay back?

If the company structure saves you £2,500/year in tax on that property, it takes 12-16 years to break even on a £35,000 incorporation cost. For most single-property landlords, that's too long. For large portfolios with heavy mortgage debt and higher-rate tax exposure, the payback can be much shorter.

Incorporation Relief (Section 162 TCGA)

In some circumstances, you can defer CGT by claiming Incorporation Relief. This requires transferring an entire rental business (not just properties) to the company as a going concern, in exchange for shares. HMRC has specific requirements:

• The rental activity must constitute a genuine business (not just passive investment)
• You must be actively involved in management (not just collecting rent via an agent)
• All assets of the business must transfer (you can't cherry-pick properties)

This relief is contested territory — HMRC has challenged many claims, and tax tribunals have given mixed rulings. Never attempt this without specialist advice.

Alternatives to full incorporation

• Hybrid approach: Keep existing properties personal, buy new ones through a company. Avoids all transfer costs
• Partnership structure: Some landlords use an LLP as an intermediate step, though this adds complexity
• Spouse transfer: If your spouse is a basic-rate taxpayer, transferring beneficial ownership (which is SDLT-exempt between spouses) may achieve similar tax savings without incorporation costs

The bottom line

For most landlords with a small existing portfolio, the hybrid approach (keep existing, buy new through a company) is the pragmatic choice. Full incorporation only makes financial sense for larger portfolios with significant unrealised gains and long holding horizons.