Guide · 12 min read
The narrow routes that genuinely avoid SDLT when incorporating a property portfolio, the partnership rules, why most landlords do not qualify, and the schemes to avoid.
Written by Matt Lenzie · Published 10 June 2026
Advice from
Matt Lenzie · 25+ year career banker (Bank of Scotland, Lloyds Banking Group). £300m+ raised for property clients.
25+ year career banker (Bank of Scotland, Lloyds Banking Group). £300m+ raised for property clients.
Transferring property to a limited company without stamp duty is possible in exactly one mainstream situation: where a genuine property partnership incorporates, and the SDLT partnership provisions reduce the charge, potentially to nil. For everyone else, the transfer is a market-value purchase by the company and stamp duty is due in full, surcharge included.
That is a shorter and less exciting answer than the one being sold at property seminars, so let us be clear about who we are and why we are saying it. We are mortgage brokers: we arrange the refinance leg of incorporations, we earn nothing from tax schemes, and we have watched clients arrive with structures that saved stamp duty on paper and bought an HMRC enquiry in reality. This guide sets out how the charge actually works, the narrow routes that genuinely avoid or reduce it, who qualifies, and how to recognise the schemes that should be left alone.
Because the law anticipated the obvious dodge. Ordinarily, stamp duty land tax is charged on the consideration paid. Transfer a property to your own company for £1, and on the ordinary rule there would be almost nothing to tax.
So the legislation applies a special rule to transfers between connected parties and companies: when you transfer land to a company you are connected with, SDLT is charged on the market value of the property, whatever the company actually pays, and whether or not any money changes hands at all. Gifting the property does not help; selling it cheap does not help. Your own company is the definition of a connected company, so the rule catches precisely the landlord incorporation scenario.
On top of the market-value rule sits the additional dwelling surcharge: companies pay the higher rates, 5% above standard SDLT bands in England and Northern Ireland, on every residential purchase, first property included. In Scotland the equivalent is the 8% Additional Dwelling Supplement on the full price. Our limited company stamp duty guide covers the bands; the point here is that an incorporation transfer is a full-fat purchase in HMRC's eyes.
The one substantial statutory exception lives in the partnership provisions of Schedule 15 to the Finance Act 2003. Where a partnership transfers property to a company, the SDLT charge is computed by reference to the partners' connection to the company (the legislation calls the mechanism the "sum of the lower proportions"). In the textbook case, a husband-and-wife property partnership incorporating into a company they own in the same shares, the chargeable consideration can be reduced to nil. No SDLT.
The route is real, it is statutory, and where it applies it works exactly as Parliament drafted it. The qualification is where the honesty matters, because the relief turns on there being a genuine partnership before the transfer, and most joint landlords, whatever a seminar told them, do not have one.
Joint ownership of rental property is not a partnership. A partnership, in the Partnership Act sense, is persons carrying on a business in common with a view of profit: in practice HMRC expects to see the markers of one, typically a partnership self assessment return filed for past years, genuine joint management activity, a business being run rather than investments being held. A couple who own three flats jointly, file the income on their personal returns and use a letting agent are joint investors, and the partnership provisions were not written for them. The distinction sounds pedantic until an enquiry opens; then it is the entire case, and it is decided on years-old facts that cannot be manufactured retrospectively.
Two warnings follow directly. First, a partnership formed shortly before incorporation, purely to harvest the relief, is exactly the pattern HMRC challenges, with anti-avoidance rules in Schedule 15 aimed at it; a genuine partnership tends to have years of history, not months. Second, the assessment is fact-heavy and personal, which is why this route should be implemented by a specialist tax adviser who will put their name to it, not by a checklist from a webinar. Where clients genuinely qualify, we arrange the company mortgages alongside their adviser, and the route works exactly as designed.
No, and the confusion between the two reliefs is the most common misunderstanding we meet. Section 162 incorporation relief, under the Taxation of Chargeable Gains Act, addresses capital gains tax: it rolls the gain on your properties into the shares of the new company, deferring CGT that would otherwise be due on the market-value disposal. It says nothing about SDLT, which is charged on the company's acquisition regardless.
Incorporation relief has its own genuine-business test. Following Ramsay v HMRC (2013), the portfolio must amount to a business rather than passive investment, with the owner's time and activity a central factor; the case is generally read as supporting somewhere around twenty hours a week of genuine property business activity as a strong indicator. A self-managing landlord with a substantial portfolio may well qualify. A landlord with two agent-managed flats will not. Our incorporation relief guide covers the test in detail.
The practical upshot: a full-relief incorporation, no CGT and no SDLT, requires both a genuine business (for Section 162) and a genuine partnership (for Schedule 15). That intersection exists, typically a couple jointly running a sizeable portfolio as their occupation, but it is a minority of the landlords being told they qualify.
A few, all partial:
And one route that avoids the problem entirely: leave existing properties where they are and buy the next one through the company. No disposal, no transfer SDLT beyond the new purchase itself, and the portfolio migrates by attrition. It is the least marketed option because nobody earns a structuring fee from it, and over a ten-year horizon it frequently produces a better after-tax outcome than a costly transfer would, simply because the gate toll was never paid. Our guide to buy-to-let through a limited company covers the buy-side mechanics of that hybrid approach.
Because HMRC is wary of them, publicly and specifically. Arrangements that claim to move property into a company (or a hybrid LLP structure) with no stamp duty, no capital gains tax and continued interest relief have featured in HMRC's avoidance spotlights, and the pattern of these schemes, a manufactured partnership period, circular consideration, contrived steps with no commercial purpose, is what the targeted anti-avoidance rules and the general anti-abuse rule exist to unwind. When a scheme fails, the tax is due with interest, often with penalties, years after the promoter's fee was banked, and sometimes after the promoter has dissolved.
Our test is unglamorous: if the structure only works because of steps you would never take commercially, it is not planning, it is risk with a brochure, and we will say so even when it costs us a refinance case. The statutory routes above need no packaging; a regulated tax adviser can implement them in daylight. A second, quieter problem with the schemes is the lending: mortgage lenders underwrite the ownership structure they are securing against, and several of the hybrid arrangements leave title and beneficial ownership in a shape that mainstream lenders will not lend to, which means the scheme can cost you the refinance even before HMRC has said a word.
Done honestly, the appraisal lists every line before anything is signed:
A sketch of the arithmetic, with deliberately round numbers. A property bought personally for £150,000, now worth £250,000, carries a £100,000 gain; without Section 162, capital gains tax on a higher-rate taxpayer's residential gain takes a substantial slice of that. The company's acquisition at £250,000 market value attracts £15,000 of SDLT at the company rates. Add an early repayment charge on the existing fix, two sets of legal fees and the new facility's costs, and the gate toll plausibly sits north of £40,000 on one property. Against that, suppose the company structure saves £3,000 to £4,000 a year in tax on this property's numbers: the payback runs a decade. Now run the same sums for a six-property portfolio held by a couple who genuinely qualify for both reliefs, where the gate toll collapses toward the transaction costs alone, and payback can arrive in two or three years. Both answers are correct; they belong to different landlords.
If line 5 repays lines 1 to 4 inside a horizon you believe, the transfer earns its place. The refinance leg is ours: the existing personal mortgages are redeemed and the company takes new borrowing, and because the company purchases at market value, the new facility can sometimes be sized against that value rather than your historic equity, occasionally releasing capital in the process. See our transfer property to a limited company service page for how we run that leg, and our stamp duty calculator for the SDLT line on your numbers.
And when the model says no? Then no is the answer, and the structure that saves you the most stamp duty is the one you never pay: keep the existing portfolio personal, incorporate the next purchase. Plenty of our clients across the UK run exactly that hybrid, and it is frequently the best version of the plan.
For most landlords, you cannot, and any adviser who says otherwise without examining your circumstances first should worry you. The two genuine reliefs are narrow: Section 162 incorporation relief can defer capital gains tax where the portfolio is run as a genuine business, and the SDLT partnership provisions can reduce stamp duty to nil where a genuine property partnership (not mere joint ownership) incorporates. Qualifying for both at once is the exception, not the rule. Everything else marketed as tax-free is a scheme with HMRC risk attached.
Budget for capital gains tax on the difference between market value and your purchase price, stamp duty on the company's acquisition at market value including the 5% surcharge (8% ADS in Scotland), early repayment charges on any existing fixed-rate mortgage, valuation and legal fees on both sides, and the costs of the new limited company mortgage. On a typical appreciated property the total commonly runs to five figures, which is why the move should be modelled over a ten-year horizon, not a tax year.
Sometimes. The transfer costs are paid once; the benefits, full mortgage interest deductibility and corporation tax rates instead of Section 24 and higher-rate income tax, recur every year you hold. For a higher-rate taxpayer with a leveraged portfolio and a long horizon, the payback period can be short enough to justify the toll. For one or two properties with modest gains and modest borrowing, it frequently is not. The honest answer comes from modelling your own numbers, not from a seminar.
The only reliable routes are the statutory ones: the partnership provisions in Schedule 15 FA 2003 where a genuine partnership transfers to a company its partners control, and, for six or more dwellings in one transaction, the non-residential SDLT rates, which reduce rather than remove the bill. Spousal transfers can also be SDLT-light in specific circumstances. Schemes that promise blanket SDLT avoidance on standard transfers rely on structures HMRC actively challenges; the saving is provisional, the enquiry risk is not.
We arrange the mortgage leg of incorporations; we do not give tax advice, and the reliefs described here turn on facts only a qualified tax adviser can assess. Engage one before moving anything.
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