The £500,000 limited-company landlord threshold: two separate rules, two filing obligations

When a limited company buys a residential dwelling in England or Northern Ireland for more than £500,000, two distinct statutory regimes engage on the same transaction. They sit in different Finance Acts, carry different reliefs, run on different filing calendars, and police themselves with different clawback rules. The property press routinely conflates them. This guide separates them — Schedule 4A FA 2003 on one side, ATED on the other — using the rates published by HMRC for 2025-26 and HM Land Registry transaction volumes through Q1 2026.

Volume context, from HM Land Registry Price Paid Data (queried 1 June 2026 against the 30M-row Homecost mirror, calendar 2024): 167,625 residential transactions completed at £500,000 or above; 35,233 at £1m or above; 9,128 at £2m or above. Only a fraction of these involved a "non-natural person" buyer — but every one of them that did engaged both rules below.

This is general information, not advice. Speak to a qualified solicitor, tax adviser, or chartered surveyor before acting.

The two rules in one paragraph

If a company (or a partnership with a corporate member, or a collective investment scheme) acquires a single residential dwelling worth more than £500,000:

1. SDLT — Schedule 4A FA 2003 charges a flat 17% on the whole purchase price ("the higher rate"). A claim for property-rental-business relief under paragraph 5 can switch the charge back to the standard residential slabs plus the 5% additional-property surcharge — but with a three-year clawback window.
2. ATED — Part 3 Finance Act 2013 imposes an annual charge based on a banded valuation, plus an annual ATED return obligation. Property-rental relief reduces the chargeable amount to nil, but the ATED Relief Declaration Return must still be filed every year or Schedule 55 TMA 1970 late-filing penalties accrue.

Two reliefs. Two filing obligations. Two clawback risks. One transaction.

Rule 1 — SDLT under Schedule 4A FA 2003

What the rule does

Schedule 4A FA 2003 (inserted by Finance Act 2012) imposes a single flat-rate SDLT charge on a "high-value residential transaction" where the buyer is a "non-natural person" (NNP). The rate started life at 15%. From the Autumn Budget 2024, and for transactions with an effective date on or after 31 October 2024, that rate rose to 17% (alongside the increase in the additional-property surcharge from 3% to 5%).

A non-natural person in this context (Sch 4A para 3) means a company, a partnership with at least one corporate member, or a collective investment scheme. Trustees of a settlement holding the legal title for the trust are not, by default, an NNP — but a corporate trustee can be.

Worked example — £750,000 acquisition

Without any relief, on a transaction completing in 2026:

With property-rental-business relief claimed under Sch 4A para 5 — see next section — the same transaction is charged on the residential slab tables plus the 5% additional-property surcharge:

The relieved figure of £65,000 sits £62,500 below the flat-17% figure. Source: HMRC SDLT manual SDLTM09500 and the residential rates table at gov.uk.

Schedule 4A paragraph 5 — property-rental-business relief

Relief from the flat 17% rate is available where the dwelling is acquired "exclusively for one or more of" the purposes listed in Sch 4A — most commonly:

• Para 5: exploitation as part of a qualifying property rental business, meaning a property rental business (within s. 263 ITTOIA 2005 or s. 207 CTA 2009) carried on on a commercial basis with a view to profit, where the property is let on a commercial basis to persons not connected with the purchaser.
• Para 5B: development or redevelopment for resale.
• Para 5C: trading stock of a property-trading business.
• Para 5G: open to the public for at least 28 days a year.

The point that catches the most buyers is the arm's-length, unconnected-tenant requirement in paragraph 5. A company landlord that buys a £750k flat and lets it to a director or a director's relative does not qualify — the letting is not to an unconnected person. The relief is unavailable, and the full 17% bites.

The three-year clawback

Where relief was claimed but the property is put to a non-qualifying use within three years of the effective date — for example, occupied rent-free by a connected individual, or withdrawn from the rental business — the relief is withdrawn under Sch 4A para 5H and the additional SDLT is payable. A further return must be filed within 30 days of the disqualifying event.

The clawback charge equals the difference between the higher 17% rate and whatever rate was actually paid on the original transaction.

Rule 2 — ATED (Annual Tax on Enveloped Dwellings)

What the rule does

ATED was introduced by Part 3 of the Finance Act 2013. It imposes an annual charge on a non-natural person owning a single-dwelling interest worth more than £500,000 on the relevant valuation date. The chargeable period runs 1 April to 31 March. Whoever holds the qualifying interest on 1 April is the chargeable person for that period (subject to part-year apportionment for acquisitions and disposals).

2025-26 chargeable amounts

The chargeable amounts for the year beginning 1 April 2025, published by HMRC at gov.uk: ATED chargeable amounts:

(Figures are uprated annually by CPI; check gov.uk for the 2026-27 figures once published.)

The valuation is fixed for a five-year period. The most recent revaluation date is 1 April 2022, and that figure drives ATED returns for chargeable periods 2023-24 through 2027-28. The next revaluation date is 1 April 2027.

The annual ATED return

A separate ATED return (form ATED1, filed via the ATED online service) is due each year by 30 April for any property held on 1 April of that chargeable period. New acquisitions trigger an ATED return due 30 days after the effective date.

Late filing carries Schedule 55 TMA 1970 penalties: an initial £100 fixed penalty, daily penalties of £10/day for 90 days after three months late, then a 5% or £300 (whichever is greater) tax-geared charge at six months, and again at twelve months.

Reliefs — including the property-rental-business relief

Sections 132 to 150 FA 2013 set out the ATED reliefs. The most common for landlord-owned dwellings is property-rental-business relief (s. 133): the chargeable amount is reduced to nil for a qualifying rental property let to unconnected persons on a commercial basis.

Two important consequences:

1. The chargeable amount is nil — but a Relief Declaration Return (ATED1) is still required each year. Filing the relief claim is what gets the charge to nil. Skip the form and the standard chargeable amount becomes the default tax-due figure, with Schedule 55 penalties on top.
2. The relief is property-by-property. A landlord with five sub-£1m corporate-owned flats files one ATED1 covering all five — but each one needs to qualify individually.

ATED clawback

Where a property has had ATED relief but is then put to a non-qualifying use during the chargeable period — for example, lent to a connected individual rent-free — relief is withdrawn for the entire year. ATED runs on chargeable days: a single day of non-qualifying use can disqualify the relief for the whole period unless the rules on minor occupation by a connected person (s. 138, the "non-qualifying individual" carve-outs) apply. The standard penalty regime applies if the disqualifying event is not reported via a further ATED return.

Side-by-side: the two rules on a £750,000 corporate-owned BTL

What the data shows about exposure

The cohort of dwellings potentially within scope of these rules — single residential properties trading at £500,000 or above — has been remarkably steady, even as overall transaction counts have softened:

(Source: HM Land Registry Price Paid Data, queried 1 June 2026; counts reflect all buyer types — only a minority will be NNP purchases.)

The Sch 4A flat rate is the rule that determines whether a corporate acquisition above £500k is workable economically. The ATED return is the rule that determines whether it stays compliant after completion. They are independent enough that getting one right does not protect against getting the other wrong.

What to check before any single-dwelling corporate purchase above £500,000

Even where the structure is being arranged by a conveyancer and a tax adviser, the buyer-side checklist for the twin rules is short:

• At completion: confirm the SDLT1 reflects whichever rate is being paid — flat 17% or relieved slab + 5% — and that any Sch 4A para 5 relief claim names the qualifying business.
• By 30 April after acquisition: file the first ATED return (ATED1) or, where relief applies, the Relief Declaration Return.
• At each 1 April thereafter: file another ATED return for as long as the property is held.
• Whenever the use of the property changes: check both clawback regimes. A tenancy granted to a connected person can trigger both the SDLT three-year clawback and the same-year ATED chargeable-day rules.

For a wider view of how the corporate route compares to personal ownership across the full life of an investment, see the corporate vs personal buy-to-let cost stack. For the SDLT mechanics at the £500,000 boundary itself, see the £500,000 stamp duty cliff edge. For non-UK corporate buyers, the non-resident SDLT surcharge refund claim sits on top of these rules.

For the headline transaction picture on a postcode-by-postcode basis, run a Birmingham B1 1AA lookup — or any other postcode — through the Homecost calculator. Browse more cost-intelligence guides for the wider series.

This is general information, not advice. Speak to a qualified solicitor or tax adviser before acting on any of the rules described above.