SDLT paragraph 9 separation: the evidence checklist
When you buy a home in England or Northern Ireland and someone in the transaction already owns another dwelling, the 5% Stamp Duty Land Tax surcharge for additional properties applies to the whole purchase price on any dwelling costing £40,000 or more (HMRC, higher rates for additional properties, 2026). For married couples and civil partners, the reach of that rule is wider than most buyers expect: Finance Act 2003, Schedule 4ZA, paragraph 9 treats a couple who are "living together" as a single unit, so a property owned by one spouse is attributed to the other for the higher-rate test.
The carve-out is separation. If the couple are not living together at the effective date of the purchase, paragraph 9 does not aggregate their interests and the surcharge can fall away. But "not living together" is not a box you tick — it is a factual state you have to be able to prove. The entire dispute in a paragraph 9 case is evidential.
On a home bought at the England median sale price of £290,000 (833,817 residential transactions recorded in 2025; HM Land Registry Price Paid, figures fetched 4 July 2026), the stakes are concrete:
| Scenario | Standard SDLT | 5% surcharge on full price | Total |
|---|---|---|---|
| Buyer's only dwelling (separation established) | £4,500 | £0 | £4,500 |
| Additional dwelling under paragraph 9 | £4,500 | £14,500 | £19,000 |
Standard SDLT: 0% to £125,000; 2% on £125,000–£250,000 (£2,500); 5% on £250,000–£290,000 (£2,000). The surcharge is a flat 5% on the whole £290,000 (HMRC, SDLT residential rates, 2026). The gap the evidence has to close is £14,500 — and it turns entirely on documents.
This is a companion to the wider explainer on separated spouses and the additional-property surcharge, which sets out the three separation routes. This piece drills into the layer underneath: what HMRC and the First-tier Tribunal have treated as proof, and what they have treated as noise.
The one day that matters: the effective date
Paragraph 9 tests whether the couple were living together at the effective date of the transaction — for most purchases, the completion date (Finance Act 2003, section 119). That single day is the reference point, and it has two consequences that catch buyers out:
- Status is fixed on that day. If the couple were living together on the effective date, paragraph 9 applies even if they separate the following week. If they were genuinely separated on the effective date in circumstances that looked permanent then, a later reconciliation does not claw the relief back.
- The evidence has to pre-date the effective date. A council tax discount letter, a tenancy, or a deed dated after completion shows the position later — not on the day the statute tests. Evidence created only once an enquiry has opened is the weakest category of all.
Because the test is a snapshot of a single day, transient or ambiguous arrangements around that day — one spouse "temporarily" staying elsewhere, a second address used only for post — attract close scrutiny. HMRC's own guidance cross-refers the SDLT living-together test to the income-tax definition in section 1011 of the Income Tax Act 2007, under which spouses are treated as living together unless separated under a court order, by a deed of separation, or in fact in circumstances likely to be permanent.
The governing principle: contemporaneous beats retrospective
In any SDLT appeal, the burden of displacing HMRC's assessment rests with the taxpayer, on the balance of probabilities. The tribunals apply a consistent evidential hierarchy: documents created at the time, for an unrelated purpose, carry far more weight than statements written later to support a tax position.
A council tax authority does not award a single-person discount to help someone's stamp duty return — it awards it because one adult lives at an address. That independence is exactly what gives the document its force. A witness statement drafted after an enquiry opens, by contrast, is evidence of what the parties now say happened, not of what a neutral third party recorded at the time. It is admissible, but on its own it rarely carries a paragraph 9 case.
The checklist: what carries weight, and what does not
The table below groups the documents most often produced in paragraph 9 separation questions by the evidential weight they typically carry. It describes patterns seen in HMRC practice and tribunal reasoning — it is not a formula, and no single item is decisive on its own.
| Document | What it evidences | Typical weight |
|---|---|---|
| Sealed court order — judicial separation order, or a financial order recording the separation date | Route 1: separation under a court order | Decisive for the statutory route it satisfies |
| Deed of separation, executed by both parties and dated before the effective date | Route 2: separation by deed | Decisive for that route |
| Divorce application, conditional order, or final order (with dates) | Formal breakdown under way at a fixed date | Strong — dated, third-party issued |
| Council tax single-person discount award letter for one spouse's new address, dated before completion | A separate single-adult household existed on the ground | Strong — contemporaneous, independent |
| Two residential tenancy agreements or a second mortgage, in each spouse's name at different addresses | Two genuinely separate households | Strong |
| Utility bills in each spouse's name at different addresses across several months | A settled, not overnight, separation | Moderate — stronger as a run, weak as a single bill |
| Bank and card statements showing an address change; GP re-registration; electoral roll entry; children's school correspondence | Corroboration of a real move | Moderate — best in combination |
| A single recently issued utility bill, or a redirected-post confirmation alone | Little more than an address on a page | Weak |
| Witness statements from the couple or family, written after an enquiry opens | The parties' later account | Weak on its own |
Since 6 April 2022, divorce in England and Wales follows a set sequence — a divorce application, then a conditional order (a minimum of 20 weeks later), then a final order (a minimum of six weeks after that). These replaced the former "petition", "decree nisi" and "decree absolute", though the older terms still appear on pre-2022 paperwork and remain valid evidence of their own dates. Each carries a date issued by the court, which is what makes the sequence useful: it pins the breakdown to fixed points that cannot be back-written.
The council tax discount is a particularly clean marker because it is both dated and quantified. A single-person discount is a 25% reduction for a household with only one adult (gov.uk, council tax discounts, 2026). On a Band D bill that is worth, for 2026-27, roughly £590 a year in Birmingham (Band D £2,362.90), £578 in Manchester (£2,312.04) and £262 in Westminster (£1,049.55) — nationally from about £257 in Wandsworth to £691 in Dorset. The saving is beside the point for SDLT; what matters is that a billing authority independently recorded one adult at a new address on a dated letter.
What a weak evidence bundle looks like
The recurring pattern in refused paragraph 9 arguments is not dishonesty — it is thin, late, or ambiguous documentation:
- A single document, freshly dated. One utility bill issued days before completion shows an address, not a settled separation.
- Everything created after the enquiry letter. A bundle of statements and letters all dated after HMRC wrote is, on its face, a response to the enquiry rather than a record of the effective date.
- Continuing joint arrangements. A joint account still funding the household, post still arriving at the original address, or one spouse listed as the second occupant somewhere all cut against "not living together".
- A stated intention rather than a state of affairs. Evidence that the couple planned to separate, without evidence they had by the effective date, does not meet the test.
None of this makes a genuine separation unprovable — it means the weight sits on records made at the time, for reasons unconnected to the tax.
After completion: the file and the enquiry
Where the separation carve-out is relied on at completion, the conveyancer files the SDLT return on the buyer's instruction and keeps the supporting documents on file. If HMRC opens an enquiry within the nine-month window under Schedule 10 paragraph 12 FA 2003, that file is the first line of evidence — which is why what was gathered before completion matters so much more than what can be assembled afterwards.
A separated buyer who paid the surcharge because the former family home had not yet been sold sits in a different mechanism — the 36-month replacement refund, covered in the additional-property surcharge refund route explained. The evidential discipline is the same one that runs through the day-counting and residence evidence standards in the non-resident surcharge context: contemporaneous, third-party, dated. For the wider mechanics of the surcharge itself, see the additional-property stamp duty surcharge explainer.
What this is and is not
This is a procedural explainer anchored in HMRC's published rules and the evidential approach the tribunals apply. It is not a checklist to follow in a specific case, and it is not advice on whether a particular separation meets the paragraph 9(3) test — separation status, the effective date, the order in which the former home is sold, and the documents available at filing are all fact-sensitive, and the penalty exposure for getting the higher-rate answer wrong under Schedule 24 FA 2007 is real.
This is general information, not advice. Speak to a qualified conveyancer, and in any contested matrimonial finance situation a family-law solicitor, before relying on the paragraph 9(3) carve-out.
To see the all-in cost of a purchase at a real postcode — SDLT, the mortgage at the current Bank of England 75% LTV five-year fixed quoted rate of 4.32% (April 2026), the council tax band, and EPC-based running costs — try Homecost for a Manchester postcode or browse the other Cost Intelligence guides.
Based on 30.98M HM Land Registry transactions and the 2026-27 council tax dataset across 296 English billing authorities — see our methodology overview on the blog.