The 2020–2021 Stamp Duty Holiday: What It Was and What It Taught Us

On 8 July 2020, with the UK still in the first wave of the Covid-19 pandemic and the housing market essentially frozen by lockdown, Chancellor Rishi Sunak announced a temporary increase in the SDLT nil-rate threshold from £125,000 to £500,000. The policy was promoted as "catching the falling knife" — restarting transactions and protecting jobs in conveyancing, surveying, removals, and the broader chain of housing-related services.

It worked, in the narrow sense that it restarted activity. Whether it was good policy in the broader sense is more contested.

The timeline

8 July 2020 – 30 June 2021: nil-rate threshold raised to £500,000 for all buyers. A maximum saving of £15,000 was available on purchases of £500,000 and above.

1 July 2021 – 30 September 2021: tapered threshold of £250,000.

1 October 2021: reversion to the pre-pandemic £125,000 threshold.

The deadlines were rigid. SDLT applies on the effective date of the transaction (usually completion), so a buyer who exchanged on 25 June 2021 but completed on 1 July 2021 fell into the tapered regime rather than the full holiday.

The frenzy

Transaction volumes hit record levels. June 2021 saw 213,000 residential transactions — the highest single month on record. Conveyancing solicitors worked extreme hours; lenders processed mortgages at unprecedented speed; survey backlogs stretched to weeks. Chains collapsed when one party couldn't complete on time. Stories abounded of buyers shaving thousands off the offer to compensate for a missed deadline.

The price effect

Through the holiday period, UK house prices rose by roughly 10% year-on-year — the fastest rate in over a decade. Many economists argue that the SDLT saving was substantially capitalised into prices, with the net beneficiaries being sellers rather than buyers. The clearest evidence is the geographic distribution: areas with median prices just under the £500,000 threshold saw the sharpest price increases.

The lessons

Stamp duty holidays raise prices. If you make transactions cheaper, demand goes up. If supply is fixed in the short run (and housing supply always is), prices absorb most of the tax reduction. This is the most consistent finding from economic studies of SDLT holidays in the UK and similar policies abroad.

Deadlines create dangerous cliff edges. The frantic completion rush in June 2021 led to chain failures and avoidable losses. Tapering the relief — as Sunak did between July and September 2021 — is fairer than a hard cut-off, though it introduces complexity.

Temporary measures get capitalised quickly. The market priced in the £500,000 threshold within months. When the threshold reverted, the price gains did not. This is the same dynamic that played out, more quietly, between September 2022 and April 2025 — and it's the central lesson for any future SDLT changes. See our deep dive on the April 2025 reversion for the parallel.

Stamp duty is a bad tax — but not for the reasons sometimes claimed. The economic case against SDLT is that it discourages mobility and depresses transaction volumes. A holiday cures that for the duration but doesn't fix the underlying distortion. Lasting reform — replacing or restructuring SDLT — is the bigger question, and is covered in our piece on Lib Dem and Reform positions.

If you bought during the holiday

Your SDLT was calculated on the holiday rates — there's no retrospective adjustment. But the four-year overpayment relief window is still open for purchases completed since May 2022, and even for earlier purchases there may be options if there was an obvious calculation error. Chattels (carpets, white goods, freestanding furniture) deducted from the purchase price often saved buyers further amounts that were missed at the time.