Know About Let Property Campaign: The Landlord's Guide to HMRC's Voluntary Disclosure Route

HMRC's Let Property Campaign (LPC) has been open since 9 September 2013 with no announced end date. It is the published voluntary-disclosure route for residential landlords (UK and non-UK resident) with undisclosed rental income. Twelve years into the campaign, the LPC remains the operationally dominant route for accidental landlords, inheritance recipients with a year or two of unreported rent, long-term landlords whose returns omitted rental income on one property in a multi-property portfolio, and ex-tenants who have moved back into a property after a let-out period and now realise the historic rents were taxable.

The LPC is not a standalone statutory regime. It sits within the existing Schedule 41 of the Finance Act 2008 (failure-to-notify) penalty framework and the Schedule 24 of the Finance Act 2007 (inaccuracy) penalty framework. The campaign unlocks unprompted-disclosure mitigation floors for taxpayers who self-correct via the LPC channel rather than waiting for HMRC discovery. The route operates under TMA 1970 section 7 (notification of chargeability), with discovery time limits at sections 34 and 36 governing the disclosure period.

This page is the orientation read for the LPC cluster. It covers the definitional scope, the three-step Notify-Disclose-Pay process with the 90-day window, the penalty architecture including the distinction between Schedule 41 and Schedule 24 mitigation floors (the load-bearing point that the 12-month qualifier sits on Schedule 41 paragraph 13 only, not on Schedule 24 paragraph 10), the offshore Category 2 and Category 3 uplifts, the discovery time-limit framework, and the boundary against the Digital Disclosure Service (DDS), the Worldwide Disclosure Facility (WDF), and Code of Practice 9 (CoP9) routes.

The statutory architecture LPC sits inside

The LPC is administrative HMRC practice. The underlying statutory framework runs through three separate provisions:

• TMA 1970 section 7: the chargeability-notification obligation. A taxpayer with new chargeability to income tax (including new rental income) must notify HMRC within 6 months of the end of the tax year in which liability arose. Failure to notify triggers Schedule 41 exposure. The LPC is the remediation route for that failure.
• Schedule 41 FA 2008: the failure-to-notify penalty framework. Paragraph 5 sets the maximum penalty bands (30% non-deliberate, 70% deliberate, 100% deliberate-concealed). Paragraph 13 sets the mitigation floors on disclosure, including the 12-month qualifier on the 0% non-deliberate unprompted floor (the disclosure must be within 12 months of the tax becoming payable for the 0% floor; otherwise the floor moves up).
• Schedule 24 FA 2007: the inaccuracy-penalty framework. Applies where the taxpayer HAS filed self-assessment returns but those returns are inaccurate or under-stated. Paragraph 4 sets the maximum bands (30% careless, 70% deliberate, 100% deliberate-concealed). Paragraph 10 sets the mitigation floors. Schedule 24 paragraph 10 has NO 12-month qualifier on the unprompted 0% careless floor; the qualifier exists at Schedule 41 paragraph 13 only.

The Schedule 41 versus Schedule 24 distinction is the most operationally significant feature of LPC penalty analysis. A landlord who has NEVER filed an SA return for the relevant rental years sits in Schedule 41 (failure to notify). A landlord who has filed SA returns but understated the rental income sits in Schedule 24 (inaccuracy). The two regimes produce different mitigation profiles, and the 12-month qualifier on the Schedule 41 unprompted 0% non-deliberate floor can move the floor by tens of percentage points depending on the year-by-year timing of the disclosure.

Eligibility: who can and cannot use the LPC

The LPC is for residential landlords with undisclosed rental income. The scope is precise. Sessions writing on LPC must hold the eligibility line:

• UK-resident residential landlords: within scope. The most common LPC population.
• Non-UK-resident landlords with UK-source rental: within scope. The LPC accommodates the non-resident landlord scheme (NRL) interaction. NRL governs the operational withholding; LPC remediates undisclosed historic rental.
• Limited companies: OUTSIDE scope. A LtdCo with undisclosed rental income uses the Digital Disclosure Service or a corporation-tax-specific channel, not the LPC.
• Trusts: OUTSIDE scope. Undisclosed rental income held through a trust uses the SA900 amendment route or the DDS, not the LPC. Trust-registration obligations under the Trust Registration Service operate separately.
• Commercial-property landlords: OUTSIDE scope. Disclosure for commercial-property rental uses the DDS.
• Landlords with offshore-source rental income: typically OUTSIDE LPC scope and within WDF scope. The boundary is the location of the income source, not the residence of the landlord. A UK-resident landlord with a Spanish villa let to holidaymakers discloses through the WDF, not the LPC.

The line between UK-source and offshore-source rental can be technical at the margin. A property physically located in the UK and let to UK tenants is UK-source regardless of whether the landlord is resident in Spain, France, or Canada. A property physically located overseas is offshore-source even if the landlord is UK-resident and the rent is paid into a UK bank account. The location of the property, not the location of the landlord or the location of the rent payment, drives the routing decision.

The three-step process: Notify, Disclose, Pay

The LPC operational architecture is set out on HMRC's published guidance at gov.uk/guidance/let-property-campaign. Three steps:

Step 1: Notify

The landlord notifies HMRC of the intention to disclose via the gov.uk LPC notification form. The notification does not require detailed figures at this stage; it identifies the landlord and the broad nature of the disclosure (years covered, type of property activity, number of properties). HMRC issues an acknowledgement and a Disclosure Reference Number (DRN). The DRN is used in all subsequent correspondence.

There is no penalty consequence at the notification stage. The landlord has self-identified to HMRC as having a disclosure to make. The 90-day clock for the substantive disclosure starts running from HMRC's acknowledgement.

Step 2: Disclose

Within 90 days of HMRC's acknowledgement, the landlord submits a full substantive disclosure. The disclosure covers, for each tax year within the disclosure period:

• Gross rental income per property.
• Allowable deductions (repairs, agent fees, insurance, mortgage interest with the Section 24 restriction layered in for years post-2020/21).
• Net rental profit, taxed at the landlord's marginal income-tax rate for the year.
• Interest on the underdpaid tax, calculated from the original SA payment date.
• The proposed penalty for the year, calculated against the Schedule 41 or Schedule 24 framework as appropriate.
• Any capital disposals during the disclosure period requiring CGT computation (a property sold mid-window, with under-declared CGT alongside the under-declared rental).

The supporting evidence pack includes bank statements showing rental receipts, agent statements where used, mortgage statements substantiating interest deductions, expense receipts substantiating other allowable costs, and (where there were disposals) the contract and completion documentation.

Step 3: Pay

The full disclosed liability (tax plus interest plus penalty) is paid on or before submission of the disclosure. Time-to-pay arrangements may be agreed with HMRC in advance where the aggregate liability is material; the time-to-pay route is the operational exception, not the rule, and should be opened before submission rather than after.

A disclosure submitted without payment is not a completed LPC disclosure. The mitigation floor for unprompted disclosure depends on the disclosure being substantively complete, and HMRC has consistently treated payment-on-submission as part of substantive completeness.

The Schedule 41 versus Schedule 24 distinction

The load-bearing distinction. A landlord who has never filed self-assessment returns for the relevant rental years sits in Schedule 41. A landlord who has filed SA returns but understated the rental income sits in Schedule 24. The two regimes produce different mitigation profiles.

Schedule 41 FA 2008 mitigation floors (failure to notify)

• Non-deliberate, unprompted disclosure within 12 months: 0% (the optimum outcome).
• Non-deliberate, unprompted disclosure after 12 months: 10%.
• Non-deliberate, prompted disclosure: 10%.
• Deliberate, unprompted disclosure: 20%.
• Deliberate, prompted disclosure: 35%.
• Deliberate-concealed, unprompted disclosure: 30%.
• Deliberate-concealed, prompted disclosure: 50%.

The 12-month qualifier on the Schedule 41 non-deliberate 0% floor matters operationally. The Aldridge-Estate accidental landlord scenario illustrates. The landlord inherited a property in 2022 and let it out from January 2023. Did not register for self-assessment or declare rental income for 2022/23, 2023/24, or 2024/25. Gross rents £14,000 / £18,000 / £19,000.

The 2022/23 tax was due 31 January 2024. By the time the LPC notification goes in (say, mid-2026), the 12-month qualifier is exceeded for the 2022/23 year. The unprompted floor for 2022/23 moves from 0% to 10%. The 2023/24 tax (due 31 January 2025) and the 2024/25 tax (due 31 January 2026) may still qualify for the 0% floor depending on the exact timing. A year-by-year analysis is essential; the floor is not the same across the disclosure period.

Schedule 24 FA 2007 mitigation floors (inaccuracy)

• Careless, unprompted disclosure: 0% (no 12-month qualifier).
• Careless, prompted disclosure: 15%.
• Deliberate, unprompted disclosure: 20%.
• Deliberate, prompted disclosure: 35%.
• Deliberate-concealed, unprompted disclosure: 30%.
• Deliberate-concealed, prompted disclosure: 50%.

The Mawell-Estate scenario illustrates the Schedule 24 path. The landlord has filed SA returns since 2018/19 but only declared 70% of rental income (under-declaring the income from one property in a 4-property portfolio). The 2024/25 review identifies the historic understatement. The landlord HAS filed returns, so Schedule 24 is the operative regime. Careless-unprompted floor at 0% applies, with NO 12-month qualifier; the qualifier exists only on Schedule 41 paragraph 13. The drafting trap is to import the Schedule 41 qualifier into Schedule 24 commentary by analogy; the regimes are statutorily distinct and the qualifier sits on one only.

Offshore Category 2 and Category 3 uplifts

Where the property or income has an offshore element, Schedule 41 paragraph 6A and Schedule 24 paragraph 4A operate the Category uplift architecture. Category 1 territories (the UK and selected close-cooperation jurisdictions) attract no uplift. Category 2 territories attract a 1.5x multiplier on the standard penalty. Category 3 territories attract a 2x multiplier. The territory lists are HMRC-published and updated periodically.

The uplift bites on the LOCATION of the income or asset, not on the LANDLORD's residence. A UK-resident landlord with a UK BTL property has no Category uplift exposure. A UK-resident landlord with a Spanish villa let to holidaymakers has Category 2 exposure (Spain is typically Category 1 or 2 depending on the year; the published list governs). A non-UK-resident landlord (say, Spain-resident) with a UK BTL property has no Category uplift on the UK BTL because the income source is UK; the WDF route would govern any Spanish-source rental.

The Singh-Estate non-resident scenario illustrates. The landlord is UK-tax-resident in Spain and owns a UK BTL property let since 2019, rents received gross with no NRL withholding. Failure to notify under TMA 1970 sections 7 and 8 (the non-resident landlord variant). Schedule 41 applies. The UK-source rental income remains Category 1 regardless of the landlord's Spanish residence; the offshore uplift does not engage. The route is LPC, not WDF.

The disclosure period: how many years to cover

The disclosure period mirrors HMRC's discovery window under TMA 1970 section 36:

• Innocent error: 4 years from the end of the relevant tax year (section 34).
• Careless behaviour: 6 years (section 36(1)).
• Deliberate behaviour: 20 years (section 36(1A)).
• Offshore innocent error: 12 years (section 36A, inserted by Finance Act 2019).

The behavioural characterisation drives the period. A landlord who genuinely did not know rental was taxable and disclosed promptly on learning typically falls on the innocent-error or careless side. A landlord who knew rental was taxable and decided not to declare typically falls on the deliberate side, opening the 20-year reach-back.

Sessions writing on LPC must be honest with readers about the time-limit architecture. Understating the disclosure period to "save" tax does not survive HMRC scrutiny. If HMRC concludes that the conduct was deliberate over a 20-year period, the disclosure will be expanded to 20 years and the penalty will move toward the deliberate-prompted floor (35% or 50%) rather than the unprompted floor (20% or 30%). The all-in cost of a half-disclosure can be materially worse than a full disclosure from the start.

The LPC versus DDS versus WDF versus CoP9 boundary

Four voluntary-disclosure routes operate in parallel on the HMRC published-route landscape. Choosing the right route is part of the orientation question.

• Let Property Campaign (LPC): residential landlords with undisclosed rental income (this page).
• Digital Disclosure Service (DDS): general voluntary-disclosure umbrella for most other UK tax matters. Employment income, dividends, self-employment, capital gains, non-rental property matters, LtdCo disclosures. Operates online via gov.uk in a notify-disclose-pay pattern broadly mirroring LPC.
• Worldwide Disclosure Facility (WDF): offshore-source income or assets. A UK landlord with a foreign rental property, foreign investment income, or foreign bank accounts with undisclosed interest goes through the WDF, not LPC or DDS.
• Code of Practice 9 (CoP9) / Contractual Disclosure Facility (CDF): civil-route framework for SUSPECTED SERIOUS FRAUD. Carries conditional immunity from criminal prosecution if the taxpayer makes a full and frank disclosure within the 60-day window. CoP9 is HMRC-initiated; the taxpayer receives a CoP9 letter rather than choosing the route, and specialist tax-investigation counsel should be engaged before responding.

The Carmichael-Estate scenario illustrates the LPC versus CoP9 boundary. The landlord has 8 years of undisclosed rental income across a 6-property portfolio. The undeclared amount is around £280,000 of gross rents over 8 years. The landlord became aware of the obligation 4 years ago but did not act. The 4-year delay AFTER becoming aware risks characterisation as deliberate conduct; the aggregate amount and the deliberate-conduct element approach the threshold where HMRC may consider criminal-prosecution interest.

The LPC versus CoP9 decision turns on HMRC's posture. If HMRC has issued a CoP9 letter, the appropriate route is CoP9, not LPC. If HMRC has not made contact and the taxpayer is self-initiating, LPC may still be the right route for non-deliberate or carelessly-deliberate cases. Where HMRC perceives serious fraud, attempting an LPC route will not provide criminal-prosecution immunity; only CoP9 does that. Engage specialist representation early for serious-fraud-suspected cases.

What incomplete or false disclosure costs

An LPC disclosure that is incomplete or false exposes the taxpayer to a worse position than no disclosure. The Schedule 24 deliberate-concealed penalty at 100% maximum applies on the additional concealed amount. The deliberate-concealment characterisation opens the 20-year reach-back under TMA 1970 section 36(1A). Criminal-prosecution risk attaches to the concealed element.

The discipline. The LPC route works only with a full and frank disclosure. Where the landlord is unsure of historic figures (lost rent records, missing bank statements, unclear deduction history), the disclosure should over-include rather than under-include and should flag the uncertainty to HMRC. HMRC has consistently taken a constructive view on disclosures that show evident good faith on incomplete information. A disclosure that selectively omits known income or known years invites a deliberate-concealment characterisation.

What to expect after submission

HMRC processes the disclosure and the payment. The typical timeline:

• 0 to 4 weeks after submission: HMRC acknowledges receipt of the disclosure and the payment.
• 4 to 16 weeks: HMRC reviews the disclosure against the underlying records (where HMRC holds parallel data from agent reports, mortgage providers, or other third-party sources). Most disclosures are accepted at this stage without further enquiry.
• Where HMRC raises questions: follow-up correspondence asks for additional evidence or clarification on specific points. The landlord responds within HMRC's stated window; further iterations may follow.
• Closure: HMRC issues a closure letter confirming the disclosure is accepted, with the agreed tax, interest, and penalty quantified. The tax position is then settled for the disclosed years.

Where HMRC fundamentally disagrees with the disclosure (typically on the behavioural characterisation, the disclosure period, or the deduction methodology), the route can escalate to a formal enquiry under TMA 1970 section 9A or a discovery assessment under section 29. Most LPC disclosures do not escalate; the route exists precisely because HMRC values voluntary self-correction over investigation.

Where this orientation page sits in the LPC cluster

This page is the definitional plus process-walkthrough layer of the LPC cluster on this site. It coexists with several sibling pages, each targeting a distinct intent:

• The benefits decision-layer page: for readers weighing "why disclose at all" rather than "what is the LPC".
• The penalty calculator page: for readers needing illustrative numbers on a specific fact-pattern.
• The vs-no-disclosure decision page: for readers comparing the LPC route against the do-nothing position.
• The remediation narrative page: for readers in the "I didn't know rental was taxable" cohort.
• The DDS umbrella page: for the broader voluntary-disclosure landscape that includes non-rental UK matters.
• The disguised-remuneration loan charge page: for the parallel non-rental disclosure route that sits inside the same cluster home but operates on a different statutory regime.

If you have undisclosed rental income and you need an independent view on whether LPC is the right route, what the Schedule 41 versus Schedule 24 distinction means for your specific year-by-year position, how the 12-month qualifier affects your earliest year, and how to assemble the supporting evidence pack for the 90-day window, we work with landlords on the orientation analysis and through the substantive disclosure to closure.