My mum has passed away and left me her house. She used to rent out a room – does that affect the Residence Nil Rate Band for Inheritance Tax in any way, or is it just the main property value that counts?

Quick Answer

Renting out a room in a property used as a main residence doesn't typically disqualify it from the Inheritance Tax Residence Nil Rate Band (RNRB). Eligibility hinges on it being considered the deceased's home.

## Understanding Residence Nil Rate Band Eligibility The Residence Nil Rate Band (RNRB) of £175,000 per person, fully transferable between spouses or civil partners, can apply to a property forming part of the deceased's estate, provided it was occupied as their home and passed to direct descendants. The critical factor is establishing the property was the main residence. Where a room was rented out, this does not automatically disallow the RNRB, so long as the property was undeniably the deceased's primary dwelling. The rental income itself does not inherently disqualify the property for RNRB purposes. ### Does renting out a room affect the RNRB? Renting out a room within a property that was demonstrably the deceased's main residence generally does not affect its eligibility for the RNRB. HMRC guidance focuses on whether the property was the individual's primary home. If the deceased lived in the property as their main residence until passing, the RNRB should still be available. For example, if your mother lived in a £400,000 property, renting out one bedroom, the full £175,000 RNRB (or up to £350,000 for a couple) can still apply, assuming other conditions are met. This is different from a property that was exclusively run as a business or investment, such as a full buy-to-let property, which would not qualify. ### What if the rental arrangement was more substantial? If the rental arrangement was significant, such as multiple rooms rented out making it function more like a guesthouse or a substantial HMO, its eligibility could become more complex. The question would then be whether the property maintained its character as a 'home' for the deceased. A property generating significant income from multiple tenants might be viewed differently by HMRC than simply renting out a single spare room. For instance, a property with five unrelated tenants, where the deceased also resided, might be subject to stricter scrutiny regarding its primary use than a single-room lodger scenario. This is because HMRC will assess the 'main residence' status of the property as a whole. ### Considerations for Valuing the Property and RNRB The RNRB is available against the value of the home, up to the individual allowance. The value of the property for Inheritance Tax (IHT) purposes is its open market value at the date of death. Any rental income generated is not directly included in this valuation, but the fact of a room being rented might influence what a willing buyer would pay, potentially slightly reducing the overall market value if the tenancy was problematic. However, the total value of the property (e.g., £300,000) that passes to a direct descendant will be considered for the RNRB, not just a pro-rata share. You would still benefit from the £175,000 RNRB, potentially reducing the taxable estate from £300,000 by that amount, in addition to the standard Nil Rate Band of £325,000. ## Steve's Rule of Thumb When inheriting property where the deceased rented a room, assume RNRB eligibility if it was their clear main residence, but prepare to demonstrate this to HMRC with evidence of occupancy. ## What This Means For You Understanding the nuances of Inheritance Tax and RNRB, particularly with properties that generate income, can be complex. Most individuals don't know the specifics of how HMRC interprets 'main residence' for RNRB purposes. If you want to ensure you are maximising available reliefs and correctly reporting the estate, this is exactly the kind of technical detail we cover and unravel inside Property Legacy Education.

Steven's Take

Inheriting a property with a previously rented room adds a layer of complexity to Inheritance Tax planning, but it's not a showstopper for RNRB. The core principle is whether the property was genuinely your mum's main home. HMRC is looking for bona fide residency, not just whether a commercial activity occurred. For instance, my portfolio includes properties where careful structuring is essential to ensure tax efficiency. Always focus on the facts of habitation and be prepared to articulate them clearly.

What You Can Do Next

Gather Evidence of Residency: Collect utility bills, council tax statements, and electoral roll registrations to unequivocally prove the property was your mother's main residence. This supports the 'main residence' criterion for HMRC.
Review Rental Agreements: Locate any tenancy or lodger agreements. Understand the terms, particularly if it was a licenced HMO or a simple lodger agreement, as this helps clarify the property's use. Consult HMRC's guidance on 'rent a room scheme' for context.
Consult an Inheritance Tax Specialist: Engage an experienced inheritance tax accountant or solicitor (search 'inheritance tax adviser' on SRA.org.uk or ICAEW.com). They can review the specific circumstances and advise on RNRB eligibility and IHT calculations.

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