Non-Resident Capital Gains Tax: Why the 2015 Valuation Matters

If you own UK residential property but live overseas, selling the property may trigger Non-Resident Capital Gains Tax (NRCGT). One of the most important elements of this calculation is the property’s value as at April 2015.

This figure is often misunderstood, but getting it wrong can result in paying more tax than necessary or facing questions from HMRC later.

What is Non-Resident Capital Gains Tax?

Since April 2015, non-UK residents have been liable to UK Capital Gains Tax on gains arising from the sale of UK residential property.

In most cases:

• CGT applies to the increase in value, not the full sale price

• Only the gain from April 2015 onwards is taxable

To calculate this correctly, a reliable market valuation at April 2015 is required.

Why April 2015 is critical

April 2015 is known as the rebasing date.

For most non-resident owners, this means:

• the property is treated as if it were valued afresh in April 2015

• only the increase in value since then is subject to CGT

If the April 2015 value is understated, the taxable gain appears larger than it should be.

Market value is not an estimate

For CGT purposes, HMRC requires market value as at April 2015, not:

• a current valuation

• an online estimate

• an estate agent’s appraisal

Market value has a specific meaning under RICS standards. It reflects what the property would reasonably have sold for on the open market at that time, based on evidence from the relevant period.

Estate agent appraisals are typically forward-looking and marketing-led, and are not prepared for retrospective tax purposes.

HMRC scrutiny and risk

The valuation figure is a key input in a Non-Resident CGT return. HMRC may:

• accept a well-supported valuation

• question figures that appear inconsistent

• challenge unsupported assumptions

If a valuation is queried years later, evidence can be difficult to assemble. A professional valuation provides a clear audit trail and significantly reduces risk.

The role of a RICS Red Book valuation

A RICS Red Book valuation:

• is prepared by a Chartered Surveyor

• follows recognised valuation standards

• is suitable for tax reporting

It will:

• value the property as at April 2015

• analyse comparable evidence from the period

• explain assumptions clearly

Importantly, it is backed by professional indemnity insurance, meaning responsibility for the valuation rests with the valuer.

When this matters most

An April 2015 valuation is particularly important where:

• the property was owned long before 2015

• values have risen significantly

• the property is in London or the South East

• condition, lease length or tenancies affected value at the time

In these cases, small valuation differences can translate into large CGT differences.

A proportionate step

For most non-resident owners, a professional valuation is a modest cost relative to:

• the value of the property

• the potential CGT exposure

• the reassurance it provides

It is often the simplest way to ensure the tax position is dealt with correctly and fairly.

Final thoughts

Non-Resident Capital Gains Tax is driven by valuation, not guesswork.

Taking advice on the April 2015 value before submitting a return can make a meaningful difference to both the tax outcome and the overall process.