Letting your home when you move abroad

Kept homes make accidental landlords, and accidental landlords make predictable mistakes — not because any single rule is hard, but because a dozen small obligations arrive in the wrong order while you're packing a container. Here is the whole sequence, in the order that costs the least.

Before you fly

• Lender and insurer first. Consent to let (or a buy-to-let remortgage) and proper landlord insurance. Letting on a residential mortgage without consent is a breach that surfaces at the worst moments — claims and refinancing.
• Decide who owns what — now. Spouses are taxed 50/50 on jointly-owned rent by default. If one of you won't work abroad, shifting beneficial ownership toward the non-earner before departure (with a Form 17 election where shares are unequal) can put most of the profit inside their unused personal allowance — turning the annual bill into roughly nothing, legally and permanently. This is a solicitor-and-form exercise that is cheap before you leave and awkward from 7,000 miles away.
• The compliance kit: EPC rated E or better, gas safety certificate, EICR electrical report, smoke and CO alarms, deposit protection scheme, right-to-rent checks. An agent on full management handles all of it, which is why 12% stops looking expensive the day you're nine hours behind UK time.
• Photograph and value the house. A dated condition record and a market valuation as it becomes a rental — cheap now, valuable later for both deposit disputes and the eventual capital gains computation.

When the tenancy starts

• NRL1 to HMRC — the form that stops your agent legally deducting 20% of the rent at source. One per owner. The full guide to the scheme is here; the short version is: apply before the first rent day.
• Register for Self Assessment (each owner), and tell HMRC your overseas address — penalty letters default to your last known UK address, which is now your tenant's kitchen table.
• Start the shoebox: agent statements, invoices, insurance schedules, mortgage interest certificates. The return is only as good as this pile.

Every year after

One return per owner: rent minus agent fees, repairs, insurance, service charges; mortgage interest as a 20% credit; the personal allowance claimed where nationality or treaty supports it; the SA109 residence pages that HMRC's own website cannot file. If you live somewhere that also taxes the rent — Australia, Canada, Spain, Ireland, the US — the local return credits the UK tax, provided the UK computation exists on time. Details that earn their keep:

• Void periods: costs while the property is genuinely available to let (council tax, utilities, insurance between tenants) remain claimable.
• Pre-letting costs reach back up to seven years where they'd otherwise qualify — the safety certificates and repairs before tenant one count.
• Repairs versus improvements: replacing the boiler is a repair (claim now); adding an extension is capital (wait for the sale). The photographs from before you left settle a surprising number of these.
• Loss years still get filed — losses carry forward only if claimed, and quiet years are when HMRC's nudge letters to overseas landlords arrive.

When you eventually sell — or move back

• Selling as a non-resident: the 60-day return, even at nil, with rebasing to 2015 typically shrinking long-held gains dramatically. Private residence relief still covers your years of occupation plus the final nine months.
• Moving back in first: the letting ends (final returns, losses preserved), residence resumes, and a later sale as a UK resident runs under ordinary CGT with PRR covering both stints of occupation. Depending on numbers and timing, return-then-sell can beat sell-from-abroad — it is a genuine planning decision, worth an hour with the numbers a year before you instruct an agent, not a default.

The expat landlord's calendar

When	What	Cost of skipping it
Before the flight	Consent to let, landlord insurance, safety certificates, ownership rebalancing, condition photos	Claims refused; an allowance wasted every year
Tenancy start	NRL1 per owner; SA registration; address updated with HMRC	20% off every rent payment; penalty post to your tenant
Every 31 January	Return per owner with SA109, expenses, allowance claim	£100+ penalties even at nil; credits unclaimed
On renewal/re-let	Gas annually; EICR 5-yearly; deposit re-protected if scheme changes	Deposit penalties of 1–3×; possession routes blocked
At sale	60-day return (even at nil), 2015 rebasing valuation	The penalty ladder; rebasing savings foregone
Considering return	Sell-vs-return sequencing review	The single biggest number on this page, decided by accident

Pin this somewhere. Every row is either an hour of admin done on time or a genuinely annoying sum of money later, and the whole table is exactly what a managing agent plus one accountant's diary covers without you thinking about it from Singapore.

Questions we're asked every week

"The rent barely covers the mortgage — surely there's no tax to think about?"

Cash flow and taxable profit are different animals: only the interest gets relief (as a 20% credit), not the capital repayment. Plenty of break-even-in-cash landlords have taxable profit. Run the numbers before assuming.

"Can we just leave it empty for a couple of years instead?"

You can — no rental tax, but no income, ongoing costs, insurance headaches for empty properties, council tax premiums in many areas, and the accommodation tie keeping your UK day budget tight under the residence test. Empty is rarely the cheap option it feels like.

"Airbnb it when we're not using it?"

Short-letting your own home from abroad multiplies every obligation — planning rules in many cities, different insurance, VAT questions at scale, and the house stays 'available to you', preserving the accommodation tie. It can work; it is not the low-admin path.

The departure review (£249) sequences all of this for your actual dates, and the landlord service (£349/yr) runs it thereafter.