UK Self Assessment tax return, filed and MTD-ready
If you have UK income outside PAYE — foreign income, rental profit, self-employment or gains — HMRC wants a Self Assessment tax return. We prepare it correctly, coordinate it with your US return, and get you ready for Making Tax Digital for Income Tax as it phases in.
Your UK return, page by page
The pages a US-connected filer most often needs, and what each one does.
- SA100Your main Self Assessment return, filed once your income falls outside PAYE.
- SA106The foreign pages — foreign income, dividends and gains, and foreign tax credit relief.
- SA109The residence and remittance pages, where your UK status is set out.
- SA105UK property pages, for rental profit from a UK let.
- MTD ITSADigital records and quarterly updates, phasing in by income level.
What clients say about their UK returns
I live in Brighton and still own a small rental flat in Ohio. Taxule completed my SA100 with the SA106 foreign pages, claimed foreign tax credit relief for the US tax on the rent and made sure the figures matched my US return. It was filed in December, well ahead of the 31 January deadline.
My UK lettings and freelance design work together take me over £50,000, so Making Tax Digital applied to me from April 2026. They moved my records onto compatible software, explained how the quarterly updates work and had everything running before my first update was due.
I arrived from New York partway through the tax year and had no idea whether I was UK resident. The team worked through the residence test with me, completed the SA109 pages and claimed split year treatment, so only my time in the UK was taxed here.
Who this service is for
US citizens living in the UK
Based here but still owe HMRC a Self Assessment return whenever income falls outside PAYE — foreign income, rental profit, self-employment or gains.
UK residents with US income
US dividends, US rental property or other US-source income that also needs reporting correctly on the UK side.
US-UK cross-border taxpayers
Income, accounts or gains that touch both countries at once, where the UK and US returns need to be prepared together.
Americans moving to or from the UK
A relocation mid-tax-year, where residence status, split-year treatment and what needs filing aren't always obvious.
Also need your US return? We prepare both together. See Dual filing & treaty relief.
When does MTD for Income Tax reach you?
MTD ITSA is phasing in by qualifying income. Pick a band to see where you stand — an illustration, not advice.
MTD ITSA — the phase-in, by qualifying income
Qualifying income is your gross self-employment and property income before expenses. Choose the band that fits.
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—What's included in your UK return
You get a written scope first, listing each page we'll prepare for you.
| Page or task | What it covers | When you need it |
|---|---|---|
| SA100 | Your main Self Assessment return | Once income falls outside PAYE |
| SA106 (foreign) | Foreign income, dividends, gains and foreign tax credit relief | If you have foreign income or gains |
| SA109 (residence) | Residence, remittance and split-year treatment | In your arrival or departure year, or on the remittance basis |
| SA105 (property) | UK rental profit and allowable expenses | If you let a UK property |
| MTD readiness | Digital records, software and quarterly-update setup | As MTD ITSA phases in for you |
| US coordination | Your UK return checked against your US position | If you also file in the US |
How UK Self Assessment works for a US-connected filer
The rules that decide what you file, when, and how it lines up with your US return.
PAYE doesn't always cover you
Foreign income, higher income, rental profit, self-employment or capital gains can each trigger a Self Assessment return even if you're taxed through PAYE.
The foreign pages: SA106
Foreign income, dividends and gains go on the SA106 foreign pages, with foreign tax credit relief claimed for tax already paid abroad.
Residence and the SA109
Your UK residence under the Statutory Residence Test, remittance basis and split-year treatment are all set out on the SA109.
The 31 January deadline
Online returns and any tax owed are due by 31 January, with a second payment on account on 31 July. We file well ahead so it's never a scramble.
Payments on account
HMRC asks for two advance payments toward next year's bill. We calculate them, and reduce them where your income has genuinely fallen.
Keeping both sides consistent
Your UK figures feed your US return, so credits are claimed in the right direction and the same income isn't taxed twice.
Why Taxule for your UK return
One team prepares your UK and US tax together, so both sides agree before anything is filed.
Both sides, one team
Your Self Assessment is prepared alongside your US return, so the numbers and the treaty positions match.
Ready for MTD
We set your records and software up for Making Tax Digital before it becomes mandatory for you.
Every page scoped clearly
Every page we'll prepare is explained clearly in your scope before we start.
How your UK return works with us
- 1
Review your sources
We work out everything HMRC needs to see and confirm whether a return is actually required.
- 2
Prepare the return
The right pages, the right treatment for cross-border income, checked against your US position.
- 3
File & get MTD-ready
We file on time and set your records up for Making Tax Digital before it reaches you.
UK Self Assessment questions from Americans in the UK
Straight answers to what US-connected filers ask most about their UK return.
Do I need to file a UK Self Assessment tax return?
Sometimes — even under PAYE. Foreign income, higher income, UK rental profit, self-employment or capital gains can each trigger a Self Assessment return. We'll confirm whether you actually need to file before any work begins.
When is the UK Self Assessment deadline?
Online returns and any tax owed are due by 31 January following the end of the tax year, with a second payment on account due 31 July. We file well ahead of the deadline.
Do I need to declare foreign income on my UK return?
Usually yes, if you're UK resident — foreign income, dividends and gains go on the SA106 foreign pages, with residence and remittance handled on SA109. We make sure it's reported correctly and not taxed twice.
What is Making Tax Digital for Income Tax (MTD ITSA)?
MTD ITSA is HMRC's move to digital records and quarterly updates for some sole traders and landlords, phasing in by income level. We'll tell you if and when it applies to you and get your records ready.
Can you handle both my UK and US returns?
Yes — that coordination is the whole point. Our dual filing & treaty relief service keeps the two returns consistent so the same income isn't taxed twice.
