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MTD ITSA · 2026/27 · Q2 update due 7 Nov 2026

Quarterly income tax, drafted from your ledger , not your nerves.

From April 2026, anyone with self-employment or property income over £50,000 files four quarterly updates plus a Final Declaration through MTD. ac-co totals each category from your live bank and books, keeps the cumulative position straight, estimates the tax as you go — and files every update for you.

See the quarterly flow
No card · UK-only · HMRC-recognised
BUILT FORSole tradersLandlordsSide hustles + PAYEMultiple tradesOver the £50k threshold
Live · click to watch
Wired into
HMRC · MTD ITSA APIOpen Banking · every UK bankXero · booksQuickBooks · booksac-co.landlord · property ledgerReceipts · inbox + photos
0
submissions a year, handled
4 quarterly updates + Final Declaration
0%
of categories totalled automatically
income & expenses, mapped to HMRC
0
income sources in one place
self-employment + property, side by side
£0k
threshold for April 2026
£30k from 2027 · £20k from 2028
HOW IT WORKS

From connected to filed, in four moves.

01

Connect

Link your bank, your books and any property ledger. ac-co reads the quarter's income and expenses, read-only.

02

Categorise

Every transaction is mapped to the right HMRC category for self-employment and property — automatically.

03

Cumulate

Each quarter is cross-checked against the ones before it, and the tax-to-date estimate is updated.

04

File

Review on your phone and submit the quarterly update. The Final Declaration squares it all up after year-end.

QUARTERLY UPDATES

Four updates a year, drafted in minutes , not weekends.

Each quarter, ac-co totals your income and expenses by category — for every trade and every property — and submits the update. No retyping, no spreadsheet, no last-minute scramble.

  • Self-employmentTurnover and expenses by HMRC category, straight from your bank and books.
  • UK propertyRent and allowable costs per property; finance-cost relief tracked for the Final Declaration.
  • Standard quarters6 Apr–5 Jul, 6 Jul–5 Oct, 6 Oct–5 Jan, 6 Jan–5 Apr — or calendar-quarter dates if you prefer.
  • One tap to submitReview the totals, check the sources, and send the update straight to HMRC.
ITSA · 2026/27 · Quarter 2
Drafting from live data
HMRC connected
SE.incTrade income — this quarter£24,800
SE.cogsMaterials & stock−£8,200
SE.carVehicle & travel−£1,640
SE.toolTools & equipment−£1,180
SE.admAdmin, phone & insurance−£940
+ 4 more boxes · 4 pages
reconciling…
CUMULATIVE POSITION

Always know where you stand on tax.

MTD updates are cumulative — each one restates the year so far. ac-co keeps the running totals straight, cross-checks every quarter against the last, and shows a live estimate of the tax and NIC you'll owe.

  • Running totalsYear-to-date income and expenses, restated cleanly at every quarter.
  • Tax-to-date estimateA live projection of Income Tax and Class 4 NIC, so the January bill is never a shock.
  • Quarter-on-quarter checksUnusual swings between quarters are flagged before you submit.
  • Set money asideWe suggest how much to put by each quarter so the final bill is already covered.
ITSA computation
Self-employment profit — YTD£41,300
add Property profit — YTD£8,620
Total profit — year to date£49,920
Estimated Income Tax — to date£7,480
Estimated Class 4 NIC — to date£1,990
less Finance-cost reducer (20%)−£720
Estimated tax & NIC to date£8,750
FINAL DECLARATION

One declaration to finish the year — reliefs and all.

After the fourth quarter, the Final Declaration pulls everything together — adds any other income, applies allowances and reliefs, and replaces the old Self Assessment return. ac-co drafts it from the quarters you've already filed.

  • Replaces SA100The Final Declaration is the new year-end return — built from your four quarterly updates.
  • Other incomeDividends, interest, capital gains and PAYE folded in, each on the right page.
  • Reliefs appliedPersonal allowance, pension relief, Gift Aid and the property finance-cost reducer.
  • Cross-files cleanlyAlready on ac-co.self-assessment or ac-co.landlord? It all flows through to here.
Pre-submission checks
✓Every transaction mapped to an HMRC category
✓Q2 cumulative totals reconcile against Q1
✓Property finance costs ring-fenced for the reducer
✓Trade expenses within expected range vs Q1
✓No personal spending mis-categorised as business
!Use-of-home allowance not yet claimed
SEE IT END TO END

Watch a whole ITSA file itself — connect, draft, compute, check, submit.

A real return, start to finish, in about ninety seconds. Six steps, every figure traced to its source, ending in an HMRC acceptance receipt.

01Connect02Draft03Documents04Compute05Check06Submit
PRICING

A little each quarter — or one fee a year.

Pay per quarterly update, or one flat fee for the whole year including the Final Declaration.

Quarterly
One income source
£9/ quarter

One trade or one property, four updates a year. Totalled from your bank and filed.

Start a quarter
  • ✓4 quarterly updates / year
  • ✓One income source
  • ✓HMRC category mapping
  • ✓Tax-to-date estimate
  • ✓MTD ITSA submission
Full year
Most sole traders & landlords
Most picked
£99/ year

Every quarter plus the Final Declaration, across all your trades and properties — drafted and filed.

Start your year
  • ✓Everything in Quarterly, plus:
  • ✓Self-employment + property together
  • ✓Final Declaration (replaces SA100)
  • ✓Section 24 + reliefs
  • ✓Set-aside planning
  • ✓Priority human review add-on
Accountant
Firms & multi-client
Custom

For practices managing MTD ITSA at volume — bulk onboarding, a review queue and white-label.

Talk to us
  • ✓Multi-client console
  • ✓Bulk Open Banking onboarding
  • ✓Quarterly review queue
  • ✓Agent services account
  • ✓API + export
TRUST

We file in your name, so we hold ourselves to the highest bar.

ac-co is HMRC-recognised software submitting through the official API. Connections to your bank and books are read-only. Every figure traces to a source, and every receipt is stored for six years.

HMRC
recognised
UK GDPR
data resident in London
Open Banking
read-only
Read-only
default access
Human-in-loop
you tap to file
OAuth 2.1
scoped tokens
FAQ

Questions people actually ask.

From 6 April 2026, anyone with combined self-employment and property income over £50,000 must keep digital records and file four quarterly updates plus a Final Declaration. The £30,000 threshold follows in April 2027 and £20,000 in April 2028. ac-co is HMRC-recognised for MTD ITSA.

No — they're running totals of income and expenses for the year so far. They're cumulative, so each one restates the year to date. The Final Declaration after year-end is where reliefs and other income are added and the tax is settled.

For income within MTD, yes — the Final Declaration replaces the old SA100 return. If you also have income outside MTD (dividends, capital gains, PAYE), that's folded into the Final Declaration too. ac-co handles the whole picture.

Each quarter is cross-checked against the ones before it, so corrections flow through cleanly and you can't double-count. We also show a live estimate of the tax and NIC you'll owe, and suggest how much to set aside.

Then you're ahead — your property ledger and prior return flow straight into your MTD ITSA quarters. Nothing to re-enter.

A flat annual fee covering all four quarters and the Final Declaration, or pay per quarter. No per-transaction charges. See pricing above.

GET AHEAD OF APRIL 2026

Don't fear the four quarters. Let them draft themselves.

UK MTD for Income Tax · 2026/27 · HMRC-recognised · pay per quarter or yearly.

First quarterly updates fall due from August 2026 — most beta updates filed in under 8 minutes
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