Self Assessment & MTD Income Tax
Self assessment software that files every form to HMRC
From the SA100 main return to every supplementary page — employment, self-employment, partnership, property, foreign income, trusts, capital gains, residence — and the new MTD for Income Tax quarterly updates, end-of-period statement, and final declaration. AccLedger files them all, directly to HMRC.
HMRC-recognised · 90-day free trial · From £7.50/month for sole traders
SA100 main return
The headline self assessment return covering interest, dividends, UK pensions, gift aid, blind person's allowance, and the rest. AccLedger pre-fills from your bookkeeping, you review, sign and submit.
MTD Income Tax — quarterly updates
Required from April 2026 for sole traders and landlords above £50,000. AccLedger compiles each quarterly update from your live records and submits to HMRC five business days before the deadline.
EOPS & final declaration
Under MTD ITSA, the year ends with an end-of-period statement to confirm each business, and a final declaration that wraps in employment, dividends, savings and pensions. AccLedger walks you through both.
Every supplementary form supported
SA102 (employment), SA103 (self-employment), SA104 (partnership), SA105 (UK property), SA106 (foreign), SA107 (trusts), SA108 (capital gains) and SA109 (residence) — all available, all filed.
Real-time tax estimate
See your projected income tax and NIC liability after every transaction. Tax bands, personal allowance taper, and reliefs applied automatically — no January surprises.
Invite your accountant
Add your accountant to AccLedger at no extra cost. They can review and approve every supplementary form, every quarterly update, and the final declaration before submission.
All SA100 supplementary forms supported
AccLedger covers the full SA100 family of returns. Pick the supplementary pages that apply, fill in or auto-populate the figures from your books, and submit everything together — or save and come back.
- SA100 — main self assessment return
- SA102 — Employment (one page per employer, full benefits and expenses schedule)
- SA103 — Self-employment (short and full versions)
- SA104 — Partnership share
- SA105 — UK property income
- SA106 — Foreign income, dividends, pensions and tax credit relief
- SA107 — Trusts, settlements and estates
- SA108 — Capital gains summary with full computation attachment
- SA109 — Residence, remittance basis and domicile
- Plus pensions, gift aid, blind person's allowance and additional information
MTD for Income Tax — quarterly to final declaration
Making Tax Digital for Income Tax replaces the old "one return in January" rhythm with quarterly updates, an end-of-period statement per business, and a single final declaration. AccLedger orchestrates every step.
- Quarterly updates submitted from your live ledgers (one per business)
- EOPS confirms the figures for each sole trade or property business
- Final declaration combines all sources (employment, dividends, savings, pensions)
- Submission receipts retrievable from HMRC, audit-grade history retained
- Mandatory wave: April 2026 (£50k+), April 2027 (£30k+), April 2028 (£20k+)
Built for the way real lives are taxed
Most people on self assessment are not just one thing. AccLedger handles the messy real-world combinations — a director who is also a freelancer who also rents out a flat — without forcing you to pick a single template.
- Multiple sole trades and rental properties on one return
- Director of a limited company drawing salary + dividends
- CIS deductions tracked through the year and claimed on SA103
- Mileage, use-of-home and simplified expenses included
- Foreign income, foreign dividends and FTCR support
Landlords, capital gains, and residence — fully covered
Whether you have one buy-to-let or a portfolio, sold a second property, or have a residence question, AccLedger's self assessment flow has the right form, the right calculation, and the right schedule.
- SA105: per-property income and expenses, with UK and overseas split
- Mortgage interest restriction for higher-rate landlords applied automatically
- SA108: capital gains computation per disposal, with annual exempt amount
- SA106: foreign property income, foreign dividends, foreign tax credit relief
- SA109: residence, remittance basis and domicile elections
One submission flow, two HMRC eras
For tax years before MTD ITSA mandate hits you, AccLedger files the legacy SA100 with all supplementary pages. Once MTD applies, the same data flows through quarterly updates and a final declaration. Your bookkeeping does not change — just the way HMRC receives it.
- Legacy SA100 submission (annual) for years pre-MTD
- MTD ITSA quarterly + EOPS + final declaration for years post-mandate
- Same chart of accounts, same bank feeds, same reports — different submission cadence
- AccLedger automatically uses the correct path for each tax year
Frequently asked questions
Which self assessment forms can AccLedger file?
Is AccLedger HMRC-recognised for self assessment?
How does MTD for Income Tax change things?
I have several sources of income — can AccLedger handle that?
Can I file capital gains on the same return?
What about residence and the remittance basis?
Does AccLedger pre-fill from my bookkeeping?
Can my accountant submit on my behalf?
What happens after I submit?
Can I file late returns or amend a previous year?
File your full self assessment with AccLedger
Every form, every supplementary, every MTD ITSA milestone — to HMRC, in one place. Free for 90 days, no card.
HMRC-recognised · 90-day free trial · From £7.50/month for sole traders