What MTD for Income Tax Changes for UK Sole Traders and Landlords

Making Tax Digital for Income Tax Self Assessment (MTD ITSA) is the biggest change to UK self-assessment since the system was introduced. Instead of one annual SA100 tax return, affected taxpayers must submit quarterly digital updates to HMRC showing their income and expenses for each three-month period, followed by a year-end final declaration.

The rollout timeline:

PhaseWho it applies toFrom
Phase 1Sole traders and landlords with total qualifying income over £50,000April 2026
Phase 2Sole traders and landlords with total qualifying income over £30,000April 2027
Phase 3Those with income over £20,000 — dates to be confirmedTBC
PartnershipsGeneral partnerships — dates not yet setTBC

"Total qualifying income" includes self-employment turnover and property rental income combined. A consultant earning £35,000 from freelancing plus £20,000 from a rental property (£55,000 total) falls into Phase 1 from April 2026.

Penalty regime changes: MTD ITSA introduces a new points-based penalty system for late quarterly submissions. Each missed submission adds a penalty point. Once a threshold is reached, a £200 penalty applies — and it applies per missed submission thereafter. The old one-off £100 late filing penalty is replaced with a system designed to catch persistent non-filers earlier.

What an Indian CA Firm Does Under MTD ITSA

The quarterly submission requirement creates a structured workload that suits an outsourced bookkeeping arrangement. Rather than sending everything to an accountant once a year in January, the work is spread across four quarterly cycles — which matches how an Indian CA team operates month-to-month.

MTD ITSA TaskIndian CA TeamUK Side (you or UK agent)
Monthly transaction codingCodes all income and expenses in Xero/QuickBooks each monthNot required
Bank reconciliationReconciles all accounts monthlyNot required
Quarterly income summary preparationCompiles quarterly income and expense totals per HMRC categoriesReviews and approves
Quarterly HMRC submissionPrepares submission data; submits if UK agent authorisedSubmits via MTD software if not delegated
Year-end final declaration preparationCompiles all adjustments, allowances, reliefsReviews, submits final declaration
Tax liability estimateProvided quarterly so no January shockNot required
Mileage, home working, capital allowancesApplied correctly each quarterProvides supporting information

How the Quarterly Submission Works in Practice

Each quarter under MTD ITSA covers a fixed three-month period ending on 5 April, 5 July, 5 October, or 5 January. The submission deadline is one month after the quarter end — so the April quarter is due by 5 May.

The practical flow with an Indian CA team:

  1. Monthly: Your Indian team codes transactions in Xero or QuickBooks — income, expenses, mileage claims, receipts. Bank feeds pull transactions automatically; the team reviews and categorises each one.
  2. End of quarter: Your team compiles the quarterly summary — total income by category, total expenses by category, in the format HMRC requires for MTD ITSA submissions.
  3. Review: You review the summary. Takes 15–20 minutes for most sole traders.
  4. Submission: Either you submit directly via your MTD-compatible software (one click once the data is in), or your UK tax agent submits on your behalf, or — if your Indian firm has UK tax agent registration — they submit directly.
  5. Tax estimate: Your team provides a running estimate of your tax liability so you can plan your payments on account.

Software Requirements for MTD ITSA

HMRC requires MTD-compatible software for all quarterly submissions. The main options your Indian team can work within:

SoftwareMTD ITSA ReadyBest ForMonthly Cost (approx)
XeroYesSole traders with employees, VAT-registered businesses£16–£33/month
QuickBooks Self-EmployedYesSimple sole traders, mileage tracking£10–£20/month
QuickBooks OnlineYesGrowing businesses, multiple income streams£14–£35/month
FreeAgentYesFreelancers and contractors£19/month (free with NatWest/RBS)
Sage AccountingYesEstablished businesses already on Sage£15–£30/month

Your Indian CA team accesses the software via the adviser/accountant invitation — the same model used for MTD VAT. You remain the account owner with full admin control. Your team gets the access level needed to code transactions and prepare submissions.

MTD ITSA for Landlords — Property Income Specifics

Landlords face additional complexity under MTD ITSA because property income and self-employment income must be reported separately, even in the same quarterly submission. A landlord with two rental properties and a consulting income stream must track three separate income sources.

What an Indian CA team handles for landlords:

  • Separate tracking of rental income per property
  • Allowable expenses: mortgage interest (Section 24 restriction applies), letting agent fees, repairs and maintenance, insurance, ground rent, service charges
  • Wear and tear allowance vs replacement of domestic items relief — correctly categorised
  • Void period expense tracking
  • Capital expenditure vs revenue expenditure distinction
  • Quarterly income summaries split by property business vs self-employment (if applicable)
  • Year-end rental income statement for mortgage lenders on request
Section 24 mortgage interest restriction: Since April 2020, landlords cannot deduct mortgage interest as a business expense. Instead, a basic rate (20%) tax credit applies on finance costs. This is frequently mis-applied by non-specialist bookkeepers, resulting in understated tax. An Indian CA team experienced with UK landlord accounts applies this correctly from the start.

Cost: UK Accountant vs Indian CA Firm for MTD ITSA Bookkeeping

ScopeUK Accountant / BookkeeperIndian CA FirmAnnual Saving
Simple sole trader (1 income stream, no VAT)£150–£250/month£60–£100/month£1,080–£1,800
Sole trader with VAT and employees (up to 5)£250–£400/month£100–£160/month£1,800–£2,880
Landlord (1–3 properties, no self-employment)£150–£300/month£60–£120/month£1,080–£2,160
Landlord + sole trader combined MTD submission£300–£500/month£120–£200/month£2,160–£3,600

For UK sole traders and landlords currently paying a UK accountant for annual self assessment, switching to a monthly Indian CA team for MTD-ready bookkeeping typically saves £1,000–£3,600 per year while providing better visibility through monthly accounts rather than one annual scramble.

The quarterly deadline structure means your books are always current — something that rarely happens under the old annual model where most clients hand everything over in November and December. Our bookkeeping service is structured for this kind of ongoing monthly engagement.

About This Article
Written by Sharma Jyoti, CA (ICAI) — Founder, Sharma Jyoti and Co. We are an ICAI-registered Chartered Accountant firm providing outsourced bookkeeping and accounting services to Australian, US, UK and Canadian businesses. Our team includes Xero Advisor Certified professionals (Certificate #17207818). Learn more about our firm →
Related Reading
Making Tax Digital for VAT — outsourcing guideMTD VAT already live — how Indian CA firms handle it How to set up Xero access for your Indian bookkeeperStep-by-step: adviser invite, permissions, MTD submission UK HMRC compliance when using an Indian bookkeeperWhat HMRC expects — your obligations vs your bookkeeper's How much does a bookkeeper cost per hour in the UK?UK vs India rate comparison — monthly cost by business size

Frequently Asked Questions

MTD ITSA replaces the annual SA100 Self Assessment return with quarterly digital submissions. It applies from April 2026 to sole traders and landlords with income over £50,000, and from April 2027 to those with income over £30,000. Each quarter you submit a summary of income and expenses through MTD-compatible software. A year-end final declaration replaces the traditional tax return.
An Indian CA firm prepares all quarterly income and expense summaries. HMRC submission goes through MTD-compatible software — either by you (one click once data is prepared), your UK tax agent, or your Indian firm if they hold UK tax agent registration. The preparation work — monthly coding, reconciliation, quarterly summary compilation — is all done in India.
HMRC requires MTD-compatible software: Xero, QuickBooks (Online or Self-Employed), FreeAgent, or Sage Accounting are the main options. Your Indian CA team works within whichever you use — they access it via an adviser invitation. You retain admin control. Submission is made through the software's MTD feature — either by you or your tax agent.
Indian CA firms charge £60–£160 per month for MTD-ready bookkeeping, depending on complexity — sole trader, landlord, or combined. UK accountants charge £150–£500 per month for the same scope. Annual saving: typically £1,000–£3,600 depending on how complex your income mix is.
The SA100 annual return is replaced by a final declaration under MTD ITSA. After submitting four quarterly updates, you submit a year-end final declaration confirming total income, allowances, and adjustments. Your Indian CA firm prepares the final declaration data. You or your UK tax agent submit it via MTD-compatible software by 31 January following the tax year.