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MTD for Income Tax: Plan the Quarterly Workload

Get ahead of quarterly updates before they become mandatory.

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Quick answer

MTD for Income Tax becomes mandatory from April 2026 for qualifying income over £50,000, replacing one annual return with four quarterly updates per client plus a final declaration. Planning the workload now — client lists, recurring quarterly tasks and reminders — avoids a repeat of the January scramble, four times a year.

What is MTD for Income Tax workload planning and why does it matter for UK practices?

It means mapping which clients fall into scope, setting up the quarterly cadence now, and building the recurring task structure before the mandatory start date, rather than reacting once quarterly updates are already due.

From April 2026, MTD for Income Tax Self Assessment becomes mandatory for individuals with qualifying income over £50,000, requiring quarterly updates through compatible software rather than a single annual Self Assessment return. [VERIFY] current HMRC thresholds and phased rollout dates, as later phases may extend to lower income bands.

This is a workload planning issue, not just a software compliance one: a practice that manages 300 clients quarterly rather than annually is handling roughly four times the number of touchpoints, spread across the year rather than concentrated in January.

Remindoo does not perform MTD submissions or file with HMRC's API — this page is about planning the operational workload around the quarterly cycle, which sits alongside whatever MTD-compatible software your clients or your firm use for the actual submission.

Why is MTD ITSA workload planning being left too late?

Firms are treating it as a software swap, not a workload change

Choosing MTD-compatible software solves the filing mechanism but doesn't address the fact that chasing and processing now happens four times a year instead of once.

No clear list of who's in scope

Without checking client income levels against the threshold now, firms won't know their real quarterly workload until it's already mandatory.

Quarterly chasing needs a different rhythm

The annual chase-in-January habit doesn't map onto four smaller, more frequent deadlines spread through the year.

Client education hasn't started

Clients used to one annual conversation with their accountant will need to understand and engage with a new quarterly cycle.

Staff capacity assumptions are still built around January

Resourcing plans built around one annual peak will need rethinking once the workload spreads more evenly, but with added frequency.

What does leaving MTD ITSA preparation too late cost a practice?

Firms that wait until the mandatory date to plan risk a compressed scramble to identify in-scope clients, agree new engagement terms and build a quarterly process, all at once, rather than spreading that work over the run-up period.

Beyond any HMRC penalties for late quarterly updates once mandatory, [VERIFY] current penalty structure for MTD ITSA, the bigger practical risk is a firm trying to build an entirely new quarterly workflow for hundreds of clients in the weeks before the deadline, rather than testing it in advance.

Firms that haven't identified their in-scope clients risk under-pricing the extra quarterly work if it's not built into fee agreements ahead of time.

How do you plan for MTD ITSA workload? Step by step

  1. 1

    Identify clients likely to be in scope

    Review client income levels against the qualifying threshold now, so you know the real size of your quarterly workload ahead of the mandatory date.

  2. 2

    Agree updated engagement terms and pricing

    Reflect the extra quarterly work in fees and engagement letters before the change takes effect, not after clients are already used to the old price.

  3. 3

    Set up a quarterly recurring task structure

    Build the quarterly update as a repeating task per in-scope client, rather than treating each quarter as a one-off.

  4. 4

    Educate clients on the new cadence early

    Explain what's changing and what they'll need to provide each quarter well before the first deadline lands.

  5. 5

    Test the workflow with a small client group first

    Run the quarterly process with early-adopting or lower-risk clients before rolling it out across the full in-scope client base.

  6. 6

    Rebuild capacity planning around four smaller peaks

    Adjust staffing expectations from one annual crunch to four recurring quarterly windows, which may need different resourcing.

How does Remindoo help with MTD for Income Tax workload planning?

Remindoo helps you plan the operational side of MTD ITSA before it becomes mandatory: recurring tasks can be set to a quarterly cycle per client, so the update workflow regenerates automatically rather than being rebuilt each quarter. Custom fields let you flag which clients are in scope based on income thresholds, so you can filter your client base and see the real size of the quarterly workload ahead of time. Trigger dates and task breakdown help you plan capacity around four recurring quarterly windows instead of one annual peak, and automated reminders keep both your team and clients on track for each submission window. This does not perform MTD submissions to HMRC — that requires MTD-compatible software for the filing itself — but it keeps the quarterly workload planned, assigned and visible well before April 2026, free to try for 60 days.

Spreadsheets vs Remindoo: what changes?

AreaSpreadsheets & emailWith Remindoo
Identifying in-scope clientsNot yet reviewedFlagged with custom fields
Update cadenceAnnual habitQuarterly recurring tasks
Capacity planningBuilt around one January peakFour planned quarterly windows
Client communicationNot yet startedReminders ahead of each deadline
Fee structureUnchanged from annual pricingReviewed for quarterly workload

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When does MTD for Income Tax actually become mandatory?

Mandatory from April 2026 for those with qualifying income over £50,000, with further phases expected to bring in lower income bands later.

[VERIFY] current HMRC guidance for the exact phased thresholds and dates, as later tranches below £50,000 have been signalled but should be confirmed against the latest published timetable before advising clients.

“Automated reminders and task templates save countless hours each week.”
Shaz Israr, Director, BNW Accountants

Frequently asked questions

Does Remindoo submit MTD for Income Tax updates to HMRC?

No. Remindoo does not perform HMRC submissions or connect to HMRC's API — it helps plan and track the quarterly workflow, while the actual submission needs MTD-compatible software.

From when is MTD for Income Tax mandatory?

From April 2026 for individuals with qualifying income over £50,000. [VERIFY] current HMRC guidance for later phases and any threshold changes before advising clients.

How do I know which of my clients will be affected?

Review self-employment and property income levels against the qualifying threshold; custom fields let you flag and filter in-scope clients once you've assessed them.

Can I set up quarterly recurring tasks now, ahead of the mandatory date?

Yes, recurring tasks can be configured on a quarterly cycle at any time, so you can test the workflow with clients before it becomes compulsory.

Will this replace my Self Assessment process entirely?

For in-scope clients, quarterly updates plus a final declaration replace the single annual return; other clients below the threshold continue with standard Self Assessment for now.

Is the 60-day free trial enough to test a quarterly workflow?

It covers one quarter's cycle for testing purposes, which is enough to validate the recurring task structure before rolling it out to your full in-scope client base.

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Sources

Comparing options? Read our guide to practice management software for small accounting firms.

Last updated: . General guidance, not regulatory advice. Check with your professional body.

Why recording every task matters in an accountancy practice

Accounting firms run on deadlines: VAT returns, payroll, confirmation statements, accounts and Self Assessment. Recording every job as a task, with an owner and a date, is the simplest way to make sure nothing is missed.

Avoid penalties

HMRC and Companies House charge penalties for late filing. A task for every deadline, with an internal date before it, gives the team a buffer.

Nothing depends on memory

Recorded tasks mean work continues when someone is off sick, on leave or has left the firm.

Consistent quality

Subtask checklists make every job follow the same steps and reviews, whoever does the work.

Visibility for managers

Filters by owner, status and deadline show at a glance what is late, what is due and who needs help.

Practical tips from UK practice

  • Set an internal deadline two to four weeks before every statutory deadline.
  • Use recurring tasks for repeat work such as VAT, payroll and bookkeeping.
  • Break larger jobs into subtasks, including a review step.
  • Comment on the task instead of by email, so the history stays with the work.

Written and reviewed by Waqas Sagar ACA FCCA FMAAT, Chartered Accountant with 18+ years in practice. Founder and MD of Accotax, an ICAEW, ACCA and AAT regulated London practice that has served over 5,000 clients, and founder of Remindoo. Guidance is general; check current GOV.UK and professional body guidance for your firm.

What UK practices say about Remindoo

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Taxaccolega Chartered Accountants
“During my trial, the team were absolutely amazing. They helped onboard my clients, set up my settings and made sure everything was ready for me to use… they made the whole process completely stress-free.”
Afia Begum
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Premier Books Consultancy Ltd

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