MTD for Partnerships: Quarterly Updates and Record-Keeping Explained

What this guide covers

This article explains Making Tax Digital (MTD) for Income Tax (ITSA) as it applies to partnerships, focusing on the 2026–2028 rollout, practical quarterly update duties and the record-keeping you must keep to stay compliant. We set out clear steps to prepare, how to choose software and common pitfalls for partners and their appointed agent or accountant.

Quick summary of the 2026–2028 MTD rollout

MTD for Income Tax (ITSA) is being introduced in stages. The key dates you must know are:

• April 2026: businesses and individuals with trading or property income above £50,000 must comply with MTD for ITSA;
• April 2027: the threshold falls to £30,000;
• April 2028: the threshold falls again to £20,000.

If your partnership’s combined qualifying income is above the relevant threshold in each tax year, the partnership must submit quarterly updates under MTD and keep digital records using MTD-compatible software.

Who within a partnership is affected?

A partnership is treated as a single reporting entity for MTD for ITSA. That means the partnership itself must make the quarterly submissions and keep the required digital records. Each partner remains responsible for their personal tax position, but the partnership-level returns and digital records underpin the individual partner calculations.

What constitutes qualifying income for the thresholds?

Qualifying income is trading and property income that forms part of an individual’s or partnership’s self-employed or property rental profits. For partnerships you should look at the partnership’s total qualifying income. If the partnership’s qualifying income exceeds the threshold in the relevant tax year, MTD applies.

Quarterly updates: what they are and what to include

Under MTD for ITSA, partnerships submit four quarterly updates each tax year. These are not full tax returns; they are digital summaries of income and allowed expenses in the period. The updates help HMRC and the partnership track income and tax liabilities in-year, reducing end-of-year surprises.

• Quarterly submissions should show gross income, allowable business and property expenses, capital allowances claimed in the period and adjustments (for example, private use or disallowable costs).
• You will also record partner allocations: the share of profits or losses allocated to each partner in that quarter.
• Each quarterly update must be made using HMRC-approved MTD-compatible commercial software or a bridging solution that meets the API requirements.

Why quarterly updates matter in practice

Quarterly updates keep partners informed about their likely tax bill, improve cashflow planning and make year-end reconciliation simpler. For example, by recording capital allowance claims or seasonal variations in income during the year, partners can decide whether to change estimated tax payments or adjust drawings.

Record-keeping requirements for partnerships

Partnerships must keep digital records that support each quarterly update. HMRC requires digital records to be maintained in compliant software. Practically, the records should include:

• sales and income records (invoices, EPOS receipts, rent rolls);
• purchase invoices and expense receipts;
• bank statements and reconciliations;
• capital asset purchases and disposals (for capital allowances);
• details of partner introductions and withdrawals, drawings and capital account movements;
• partner profit-share agreements and any changes to profit allocation during the year.

You must retain these records for at least the statutory retention period (generally five years from the 31 January following the tax year end for self-assessment matters), though we recommend keeping digital backups longer for clarity.

Partner-specific records and allocations

Partnerships must be able to show how profits were split and the calculations used to produce partner allocations. If the partnership agreement uses special allocations (for example guaranteed payments, interest on capital, or varied profit shares), ensure your digital records include the formulae or calculations and supporting documents.

How to organise records practically

Good digital record-keeping is about consistent workflows. A simple, reliable approach is:

• set up a single MTD-compatible accounting system for the partnership;
• use bank feeds to reduce manual entry and errors;
• scan and attach purchase invoices and receipts to transactions inside the software;
• maintain a shared folder for partner agreements, capital account schedules and other non-transactional documentation;
• reconcile bank accounts monthly and review partner capital accounts quarterly ahead of the MTD updates.

Choosing MTD-compatible software for partnerships

Not all software packages are equal. When choosing a solution, look for:

• MTD compatibility and direct submission capability to HMRC’s APIs;
• features for multi-partner profit allocation and capital account management;
• bank feed reliability and receipt capture options (mobile apps are useful for tradespeople and landlords);
• ability to export data if you change providers; and
• clear audit trails and document attachment capability.

At Tax Digital we focus on software that makes compliance easy and lets partners concentrate on running their business rather than wrestling with format requirements.

Spreadsheets vs accounting software

You may wonder whether a spreadsheet is enough. Under MTD, HMRC accepts digital records created in spreadsheets only if they are digitally linked to MTD-compatible software for submission (or if the spreadsheet itself is part of an approved compliant system). Manual copying between unlinked spreadsheets and software will not meet the rules.

Spreadsheets can be useful for analysis, but relying on them alone increases error risk and creates extra work at year-end. Commercial accounting software automates record-keeping, maintains audit trails and simplifies quarterly submissions.

Common mistakes partnerships make (and how to avoid them)

• Failing to record partner allocations promptly – update profit shares each quarter to avoid reconciliation headaches later.
• Using non-compliant spreadsheets without digital links – either move to compliant software or use bridging tools that preserve the digital chain.
• Not keeping supporting documents with transactions – scan invoices and attach them in your accounting system.
• Incorrectly treating capital items as revenue costs – capital allowances are handled differently and should be tracked separately.
• Forgetting to record private use or personal drawings adjustments – these affect allowable expenses and partner accounts.

Practical example: a small architectural partnership

Consider an architectural partnership with fluctuating project income and material purchases. Each quarter the partnership should:

• record fees invoiced and retentions released;
• log travel and subsistence (with supporting receipts) and apportion where travel relates partly to a private element;
• record capital purchases like computer equipment or specialist software and claim capital allowances correctly;
• update partner profit allocations where one partner took unpaid leave or changed capital contribution during the period.

Keeping this up-to-date in MTD-compatible software prevents surprises at year-end and helps partners manage personal tax payments.

Deadlines, penalties and reasonable excuses

Quarterly updates must be submitted within the specified time windows. Missing a submission can lead to penalties, particularly if the omission looks deliberate or negligent. HMRC still allows for reasonable excuses (unforeseen IT failure, serious illness), but you should document any issues and contact HMRC promptly.

What about the final declaration and partner Self Assessment returns?

Even with quarterly updates, partnerships must submit a final declaration to confirm the tax position for the year. Partners will continue to include their share of profits on personal Self Assessment returns unless their circumstances change. The quarterly updates feed into the year-end calculations and make completing Self Assessment returns quicker and more accurate.

Agents, accountants and access rights

Partnerships often appoint an agent to manage MTD submissions. Make sure you set up appropriate HMRC agent authorisations and give your agent access within your software. Keep lines of communication open so partners know what has been submitted and can verify partner allocations.

Practical checklist before your first MTD quarter

• Confirm whether the partnership meets the applicable threshold for the tax year.
• Choose and implement MTD-compatible software for partnership accounts and choose a backup or migration plan.
• Set up partner capital accounts and profit-share templates in the software.
• Train the person responsible for day-to-day bookkeeping in the new software workflow.
• Run a month of parallel records if switching systems mid-year to ensure figures reconcile.
• Agree an internal timetable for producing quarterly figures and for partner sign-off.

Transition tips for partnerships already using accounting software

If you already use commercial accounting software, check the vendor’s guidance on MTD for ITSA. Many providers have updates or modules designed specifically for partnerships. Ensure you have the latest version, test the HMRC submission function and confirm it supports multi-partner allocations.

Note for limited companies

Although this guide focuses on partnerships, it is worth noting that MTD for Corporation Tax is not mandated in 2026; HMRC has indicated this is likely to be introduced after 2026 (estimate: 2028+). However, as of March 2026 businesses must use commercial software to file CT600 corporation tax returns. Limited companies should therefore plan for software changes and watch for further HMRC announcements about a formal MTD-CT timetable.

How Tax Digital supports partnerships

Tax Digital helps partnerships make the move to MTD with practical set-up support, software selection advice and training. Our aim is to make compliance straightforward and to reduce the administrative burden on partners so they can focus on running and growing their business.

Frequently asked questions

• Q: Can partners each use different software?

  A: The partnership should use a single set of digital records for partnership income and expenses. Partners may keep personal records separately, but partner allocations and partnership-level submissions should come from the partnership’s MTD-compatible software.

• Q: Do I need to make tax payments quarterly?

  A: Quarterly updates do not automatically change payment schedules. The partnership or partners may still be subject to payments on account or other payment obligations. Quarterly updates inform likely liabilities and can help plan for payments.

• Q: What if a partner joins or leaves mid-year?

  A: Record partnership admission or retirement dates, update the partnership agreement and ensure capital accounts and profit allocation calculations reflect those changes for each quarter.

Final practical advice

Start early. If your partnership will hit the April 2026 threshold, begin implementing compliant software and workflows now. Keep partner allocations transparent and documented. Use quarterly updates as a tool to manage cashflow rather than just as an administrative burden. With thoughtful planning and the right software, MTD can reduce year-end stress and give partners clearer insight into their tax position throughout the year.

Tax Digital makes compliance easy. If you’d like tailored advice for your partnership, we can assess your current records, recommend compatible software and help with the initial submissions so you start with confidence.