Significant changes are scheduled for the UK tax system in 2026. MTD ITSA will become mandatory for sole traders and landlords earning over £50,000 from 6 April 2026. Employers should also prepare for updates in benefits reporting. Although HMRC initially planned to mandate payrolling of most benefits in 2026, this has now been postponed to April 2027. Affected businesses must meet new digital reporting requirements for MTD ITSA, and employers should also prepare for updates to benefits reporting ahead of the revised mandatory payrolling start date.
For many businesses, this shift will transform tax administration from an annual process to more frequent, digital reporting. Delaying preparations could lead to turmoil, but planning ahead will give you a chance to improve record-keeping, minimise mistakes, and obtain a clearer understanding of your tax situation throughout the year.
What Are MTD, ITSA and P11D?
MTD ITSA is HMRC’s updated system for reporting income tax for sole traders and landlords. Instead of reporting only once a year, individuals within MTD ITSA must keep digital records and send quarterly updates to HMRC via compatible software for their self‑employment and rental income. At the end of the tax year, they must still complete an annual year‑end submission through MTD‑compatible software (a final declaration that confirms their total income and adjustments for the year), and some individuals may still need to file a Self Assessment tax return for other income or reliefs. The way tax is calculated and paid, including payments on account and balancing payments, currently remains unchanged under MTD ITSA.
An employer P11D is used to report employee benefits and expenses that are not processed through payroll, such as certain taxable perks. Employers may also need to submit a P11D(b) form to report the total Class 1A National Insurance contributions due. Under current regulations, P11D and P11D(b) reporting remains in place. HMRC has confirmed that mandatory payrolling of most benefits in kind will not start until April 2027. From that point, almost all benefits will be taxed through payroll in real time, while employment‑related loans and employer‑provided accommodation will initially sit outside mandatory payrolling and can either be payrolled voluntarily or continue to be reported on P11D, pending further HMRC guidance on their longer‑term treatment.
Impact of MTD ITSA and P11D Changes on Your Business
Impact on Small Businesses and Freelancers
For sole traders, freelancers, and self-employed professionals, MTD ITSA will significantly change how tax affairs are managed. Starting in April 2026, self-employed individuals or those with property income exceeding £50,000 will be required to keep digital records and submit quarterly updates using compatible software. This means that established methods such as spreadsheets and paper notes will no longer suffice unless supported by MTD-compliant processes or bridging tools.
The practical consequences are clear: regular bookkeeping updates, selecting suitable software, and meeting quarterly reporting deadlines will become essential. However, HMRC has indicated that no penalty points will be imposed for late quarterly updates during the first year (2026-2027) for those required to join MTD ITSA from April 2026. Despite this, penalties may still apply for late tax returns and payments, so businesses should treat this period as a grace period rather than a complete free pass.
Impact on Landlords
Landlords will need to ensure that, if their rental income exceeds the threshold, they are ready for MTD ITSA. The rules apply to both self-employed and property income, with HMRC assessing compliance based on your qualifying income. For landlords with jointly owned properties, each individual is responsible for submitting their own quarterly updates showing their share of income and expenses. While landlords can enter rental income and expenses throughout the year, MTD ITSA permits some flexibility: you may report either actual income and expenses per quarter or estimated figures in each update, followed by a final adjustment with actual totals at year-end.
For landlords, the main challenge is maintaining consistent record-keeping and prompt submissions throughout the year. Rental businesses often encounter irregular expenditure patterns, for example, sudden repairs or periodic agency fees, as well as quarters with minimal or no financial activity. Under MTD ITSA, landlords are required to submit quarterly updates regardless of whether they have any rental income or incurred any expenses during the period. This requirement guarantees landlords have a continuous, up-to-date overview of their tax position, encouraging faster identification of variances and liabilities compared to the previous practice of annual Self Assessment reporting.
Impact on Employers Handling Benefits
Employers should prioritise preparing for 2026 by making sure all taxable employee benefits not processed via payroll are reported on P11D and P11D(b), which are generally due by 6 July, and that Class 1A National Insurance is due by 22 July if paid electronically.
In 2026, review your payroll systems and benefits policies so you are ready for the move to mandatory payrolling of most benefits from April 2027. Update payroll controls and staff communications, and check if your software can support both future payrolling of benefits and any remaining P11D reporting. From April 2027, almost all benefits will need to be payrolled, while employment‑related loans and employer‑provided accommodation will initially remain outside mandatory payrolling and can either be payrolled voluntarily or continue to be reported on P11D, pending further HMRC guidance on their longer‑term treatment.
Key Dates & Deadlines for MTD ITSA and P11D Updates
For MTD ITSA:
- 6 April 2026: MTD ITSA becomes mandatory for sole traders and landlords with qualifying income over £50,000, based on the 2024-2025 tax year.
- 7 August 2026: First quarterly update due date if using standard update periods.
- 7 November 2026: Second quarterly update deadline.
- 7 February 2027: Third quarterly update deadline.
- 7 May 2027: Fourth quarterly update deadline.
HMRC recommends signing up for MTD ITSA before the start date and submitting a final Self Assessment return for the previous year before moving to digital reporting.
For P11D and Benefits Reporting:
- 6 July (post‑tax year): Deadline for reporting expenses and benefits on forms P11D and P11D(b), and for providing employees with details of their benefits.
- 22 July (post‑tax year): Deadline for paying Class 1A National Insurance when paying electronically.
- During 2026: HMRC is expected to publish further detailed guidance and legislation on the move to mandatory payrolling of benefits in kind.
- From April 2027: Mandatory payrolling will apply to most benefits in kind, while employment‑related loans and employer‑provided accommodation will initially remain outside the mandatory rules and may continue to be reported on P11D or payrolled voluntarily, with HMRC due to set out the longer‑term position in due course.
Steps to Prepare for MTD ITSA and P11D Changes
- Confirm MTD ITSA Eligibility – Check if your income meets or exceeds the £50,000 threshold for MTD ITSA, starting in April 2026. Don’t wait for HMRC to notify you; it’s your responsibility to confirm your compliance.
- Assess Your Bookkeeping – Transition from manual record-keeping to MTD-compliant software. Starting early makes it easier to develop efficient practices before mandatory quarterly reporting begins.
- Complete Your Last Self Assessment Return – Ensure that your final Self Assessment return is submitted before moving to the MTD ITSA system.
- Prepare for Digital Record Management (Sole Traders & Landlords) – To efficiently manage digital records by April 2026, first test your chosen software and processes. Decide in advance who will enter records, how accuracy will be verified, and how quarterly updates will be submitted. If collaborating with an accountant or tax adviser, explicitly agree on roles and software access before starting the digital process.
- Audit Benefits Reporting for Employers – Identify payroll-processed and P11D-reported benefits. Ensure your payroll software is ready for the 2027 changes and update employee communications so staff understand benefit processing and reporting.
The 2026 tax reforms are more than just another regulatory update. For sole traders and landlords, MTD ITSA amounts to a major shift toward digital record-keeping and more frequent reporting. For employers, the P11D system remains in place for now, but 2026 functions as an important preparatory year before the mandatory payrolling of most benefits begins in 2027.
Businesses that start preparing now will be in a much better position than those who wait until the deadline. Whether you’re self-employed, manage rental properties, or handle payroll for a growing team, now is the time to review your systems, and make sure your business is ready for the future of UK tax reporting. Book a free consultation with us today to get professional support and prepare your business for the upcoming tax changes.
