How Accountants Should Prepare Clients for MTD

If you are an accountant with sole trader or landlord clients, MTD for Income Tax is as much your problem as theirs. Your clients are looking to you for guidance, and the ones who feel prepared will stay. The ones who feel abandoned will look elsewhere. Here is how to manage the transition across your practice without losing clients or your sanity.

Start by segmenting your client base. Identify every client with self-employment or property income above £50,000 — they are mandatory from April 2026. Then identify those between £30,000 and £50,000 — mandatory from April 2027. Finally, flag anyone below £30,000 who might benefit from early adoption. This segmentation tells you who needs immediate attention and who you can bring along later.

Communication is everything. Send a clear, jargon-free letter or email to every affected client explaining what MTD means for them specifically. Avoid generic HMRC language. Instead, tell them what will change in their routine, what software they will need, and what your role will be in the process. Most clients do not read HMRC guidance. They read what their accountant sends them.

The software decision is critical. You have two broad options. Either recommend a single piece of software for all your clients, or allow clients to choose their own from the HMRC-compatible list. The first approach gives you consistency — you learn one platform deeply and can support all clients efficiently. The second gives clients flexibility but means you are juggling multiple platforms. For most small to medium practices, standardising on one platform makes more sense. Tools like Accounted are designed specifically for sole traders and landlords, which covers the majority of MTD-affected clients.

Define your service model early. Will you submit quarterly updates on behalf of clients, or will clients submit their own updates with you handling the final declaration? Both models work, but they have very different pricing and workflow implications. If you are submitting quarterly updates for clients, you need to build that into your fee structure now. Four additional submissions per year per client is significant additional work.

Onboarding is the bottleneck. Getting clients set up on new software, with their records imported and their HMRC agent authorisation in place, takes time. If you leave this until March 2026, you will not get through your client base in time. Start onboarding now. Aim to have all April 2026 clients set up and practising by January 2026 at the latest.

Training your own staff is equally important. Every member of your team who handles Self Assessment work needs to understand the MTD workflow end to end. This includes software setup, quarterly submission, error handling, and HMRC communication. Invest in training now rather than learning on the job when deadlines are live.

One practical tip: run a shadow quarter. Have your clients record their transactions in the new software for the current tax year without actually submitting to HMRC. This lets them build the habit and lets you verify that the data quality is sufficient before the first real submission is due.

Fee conversations need to happen proactively. MTD means more work for you unless clients take on more of the bookkeeping themselves. Either way, your fees need to reflect the new reality. Clients who expect the same service at the same price will be disappointed. Frame the conversation around value — better financial visibility, fewer surprises at year end, reduced penalty risk — rather than just additional compliance cost.

Finally, consider whether MTD represents an opportunity for your practice rather than just a burden. Clients who move to digital bookkeeping generate better data, need less year-end cleanup, and are easier to serve at scale. The practices that use MTD as a catalyst to modernise their workflows will be more profitable and more scalable than those that try to bolt digital quarterly returns onto an analogue practice model.