A lot of UK small business owners hear “Making Tax Digital” and assume it’s already sorted, because their accountant mentioned it once and nothing seemed to change. For VAT-registered businesses, that assumption is worth double-checking. Making Tax Digital for VAT isn’t a one-time software purchase you tick off and forget — it’s an ongoing requirement about how records are kept and how returns are submitted, and HMRC’s compliance checks have gotten more consistent about catching businesses that technically use compatible software but aren’t actually following the digital record-keeping rules underneath it.

Here’s what Making Tax Digital for VAT actually requires in practice, where small businesses most often fall short without realising it, and how to build a process that stays compliant without becoming a monthly headache.

What Making Tax Digital for VAT Actually Requires

At its core, MTD for VAT has two requirements that matter far more than most business owners realise. First, VAT records have to be kept digitally, in what HMRC calls “functional compatible software” — meaning the records themselves, not just the final return, need to exist in digital form. Second, and this is the part that trips people up, data has to move between any different pieces of software used in the process through a digital link, not by manually retyping numbers from one system into another.

That second requirement is where a lot of otherwise-compliant-looking businesses actually fall short. A business might keep clean digital records in one piece of software, then manually re-enter summary totals into a separate spreadsheet or portal to file the actual return. If any of those transfers involve someone typing a number by hand, copying and pasting between unconnected tools, or manually recalculating a total, the digital link requirement isn’t being met — even though every individual piece of the process looks digital on its own. HMRC has specifically flagged manual copy-and-paste between systems as breaking the digital link chain, so it’s worth checking exactly how data moves from your bookkeeping software to whatever actually submits your return.

Who Actually Needs to Comply

MTD for VAT applies to VAT-registered businesses, and the registration threshold itself — set by HMRC and reviewed periodically — is the same threshold that determines whether a business needs to register for VAT in the first place. Because that figure changes from time to time, it’s worth confirming the current threshold directly with your accountant or HMRC’s published guidance rather than relying on a number that may be out of date by the time you’re reading this.

What’s easy to miss is that once a business is VAT-registered, MTD applies regardless of how small the business actually is in revenue terms — there’s no separate small-business exemption sitting underneath the VAT threshold itself. A business that voluntarily registers for VAT below the mandatory threshold, which some do specifically to reclaim VAT on business expenses, takes on the MTD obligation along with registration, not as a separate later step.

Choosing Software That Actually Fits How You Work

The practical starting point for most small businesses is choosing accounting software from HMRC’s list of recognised MTD-compatible providers, rather than trying to bridge a general spreadsheet into compliance after the fact. Full accounting software that handles invoicing, expense tracking, and VAT calculation in one connected system tends to be the simpler long-term choice, because the digital link requirement is satisfied automatically within the platform rather than needing to be engineered between separate tools.

For businesses that are genuinely attached to spreadsheet-based bookkeeping — and plenty of small operations are, often for good reason — bridging software exists specifically to connect a compliant spreadsheet to HMRC’s system without manual re-entry. This can work well, but it puts more responsibility on the business to make sure the spreadsheet itself is structured correctly and that the bridging connection stays intact as the spreadsheet evolves. If your bookkeeping process depends on someone occasionally restructuring the spreadsheet to make a report look clearer, that’s exactly the kind of change that can quietly break a bridging link without anyone noticing until a return fails to submit.

Where the Digital Record-Keeping Actually Starts

A common misconception is that MTD compliance is really about the software used to file the return. In practice, it’s more about the discipline applied to the records from the moment a transaction happens. Every VAT-relevant sale and purchase needs to be recorded digitally, with the specific details HMRC requires — including the VAT rate applied and the amount of VAT itself, not just a total figure. A business that’s diligent about digital invoicing and expense capture as part of its regular invoicing process has already done most of the heavy lifting; a business that still relies on paper receipts photographed at the end of the month has more manual re-entry built into its process, which is exactly where digital link problems tend to creep in.

What Actually Triggers HMRC Attention

A few patterns account for most of the MTD-related problems small businesses run into. Using compatible software but still manually transferring figures between two disconnected tools is the most common, since it looks compliant on the surface while breaking the actual digital link requirement underneath. Falling behind on record-keeping and reconstructing several months of transactions right before a filing deadline is another — it’s technically possible to catch up, but the quality of records built under that kind of time pressure tends to be worse, which increases the odds of an error that draws scrutiny. Missing a filing deadline outright, even once, adds to a penalty points system that accumulates over a rolling period, and repeated late filings escalate from there. And treating MTD as a filing-time concern rather than an ongoing record-keeping standard is really the root cause behind most of the other mistakes — the software choice matters less than the habits built around it.

Penalties Are Points-Based, Not One-and-Done

HMRC’s late submission framework for VAT works on a points system: each missed deadline adds a point, and crossing a threshold within a rolling period triggers a financial penalty, with points expiring after a period of consistent on-time filing. This structure means a single late return, corrected quickly, is a much smaller problem than a pattern of near-misses that keeps adding points without ever quite triggering the initial penalty — right up until it does. Treating every deadline as a hard one, rather than assuming a bit of slack exists, is the safer habit to build.

Bringing MTD Into Your Regular Bookkeeping Rhythm

The businesses that handle MTD for VAT smoothly tend to be the ones where digital, compliant record-keeping is just how the books are kept day to day, not a separate quarterly project layered on top. That means invoices and expenses entered close to when they happen, a single connected software setup rather than a patchwork of manually bridged tools, and a monthly rhythm of reviewing VAT figures rather than waiting until the return is due to look at them for the first time. This connects directly to broader bank reconciliation discipline — a business reconciling its accounts monthly is already most of the way toward clean, submission-ready VAT records, because the underlying transaction data has already been checked and corrected before the return is even prepared.

A Quick Recap

• MTD for VAT requires both digital record-keeping and unbroken digital links between any software used in the process — manual re-entry breaks compliance even with compatible software.
• Every VAT-registered business is in scope, including those that registered voluntarily below the mandatory threshold.
• Full connected accounting software is usually simpler to stay compliant with than bridged spreadsheets, though both are valid options.
• Late filings accumulate penalty points over a rolling period rather than resetting after each return.
• Compliance is really about ongoing record-keeping habits, not the software chosen at the outset.

Where to Go From Here

Making Tax Digital for VAT rewards businesses that treat digital record-keeping as a standing habit rather than a quarterly scramble. Alongside the broader UK filing calendar covered in our UK Self Assessment and MTD deadlines guide, staying ahead of VAT record-keeping requirements is one more piece of a compliance routine that gets easier, not harder, the more consistently it’s followed.

AMF Advisors’ bookkeeping services for UK small businesses include MTD-compliant digital record-keeping and VAT return preparation built into the regular monthly close. Book a free consultation and we’ll review your current setup for any digital link gaps before HMRC does.