MTD penalties and the first-year grace period
How the points-based penalties work, what the first-year grace covers, and how interest on late tax is charged.
MTD adds more deadlines, so it’s fair to ask what happens if you miss one. The short version: late submissions are handled by a points system, and late tax attracts interest and separate penalties. There’s also a softer-touch first year while everyone finds their feet. Here’s how it fits together — always confirm the current figures on GOV.UK.
Late submissions: a points system
Instead of an instant fine, each missed submission deadline earns you a penalty point. Reach the points threshold for your submission frequency and a fixed penalty (currently £200) applies — with a further £200 for each subsequent default while you’re at the threshold. Points aren’t forever: they expire after a period of submitting on time, so getting back on track clears the slate. The exact thresholds depend on how often you submit, so check the current rules.
Late tax: interest and penalties
Missing a payment is treated separately from missing a submission. Interest runs on tax paid late from the due date until you pay, and late-payment penalties can apply the longer it stays outstanding. Your tax payment dates don’t change under MTD — it’s the record-keeping and quarterly updates that are new, not when the bill is due.
The first-year grace period
HMRC has signalled a lighter-touch approach in the first year as people adjust to quarterly updates — penalties for late quarterly updates are expected to be softened while the system beds in. Treat that as breathing room, not a free pass: the requirement to keep digital records and submit still applies, and interest on late tax isn’t part of the easement.
Joint owners: separate exposure
If you co-own, remember there’s no shared return — so there’s no shared penalty position either. Each co-owner has their own deadlines and their own points and penalties. One of you filing late doesn’t affect the other, and vice versa. See the couples guide.
How to stay penalty-free
- Know your dates — the deadlines calendar lists all four plus the final declaration.
- Use software that keeps a running total and reminds you before each deadline.
- Keep digital records as you go, so a quarterly update is a five-minute job, not a scramble.
- Set your own calendar alerts a week ahead of each date.
Pick a tool that makes this painless with the two-minute picker, and print the prep checklist so nothing slips.
Put this into practice
Two tools do the heavy lifting — find your software, or work out your exact mandation date.
New to all this? Start with the pillar guide: When does MTD start for me? (free calculator).