You've prepared your quarterly update, checked your records, and you're ready to submit - but HMRC's Making Tax Digital service won't load. Or maybe it's showing error messages. With the 7 August 2026 Q1 deadline approaching, service outages can feel like a crisis.

Don't panic. HMRC systems do go down, sometimes at the worst possible moments. But there are clear steps to take, protections in place, and ways to document your attempts to file on time. Here's exactly what to do if MTD service issues threaten your deadline.

First Steps: Check What's Actually Wrong

Before assuming HMRC's systems are down, rule out issues on your end first.

Check Your Internet Connection

Test other websites. Try accessing your bank or any government service. If nothing loads properly, the problem is your connection, not HMRC's servers.

Try Different Browsers and Devices

Sometimes browser cache or cookies cause problems. Try:

Check Your MTD Software

If you're using MTD software that connects to HMRC, the issue might be with the software provider, not HMRC directly. Check:

Note: Some MTD software providers have their own server issues that prevent connection to HMRC, even when HMRC's systems are working fine.

Check HMRC's Official Service Status

HMRC maintains an official service availability page that shows the current status of all their online services, including MTD.

Where to Check

Visit HMRC's service availability page on GOV.UK. This page shows:

What the Status Updates Mean

Social Media and News

HMRC also posts service updates on their Twitter account (@HMRCcustomers). Major outages often get picked up by tech news sites and accounting publications too.

Document Your Filing Attempts

If HMRC's service is genuinely unavailable, you need to create a paper trail showing you tried to file on time.

Take Screenshots

Capture screenshots showing:

Keep Detailed Records

Write down:

Try Multiple Times

Don't just try once. Service outages can be intermittent, with systems coming online and going down again. Try every few hours and document each attempt.

Warning: Don't wait until the deadline day to file. If you leave it until 7 August and there are service issues, you'll have very little time to resolve problems or find alternatives.

Understand Your Deadline Protections

HMRC does provide some protection when their service issues prevent you from filing on time, but the rules are specific.

When HMRC Accepts Service Issues as Valid Excuses

HMRC will typically waive penalties if:

What Doesn't Count

HMRC won't accept:

The "Reasonable Excuse" Test

For service issues to count as a reasonable excuse for late filing, HMRC looks at:

For more context on penalties and reasonable excuses, see our guide on MTD penalties and what happens if you file late.

Alternative Filing Options

During service outages, HMRC sometimes provides alternative ways to meet your obligations.

Check for HMRC Announcements

During major outages, HMRC may:

These announcements typically appear on GOV.UK and HMRC's social media accounts.

MTD Software Alternatives

If your current MTD software can't connect to HMRC, you might be able to use alternative software to submit the same information. However:

Check our comparison of MTD software options for sole traders if you need alternatives quickly.

When and How to Contact HMRC

Sometimes you'll need to speak to HMRC directly about service issues affecting your filing.

When to Call

Contact HMRC if:

What Information to Have Ready

Before calling HMRC, prepare:

HMRC Contact Numbers

For MTD issues, call the Income Tax Self Assessment helpline on 0300 200 3310. Lines are open Monday to Friday, 8am to 6pm.

Note: HMRC phone lines get very busy around quarterly deadlines. Try calling early in the morning or later in the afternoon for shorter wait times.

Preventing Future Service Issues

While you can't control HMRC's servers, you can reduce your risk of being caught out by service problems.

File Early

The best protection is filing well before the deadline. HMRC's systems are usually most stable in the middle of the quarterly period, not in the final few days when everyone is rushing to file.

Check our mid-May Q1 checkpoint guide for tips on staying on track throughout the quarter.

Keep Backup Software Options

Consider having a second MTD software option set up as a backup. This could be:

Our guide to MTD bridging software explains simple backup options.

Monitor Service Status Regularly

In the week before quarterly deadlines, check HMRC's service status page daily. If maintenance is scheduled around your filing time, plan accordingly.

Keep Your Records Current

Don't leave record-keeping until the last minute. If service issues do occur, you'll want your financial records ready to input into alternative software quickly.

Our Q1 record-keeping guide shows exactly what information you need organised.

What About the 7 August 2026 Q1 Deadline?

The Q1 2026-27 deadline on 7 August 2026 will be many people's first MTD quarterly filing. This creates additional risk of service problems due to high demand.

Higher Risk Periods

Expect potential service issues:

Plan Around Peak Times

If possible, aim to file:

Check all the MTD quarterly deadlines for 2026-27 to plan your filing schedule.

Avoid Service Issue Stress

Don't wait until the last minute to set up your MTD filing. Get your software ready now and file early to avoid deadline day service problems.

Start Your Setup Today

Service outages are frustrating, but they don't have to result in penalties if you document your attempts properly and file as soon as service is restored. The key is not leaving everything until deadline day - both for your own peace of mind and to give yourself alternatives if HMRC's systems aren't cooperating.