Missing the 31 January deadline costs an automatic £100 penalty — even if you owe nothing. Direct Assist Accountants handles your Self Assessment from start to finish, making sure it's accurate, submitted on time, and claims every allowable expense you're entitled to.
Self Assessment feels straightforward until you're actually doing it — then the questions pile up. Which expenses can you actually claim? Does your side income count? What happens if you're a few days late? HMRC issues an automatic £100 penalty the moment the 31 January deadline passes, rising further the longer it's left, plus daily penalties after three months and interest on anything owed. The bigger cost is usually what people miss, not what they file late. Underclaiming expenses, forgetting a second income source, or getting Payments on Account wrong can mean overpaying tax for years without realising it — or worse, underpaying and facing an unexpected bill (or HMRC enquiry) down the line.
Who Needs to File a Self Assessment Tax Return?
We handle your Unique Taxpayer Reference (UTR) registration if you're filing for the first time, so you're set up correctly from day one.
Every income source, expense, and relief calculated properly and cross-checked before submission — no rushed, last-minute guesswork.
We review your allowable expenses and reliefs in detail, making sure you're not paying more tax than you legally need to.
We track your deadline and file well ahead of 31 January, so there's never a last-minute scramble or late penalty.
Any queries or letters from HMRC about your return are handled directly by us, on your behalf.
The online filing deadline is 31 January following the end of the tax year (5 April). Payment of any tax owed is also due by this date.
HMRC issues an automatic £100 penalty the day after the deadline, even if you owe no tax. Further penalties apply after 3, 6, and 12 months, plus interest on unpaid tax.
Yes — if you earn additional untaxed income (freelance work, rental income, dividends over the allowance), you generally need to register and file a return.
This varies by business, but common allowable expenses include office costs, travel, equipment, professional fees, and a portion of home-office costs. We review your specific situation to maximise what you can claim.
We handle the entire process, starting with registering you for a UTR number with HMRC if you don’t already have one.
Yes, we regularly help clients catch up on overdue returns and communicate with HMRC to minimise penalties where possible.
Our team is part of Direct Assist Accountants' ACCA-regulated practice in Slough
See our full range of accounting services for individuals and businesses
Direct Assist Accountants have been incredibly reliable in managing our bookkeeping, payroll, and tax returns. Their team is always available to answer questions and explain things clearly, making our accounting stress-free. We feel confident knowing everything is handled accurately and on time. Highly recommended for any business looking for professional support in Slough!
Read moreOne of the most proactive accountants in Slough and the surrounding areas. They always prepare and finalize my VAT returns well in advance, allowing me to plan and manage my taxes effectively.
Read moreBrilliant firm. They have been doing my accounts for over 10 years with extraordinary professional skills. Have been recommended them to a few of my associates & they sing their praises of them. We highly recommend Direct Assist Accountants.
Read moreI have been using Direct Assist Accountants for a very long time. I am very happy with their services. Direct Assist Accountants is a specialist small business accountant and I have no doubt about this. They have a good reputation for providing first-class services. I am happy with them.
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