Self-Employed in Manchester? Your First Tax Return, Explained
Your first Self Assessment doesn't have to be stressful. Here's what you actually need to do, by when, and what a Manchester accountant typically charges to handle it for you.
Checked against official gov.uk / regulator guidance — last verified 3 July 2026
When you need to register
If you started working for yourself (sole trader, freelancer, or any self-employed income) in the current tax year, you need to register for Self Assessment with HMRC by 5 October following the end of that tax year. Miss this and you can be fined even if you don't end up owing any tax.
The key dates that actually matter
The tax year runs 6 April to 5 April. Your online Self Assessment return and any tax owed are both due by 31 January following the end of that tax year — so income earned in the 2025/26 tax year (6 April 2025 – 5 April 2026) needs to be filed and paid by 31 January 2027.
If you'll owe more than £1,000, HMRC may also ask for a "payment on account" — an advance payment toward next year's bill, due in two instalments (31 January and 31 July). This catches a lot of first-timers off guard because the bill is bigger than expected in year one.
What you actually need to track
Keep records of all business income, and all allowable expenses — things like a proportion of home working costs, business travel, equipment, software subscriptions, and professional fees (including accountant fees). Poor records are the single biggest reason first-time filers either overpay or get flagged for a compliance check.
DIY it, or get an accountant?
HMRC's online system is usable for very simple, single-income situations. But if you have multiple income sources, claim expenses, or aren't confident you're claiming everything you're entitled to, a local accountant usually pays for themselves — Manchester accountants typically charge £150–£350 for a straightforward sole trader Self Assessment, which is often less than the tax relief they identify.
First Self Assessment checklist
- Registered for Self Assessment with HMRC (by 5 October after your first year of trading)
- Got your UTR (Unique Taxpayer Reference) and set up your Government Gateway login
- Income and expenses tracked throughout the year, not reconstructed in January
- Return filed and tax paid by 31 January
- Budgeted for "payment on account" if your bill is likely to exceed £1,000
Questions about this
How much does an accountant cost for a self-employed tax return in Manchester?
Typically £150–£350 for a straightforward sole trader Self Assessment. Use our accountant cost calculator for a range based on what you need.
What happens if I miss the 31 January deadline?
An automatic £100 penalty applies even if you owe no tax, with further daily penalties after 3 months and additional charges after 6 and 12 months — full details on gov.uk. Interest is also charged on any tax paid late.
Can I claim my accountant's fees as a business expense?
Yes — accountancy fees for preparing your business accounts and tax return are an allowable business expense.
Kamran, Founder of ManchesterPros
Manchester-based, building the directory Manchester residents use to find checked local pros. Guides are researched and cross-checked against official gov.uk and regulator guidance before publishing — see sources linked above.