FROM £199 ONE-OFF OR £39/MONTH
Self Assessment Tax Returns: Filed Right, On Time
Based in Harrow, London, we handle everything from gathering your records to filing with HMRC. No stress, no penalties, no overpaying.
Who Needs to File a Self Assessment?
You must file a Self Assessment tax return if any of the following apply to you:
Self-employed sole traders — even if you earned less than £1,000
Landlords with rental income — including those affected by MTD from April 2026
Company directors — unless your only income is PAYE salary with no benefits
High earners over £100,000 — or those claiming the personal allowance taper
Employed with side income — freelance work, investments or foreign income
Partners in a business — each partner must file individually
Capital gains — property, shares or other assets sold at a profit
Child Benefit earners — income over £50,000 and claiming Child Benefit (HICBC)
Not sure if you need to file? Contact us for free advice — we will check your situation and let you know within 24 hours.
Key Deadlines & Penalties
Missing HMRC deadlines means automatic penalties. Here are the dates you need to know for the 2025/26 tax year:
Deadlines
5 Oct 2026 — Register for Self Assessment (first-time filers)
31 Oct 2026 — Paper tax return deadline
31 Jan 2027 — Online filing + payment deadline
31 Jul 2027 — Second payment on account
Penalties
1 day late — £100 automatic penalty
3 months late — £10/day up to £900
6 months late — 5% of tax or £300
12 months late — further 5% or £300 + prosecution risk
Our advice: Do not wait until January. Filing early gives you months to plan your payment. Most of our clients file between April and October.
What Is Included in Our Service
When you choose HS Global Accountancy for your Self Assessment, you get a complete, end-to-end service:
Document collection — we tell you exactly what records we need and chase anything missing
Income & expense review — thorough review of all income sources and allowable deductions
Tax calculation — accurate computation with all available reliefs applied
HMRC submission — we file electronically and confirm receipt
Payment reminders — we remind you before every deadline so you are never caught out
Tax planning advice — practical tips to reduce next year’s bill legally
HMRC correspondence — we handle any queries or investigations on your behalf
Year-round support — questions about your tax? Available by phone, email or WhatsApp
Transparent, Fixed-Fee Pricing
SELF ASSESSMENT ONLY
£199
one-off fee
Straightforward tax returns for employed individuals with additional income, simple self-employment, or basic rental income.
LANDLORD RETURNS
£249
one-off fee
Multiple properties, allowable expenses, mortgage interest relief, capital allowances. Full rental income optimisation.
MONTHLY PACKAGE
£39
per month
Self Assessment included plus year-round bookkeeping, tax planning, payment reminders and unlimited support.
Last-minute returns (within 2 weeks of deadline): £299 — guaranteed on-time filing.
Self Assessment: Frequently Asked Questions
How much does a Self Assessment tax return cost?
Our Self Assessment service starts from £199 for straightforward returns. Rental income returns start from £249. We also offer monthly packages from £39/month that include Self Assessment plus year-round bookkeeping and support.
When is the deadline for filing my tax return?
The online filing deadline for the 2025/26 tax year is 31 January 2027. We strongly recommend filing between April and October to allow time for tax planning and to avoid the January rush.
What records do I need to provide?
This depends on your income sources, but typically includes: P60/P45 from employment, invoices and receipts for self-employment, rental income records, bank statements, dividend vouchers, and pension statements. We provide a clear checklist tailored to your situation.
Can you help if I have missed previous tax returns?
Yes. We regularly help clients who have missed one or more years of filing. We can prepare backdated returns, negotiate with HMRC on penalties, and get you fully up to date. The sooner you act, the lower the penalties.
Do I need to file if I earned less than the personal allowance?
If HMRC has asked you to file, you must file even if you earned below the personal allowance (£12,570). However, you may be able to request removal from Self Assessment if your circumstances have changed. We can advise on this.
What happens if I file my tax return late?
You will receive an automatic £100 penalty even if you owe no tax. After 3 months, daily penalties of £10 apply (up to £900). After 6 and 12 months, further penalties of 5% of tax owed or £300 (whichever is greater) are added.
Ready to Get Your Tax Return Sorted?
Get in touch today for a free, no-obligation quote. We will review your situation and give you a clear price before you commit to anything.