Self Assessment Tax Return Preparation
Personal tax returns in Isleworth | Hounslow | Richmond | Ealing | London and across the UK
At Spring Grove Tax, we specialise in preparing and submitting Self-Assessment tax returns for individuals across the UK. Whether you're a sole trader, freelancer, landlord, investor, or company director, we ensure your return is accurate, compliant, and submitted on time.
We help clients identify allowable expenses, avoid penalties, and understand their tax liabilities. Our process is fully online, meaning you can work with us from anywhere, conveniently and securely.
Our services include:
Self-Assessment preparation and filing
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Business income reporting (sole trader, partnerships)
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Property income and investment income schedules
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HMRC Registrations (Self-Assessment, self-employment)
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Tax consultations and software support
Our Tax Return Packages
At Spring Grove Tax, we offer three clear options to suit your personal tax needs.
Whether you’re an employee with a simple tax return or a business owner looking for hands-off support, we’ve got a package that fits.
Spring Grove Essentials
Ideal for non-MTD registered individuals with straightforward tax affairs.
Covers income from employment, pensions, interest, dividends, and/or one sole trade, or one rental property.
Annual Self-Assessment return
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Covers income from employment, pensions, interest, dividends, and/or 1 rental property
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Email support
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One review call per year
No software included
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No bookkeeping or HMRC registration
£200 per year
paid on registration
Spring Grove Plus
MTD Ready
More than compliance – support when you need it.
Ideal for non-VAT sole traders, freelancers, or landlords who want support with accounts, software, and tax advice. Fully MTD compliant from April 2026 for those with income above HMRC thresholds.
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Annual accounts preparation (sole trader or rental)
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Self-Assessment return (all sources of income)
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QuickBooks, or FreeAgent setup & support
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Registration with HMRC
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One tax planning consultation per year
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Ongoing email & phone support
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MTD-compliant software and quarterly submissions (if required)
£60 per month
annual cost of £720
Spring Grove Complete
All-in Support
All-in support, all year round.
Our most comprehensive service, ideal for those with multiple income streams, VAT obligations, or who want peace of mind, and done-for-you support.
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Full bookkeeping (QuickBooks, FreeAgent, Xero on request)
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Annual accounts & Self-Assessment return
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VAT return preparation & filing (if registered)
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Unlimited tax advice and support throughout the year
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Quarterly check-in meetings
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HMRC registrations (Self-Assessment, VAT, PAYE, CIS)
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Income reference letters (e.g. for mortgages)
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MTD-compliant digital record keeping and quarterly submissions (where required)
From £100 per month
annual cost from £1,200
| Self-Assessment Return |
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| Sole Trader / Rental Accounts |
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| HMRC Registrations |
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| Cloud Software (QuickBooks, FreeAgent) |
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| Bookkeeping Support |
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 (client-led) |
(we manage it) |
| VAT Returns |
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| Tax Consultations |
(on request) |
(1 per year) |
(unlimited) |
| Ongoing Support (Email/Phone) |
(on request) |
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(priority) |
| Reference Letters / Mortgage Letters |
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Self-Employed & Sole Trader Services
We work with sole traders and freelancers across a wide range of sectors, including construction, consultancy, design, health & beauty, logistics, and hospitality. If you’re self-employed, we can help you register with HMRC, prepare your accounts, and complete your Self-Assessment tax return.
Our services for the self-employed include:
- HMRC registration (CWF1 for self-employment)
- Preparation of sole trader accounts
- Expense categorisation and advice
- Submission of SA100 + SA103 (self-employment pages)
- Support with cloud accounting tools (QuickBooks, FreeAgent)
- Quarterly VAT return filing (if registered)
- MTD compliance and ongoing advice
Whether you’re just starting out or looking for a more proactive accountant, we’ve got a package that fits your needs.
Tax Services for Landlords
We support UK landlords with reliable and tax-efficient reporting of rental income through the Self-Assessment system. Whether you own a single buy-to-let or manage a small portfolio, we’ll help you claim the right expenses, comply with HMRC rules, and file your return accurately and on time.
We work with:
- Individual landlords with one or more residential rental properties
- Furnished Holiday Let landlords (FHL)
- Landlords receiving UK or foreign property income
Our landlord tax services include:
- Completion of the SA105 rental income pages as part of your Self-Assessment return
- Guidance on allowable expenses, including repairs, insurance, letting fees, and finance costs
- Support with mortgage interest relief restrictions under current tax rules
- Help with keeping records or using cloud accounting tools (QuickBooks, FreeAgent, etc.)
- Capital Gains Tax (CGT) calculations and reporting if you’ve sold a property
- Advice on upcoming Making Tax Digital for Income Tax requirements (mandatory from April 2026 if rental income exceeds £50,000)
Let us take the stress out of rental income tax – so you can focus on managing your property, not your paperwork.
Investor Tax Services
Are you an investor with income from shares, dividends, interest, crypto, or capital gains? We provide expert support with Self-Assessment for investors, ensuring your returns are accurate, fully compliant, and tax-efficient.
We help with:
- Dividend and interest income reporting
- UK and overseas investment income
- Capital gains tax (CGT) on shares, crypto assets, and property
- Use of annual allowances and loss relief
- Cryptocurrency gain/loss reports (from platforms like Coinbase, Binance, etc.)
- Support for high-volume or complex portfolios
Whether you’re a long-term investor, day trader, or crypto enthusiast, we’ll ensure your investments are reported correctly and any tax due is minimised.
Standalone Services
We understand that sometimes you may only need help with a one-off task. You can purchase the following services individually, whether or not you’re on one of our packages.
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All standalone services include HMRC submission and confirmation of registration where applicable.
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Consultations are ideal for tax planning, clarifying HMRC notices, or checking your obligations.
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Reference letters are professionally prepared and accepted by most UK lenders and letting agents.
Need Something Not Listed?
If you need assistance with something not listed above (e.g. amending a return, CGT reporting, or director loan account reviews), just get in touch and we’ll provide a tailored quote.
Coming Soon:
Making Tax Digital (MTD) for Income Tax – Get Ready for April 2026 and Beyond
What is Making Tax Digital (MTD)?
Making Tax Digital (MTD) is an HMRC initiative designed to modernise the UK tax system. It aims to make tax reporting more accurate, efficient, and easier for individuals and businesses by moving it online.
Under MTD for Income Tax Self-Assessment (ITSA), affected individuals will need to:
- Keep digital records of their income and expenses
- Use MTD-compatible software to send quarterly updates to HMRC
- Submit a final declaration at the end of the tax year (replacing the traditional Self-Assessment return)
This means no more piles of paperwork or last-minute tax return stress—just a more streamlined, digital-first approach to managing your taxes.
When Will MTD Apply to You?
MTD is being introduced in stages, based on your income level:
- From April 2026: If your total income from self-employment and/or property is over £50,000 per year, you’ll need to comply with MTD.
- From April 2027: The threshold lowers to include those earning between £30,000 and £50,000.
- From April 2028: MTD will apply to individuals with income over £20,000 from self-employment and/or property.
How to Prepare
If your income is near any of these thresholds, it’s a smart move to start preparing now. Our Plus and Complete packages include cloud accounting software like QuickBooks or FreeAgent, along with full support to help you stay MTD-compliant, well ahead of the deadlines.