Self Assestment

Make Your Self Assessment Simple

If you’re self-employed, a company director, a landlord, an investor, or earning income outside PAYE, you’re legally required to file a Self Assessment tax return every year.

Sadler & Frost handles the entire process for you — ensuring your return is filed correctly, on time, and with every possible tax relief claimed.

What We Do

We handle your entire Self Assessment process from start to finish. This includes full preparation and submission of your SA100, covering all types of income such as employment, self-employment, dividends, rental income, overseas income, crypto, and investments.

We also identify every allowable expense to legally reduce your tax bill, perform a full compliance and accuracy review to avoid penalties, and manage everything through a fully digital and secure workflow — so you can simply upload your documents and let us do the rest.

FAQ

Self Assessment — Frequently Asked Questions

Do I need to file a Self Assessment tax return?

You must file if you’re self-employed, a company director, a landlord, receiving dividends or investment income, earning overseas income, or have income not taxed through PAYE.

What documents do I need to provide?

We typically need your payslips or P60, bank interest statements, dividend vouchers, rental income details, self-employment expenses, and any investment or crypto reports. You can upload everything digitally.

Can you file my Self Assessment even if I’m late?

Yes. We can complete and submit late returns, calculate your penalties, and help you minimise them where possible.

How early should I submit my return?

The earlier the better. Submitting early helps you plan your tax bill in advance, avoid penalties, and gives extra time to gather missing information.

Yes. Employment, self-employment, dividends, rental income, overseas income, capital gains, crypto trading — we include all income streams in a single SA100.

Will you help me claim tax deductions?

Absolutely. We identify all allowable expenses and reliefs you’re entitled to, helping you reduce your tax bill legally and efficiently.

How do I know my return is accurate?

Your Self Assessment goes through a full compliance check by our tax specialists before submission to HMRC.

What if I’ve never filed a return before?

No problem. We register you for Self Assessment, guide you on what to provide, and handle the entire process end-to-end.

Can you fix or amend a previous tax return?

Fees depend on how many income sources you have, but our pricing is transparent and fixed — no hidden costs.

What if my books are messy or behind?

We offer a clean-up service to fix historical data, bring everything up to date and set you up for a smooth monthly workflow.

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