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Self-assessment tax estimator
A starting point for income tax and national insurance planning.
Estimates only
Self-Assessment
Tax returns filed accurately and on time
Personal service that applies the right reliefs, keeps you ahead of deadlines, and explains your bill in plain language.
Overview
Avoid penalties, use the right reliefs, and know your tax position early
We handle the calculations, apply allowances correctly, and submit digitally to HMRC. You receive reminders well before 31 January and clarity on what to pay and when.
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Deadline management
31 January filing and 31 July payments diarised with reminders so you avoid penalties.
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Accurate calculations
Allowable expenses and reliefs applied correctly to keep your liability fair.
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Digital submissions
HMRC-compliant filing with proof of submission and copies for your records.
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Support for complex cases
Property income, dividends, capital gains, and multiple income streams handled confidently.
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Clarity before payment
We review the figures with you so you know exactly what you owe and why.
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Year-round questions
Ask tax questions anytime—no need to wait until the next return.
Who this is for
Individuals who want peace of mind and fewer tax surprises
Ideal if you want your return handled end-to-end, with quick access to answers during the year.
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Sole traders and freelancers who want returns filed correctly the first time.
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Directors needing to declare dividends and benefits without surprises.
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Individuals with property income or multiple revenue streams who need clarity.
Tools & Guides
Resources to help you plan
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Guide
Self-assessment checklist
Keep your return accurate with a simple checklist of the key inputs.
PDF download
Related services
Many clients also need
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Bookkeeping
Keep records tidy so your return is simple and accurate.
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VAT
Stay compliant if you cross thresholds or register voluntarily.
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Cashflow
Plan for payments on account and future tax bills.
Cool Cat Stories
Stories that might feel familiar
Short, calm stories that mirror what clients often feel before they get support.
Cool Cat Story
The Avoider Cat
The Avoider Cat and the Quiet VAT Drawer
A story about what happens when VAT and HMRC letters quietly stack up.
VAT HMRC Avoider
Deadline coming up?
Let us file your return with time to spare
Share your documents and we will handle the calculation, filing, and confirmation. Clear updates at every step.