When is the self-assessment deadline?

The online self-assessment deadline is 31 January following the end of the tax year. For paper returns, the deadline is 31 October. Late filing incurs automatic penalties starting at £100.

Do I need an accountant for self-assessment?

While you can file yourself, an accountant can help ensure you claim all eligible expenses, avoid errors, and potentially reduce your tax bill. For complex situations, professional help is strongly recommended.

How much does a self-assessment tax return cost?

A straightforward self-assessment return typically costs £150–£400. More complex returns involving property income, foreign income, or capital gains may cost £300–£800.

Self Assessment Accountants

Personal tax returns for individuals and sole traders

What do self assessment accountants help with?

Self Assessment accountants help businesses handle a specific accounting, tax, or compliance need with clearer records, deadlines, and responsibilities. Compare firms by looking at the type of work they handle, the software they support, how they communicate during the year, and whether they provide useful explanations as well as filing or processing support. A good shortlist should also consider sector experience, response time, remote working, pricing structure, and whether the accountant can connect this service with wider advice such as cash flow, tax planning, or management accounts. Before enquiring, prepare your current records, software access, deadlines, business type, turnover pattern, and the outcome you want. That gives each firm enough context to explain the right service level and quote more accurately. FindAccountants.uk helps users compare Self Assessment accountants by profile evidence, service fit, location, trust signals, and contact options before choosing who to approach.

How to compare self assessment accountants

Use these criteria before contacting firms, then confirm scope directly with the accountant.

Service fit	Does the firm regularly handle this exact type of accounting work?
Client fit	Does the firm work with your business type, sector, size, or income mix?
Software fit	Can the accountant work with your current accounting, payroll, or bookkeeping tools?
Response expectations	Will you know who handles questions, deadlines, and year-round communication?
Pricing and scope	Are fees, included work, exclusions, and extra advisory charges explained clearly?
Trust signals	Can you review qualifications, verification information, reviews, and profile detail before enquiring?

What to prepare

Sharing better context usually leads to clearer replies and more accurate quotes.

Income sources
Expense evidence
Pension and gift aid details
Property or investment income
Filing deadline

Request a self assessment accountant quote

12 firms offering Self Assessment

Northern Bean Counters VerifiedFeatured

4.8(89)

·Manchester (Remote)·Within 4 hours·12+ yrs

Manchester's most trusted accountancy firm for contractors and freelancers. Transparent pricing, fast turnaround.

Contractor AccountingSelf AssessmentTax Returns+8 moreMonthly subscription

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Clarity Accounting Verified

4.7(64)

·Birmingham (Remote)·Same day·8+ yrs

Birmingham-based chartered accountants offering clear, jargon-free advice to small businesses and landlords.

Self AssessmentTax ReturnsBookkeeping+9 moreFixed fee packages

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Keystone Accounting Verified

4.5(38)

·Liverpool (Remote)·Same day·5+ yrs

Affordable, reliable accounting for sole traders and micro-businesses in Liverpool.

Self AssessmentTax ReturnsBookkeeping+6 moreMonthly subscription

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Greenfield & Partners VerifiedFeatured

4.7(92)

·London, Brighton (Remote)·Within 2 hours·15+ yrs

London's premier landlord and property tax specialists. Over 1,500 property investors trust us.

Landlord TaxSelf AssessmentTax Returns+6 moreFixed fee packages

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PixelBooks Verified

4.6(45)

·Sheffield (Remote)·Within 4 hours·4+ yrs

Online-first accounting practice built for ecommerce sellers on Amazon, Shopify, and eBay.

Ecommerce AccountingVATBookkeeping+5 moreMonthly subscription

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Oak Tree Accountants

4.4(33)

·Nottingham·Within 24 hours·7+ yrs

Friendly, approachable accountants in Nottingham helping small businesses stay on top of their finances.

Self AssessmentTax ReturnsBookkeeping+7 moreHourly rates

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Latitude Tax Verified

4.9(34)

·Cambridge (Remote)·Within 4 hours·9+ yrs

Boutique tax advisory firm in Cambridge specialising in owner-managed businesses and personal tax planning.

Tax ReturnsSelf AssessmentCorporation Tax+6 moreFixed fee packages

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Spire Accountants

4.3(22)

·Oxford (Remote)·Within 24 hours·3+ yrs

Oxford-based practice offering affordable accounting for students, academics, and small businesses.

Self AssessmentTax ReturnsBookkeeping+5 moreMonthly subscription

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Thames Tax Group Verified

4.5(41)

·Reading (Remote)·Within 4 hours·11+ yrs

Reading-based firm with a specialist contractor and IR35 compliance team.

Contractor AccountingTax ReturnsCorporation Tax+7 moreMonthly subscription

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Pennine Accounting Solutions Verified

4.6(29)

·Sheffield·Within 24 hours·16+ yrs

Sheffield practice helping construction and trade businesses with compliance and tax planning.

Tax ReturnsVATBookkeeping+6 moreFixed fee packages

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Broads Chartered Accountants Verified

4.5(36)

·Cambridge·Within 24 hours·32+ yrs

East Anglian firm with deep agricultural and rural business expertise.

Tax ReturnsSelf AssessmentYear-End Accounts+6 moreHourly rates

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Metro Accounts Verified

4.6(47)

·Leeds (Remote)·Same day·9+ yrs

Leeds-based practice providing multilingual accounting services to diverse communities.

Self AssessmentTax ReturnsBookkeeping+9 moreFixed fee packages

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Top cities for Self Assessment

Self Assessment in London

487 firms

Self Assessment in Manchester

156 firms

Self Assessment in Birmingham

134 firms

Self Assessment in Leeds

98 firms

Self Assessment in Bristol

87 firms

Self Assessment in Edinburgh

76 firms

Self Assessment in Glasgow

72 firms

Self Assessment in Liverpool

65 firms

Frequently asked questions

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What do self assessment accountants help with?

Service fit

Does the firm regularly handle this exact type of accounting work?

Client fit

Does the firm work with your business type, sector, size, or income mix?

Software fit

Can the accountant work with your current accounting, payroll, or bookkeeping tools?

Response expectations

Will you know who handles questions, deadlines, and year-round communication?

Pricing and scope

Are fees, included work, exclusions, and extra advisory charges explained clearly?

Trust signals

Can you review qualifications, verification information, reviews, and profile detail before enquiring?