Self Assessment Accountant Cost: What You’ll Actually Pay in 2026
Ask five accountants what a Self Assessment tax return costs and you’ll likely get five different answers — and all of them could be correct. Fees genuinely swing based on how tidy your records are, how many income sources you’re juggling, and even which part of the country you’re in. Without a benchmark to compare against, it’s easy to either overpay for a simple return or underpay for something that needed proper attention.
This guide breaks down what UK Self Assessment accountants actually charge in 2026, what pushes a quote up or down, and how to tell whether a fee is fair before you commit. It draws on how we price this exact service day to day, alongside what other UK practices are currently charging.
Quick Answer
A Self Assessment accountant in the UK typically charges between £150 and £400 plus VAT for a standard personal tax return, with straightforward employed or single-income cases at the lower end and landlord, director, or multi-income returns pushing toward £400–£600. Central London firms generally charge 20–30% more than the UK average. Most reputable accountants now quote a fixed fee agreed upfront rather than billing by the hour.
Key Takeaways
- Expect to pay roughly £150–£400 + VAT for a standard Self Assessment return, rising to £400–£600+ for more complex affairs.
- Fixed-fee pricing is now the norm — agreed before work starts, so there are no surprise bills later.
- Location matters: Central London practices typically charge 20–30% above the rest of the UK.
- Landlords are often charged a small extra fee per rental property, on top of the base return price.
- Filing close to the 31 January deadline can push the price up, since accountants often charge a premium for rushed work.
- The quality of your records has as much impact on price as the complexity of your income — messy records mean more billable time.
Table of Contents
- What Does a Self Assessment Accountant Actually Do for the Fee?
- Typical Self Assessment Accountant Costs by Client Type
- What Pushes the Price Up or Down?
- Fixed Fee vs Hourly Rate: Which Is Better?
- Regional Price Differences Across the UK
- Hidden or Additional Costs to Watch For
- Is It Worth Paying for an Accountant, or Should You DIY?
- Self Assessment Accountant Costs for London Clients
- Common Mistakes People Make
- Accountant Insights: What We See in Practice
- How to Get a Fair Quote (Decision Framework)
- Cheap vs Mid-Range vs Premium Accountant (Comparison)
- Checklists
- FAQs
- Sources
- Final Thoughts
What Does a Self Assessment Accountant Actually Do for the Fee?
The fee isn’t just for typing numbers into a form. A properly run Self Assessment service generally includes:
- Reviewing your income and expenses for accuracy and completeness
- Identifying allowable expenses and reliefs you might not know to claim
- Calculating your tax liability, including any payments on account due
- Preparing the return and sending you a summary to approve before filing
- Submitting the return directly to HMRC as your authorised agent
- Being available to answer questions about the figures before and after filing
The exact scope varies between providers, so it’s worth confirming precisely what’s included in a quoted price before comparing it against another firm’s — a £150 quote that excludes queries and a £250 quote that includes ongoing support aren’t really the same service.
Typical Self Assessment Accountant Costs by Client Type
Based on current UK market pricing, here’s roughly what different clients tend to pay:
| Client Type | Typical Fee Range (+ VAT) |
|---|---|
| Simple employed return (e.g. Child Benefit charge, crossing £100,000) | £150 – £250 |
| Sole trader / self-employed, single income stream | £150 – £350 |
| Landlord with one property | £180 – £350, plus roughly £30 per additional property |
| Limited company director (personal return only) | £150 – £300, often bundled into a company package |
| Multiple income sources (self-employment + rental + dividends) | £350 – £600 |
| Partnership return (per partner) | £300 base, plus roughly £100–£150 per additional partner |
These ranges reflect the wider UK market rather than any single provider, and figures shift year to year — always confirm current pricing directly with whichever accountant you’re considering.
What Pushes the Price Up or Down?
Five factors reliably move the final fee, sometimes by £50–£200 or more:
- Income complexity: A single PAYE income is far quicker to process than self-employment, rental income, dividends, and capital gains combined.
- Record quality: Clean digital records from software like Xero or QuickBooks take far less time to work through than a shoebox of paper receipts.
- Location: Central London and parts of the South East generally carry higher overheads, which is reflected in the quote.
- Timing: Filing well before the January rush usually costs less than a last-minute submission, which some accountants price as a rush job.
- Bookkeeping needs: If your records need tidying up before a return can even be prepared, that’s typically billed separately from the return itself.
Accountant Insight: The single biggest cost driver we see isn’t income complexity — it’s record quality. A self-employed client with tidy digital bookkeeping and one income stream can genuinely cost less to process than an employed client who arrives with a carrier bag of unsorted paperwork.
Fixed Fee vs Hourly Rate: Which Is Better?
Most UK accountants now quote Self Assessment work as a fixed fee rather than an hourly rate, and for good reason. A fixed fee means you know the total cost before any work begins, with no surprise bill if your accountant spends longer than expected untangling your figures. Hourly billing can occasionally work out cheaper for an extremely simple return, but it also carries the risk of an open-ended final invoice — especially if your records turn out messier than you thought.
For most people, a clear fixed-fee quote agreed in writing before work starts is the safer and more predictable option.
Regional Price Differences Across the UK
Where your accountant is based (or where they primarily serve) has a measurable effect on price:
| Region | Typical Fee Range (+ VAT) |
|---|---|
| Central London | £250 – £450 |
| Rest of England | £150 – £400 |
| Scotland | £150 – £350 |
| Wales and Northern Ireland | £150 – £300 |
Because most Self Assessment work is now handled remotely, you’re not restricted to accountants in your immediate area — a firm based outside Central London can often complete identical work for a noticeably lower fee.
Hidden or Additional Costs to Watch For
A quote that looks cheap on paper can end up costing more once extras are added. Common add-ons to ask about upfront include:
- Bookkeeping or record-tidying, if your figures aren’t already organised
- Additional rental properties, usually charged per property beyond the first
- Capital gains calculations, particularly for property or share disposals
- Late or rushed filing, which some firms price at a premium closer to the deadline
- Correspondence with HMRC beyond the initial filing, such as responding to a query or enquiry
Ask specifically what triggers an extra charge before you sign up — a genuinely fixed fee should not change once your documents have been reviewed and the scope confirmed.
Is It Worth Paying for an Accountant, or Should You DIY?
Filing your own Self Assessment return through GOV.UK is free, and for a very simple, single-income situation it can be entirely manageable. Where an accountant’s fee tends to pay for itself is in the reliefs and expenses people miss when filing alone — a landlord who doesn’t realise certain repairs are deductible, or a self-employed person who underclaims mileage, can easily lose more in unclaimed relief than the accountant’s fee would have cost.
Illustrative Example: A self-employed tradesperson filing their own return for several years switched to an accountant and had over £2,000 in previously unclaimed expenses identified in the first year alone — several times more than the accountant’s fee.
One-Off Filing vs a Year-Round Accountant
Not every Self Assessment fee buys the same kind of relationship. Some accountants offer a purely transactional, once-a-year service: you send your figures in January, they file the return, and that’s the end of the engagement until next year. Others price Self Assessment as part of a broader, ongoing relationship that includes tax planning, quarterly check-ins, and advice throughout the year.
A one-off service is usually cheaper on paper and suits people with simple, stable finances who don’t need advice outside of filing season. A year-round relationship costs more but tends to pay off for anyone whose situation is changing — starting a side business, buying a second property, or approaching a tax threshold — since planning ahead of the year-end is where real tax savings usually come from, rather than reacting to figures after the fact.
When comparing quotes, it’s worth asking directly whether the price is for filing alone, or whether it includes any proactive advice during the year — the answer often explains a meaningful chunk of the price difference between two otherwise similar-looking quotes.
Self Assessment Accountant Costs for London Clients
London consistently sits at the higher end of the UK’s Self Assessment pricing — Central London practices typically charge 20–30% more than firms elsewhere in the country, reflecting higher office costs and demand. That said, because most Self Assessment work is now delivered remotely, London-based clients aren’t limited to paying London prices; a fully qualified accountant based outside the capital can complete the same standard of work for a lower fee, without any need for an in-person meeting.
For London’s large population of contractors, freelancers, and landlords with buy-to-let property in the capital, the return is also more likely to involve multiple income streams — which is where price comparisons need to be like-for-like. A £180 quote for a simple single-income return and a £350 quote for a landlord with two properties and freelance income aren’t really comparable, even though the second figure looks higher at a glance.
Common Mistakes People Make
1. Comparing quotes without checking what’s included
Why it happens: The headline price is the easiest thing to compare at a glance.
Consequence: A cheaper quote that excludes queries, corrections, or a second income source can end up costing more once extras are added.
How to avoid it: Ask exactly what’s covered in the fee before comparing it against another provider’s.
2. Leaving it until January to get a quote
Why it happens: Tax admin is easy to put off until the deadline is close.
Consequence: Many accountants charge a premium for rushed, late-season work, and availability can be limited.
How to avoid it: Get a quote and start the process as soon as the tax year ends in April.
3. Assuming the cheapest option is automatically the best value
Why it happens: Price is the most visible signal of value when comparing services.
Consequence: A very low fee sometimes means a lighter-touch review that misses expenses or reliefs you were entitled to claim.
How to avoid it: Weigh the fee against what a thorough review might identify in missed relief, not just the sticker price.
4. Not asking about extra charges for additional income sources
Why it happens: People assume the quoted fee covers their full situation.
Consequence: A landlord with two properties or a director with dividends may be quoted a base price that doesn’t reflect their actual complexity.
How to avoid it: Describe your full income picture upfront so the quote reflects the real scope of work.
5. Paying twice for the same work
Why it happens: A limited company director sometimes books a separate “Self Assessment only” service alongside their existing company accountant.
Consequence: The personal return is often already covered within a standard company accounting package, so a separate booking can mean paying for the same work twice.
How to avoid it: Check with your existing company accountant before booking a standalone Self Assessment service.
Accountant Insights: What We See in Practice
- Fixed-fee clients are consistently happier than hourly-billed ones — knowing the total cost upfront removes a lot of the anxiety around tax season.
- Digital records genuinely lower the fee — clients using accounting software rather than paper receipts routinely receive lower quotes, because the review takes noticeably less time.
- Landlords are the group most likely to be quoted inconsistently between providers, since per-property charges vary significantly and aren’t always disclosed upfront.
- Company directors frequently overpay by booking a standalone personal return service when their company accountant already includes it.
- Early filers tend to get better value — not just a lower fee, but more time for the accountant to query anything unusual before the deadline pressure sets in.
How to Get a Fair Quote
A simple framework for comparing accountants:
Step 1: Describe your full income picture upfront.
Don’t leave out a second income source or a rental property — an accurate quote depends on the accountant knowing your real situation.
Step 2: Ask exactly what’s included.
Confirm whether queries, corrections, and HMRC correspondence are part of the fee or billed separately.
Step 3: Get it in writing as a fixed fee.
A written quote protects you from a surprise final bill.
Step 4: Compare like-for-like scope, not just the headline number.
A £180 quote and a £350 quote may be covering genuinely different amounts of work.
Cheap vs Mid-Range vs Premium Accountant
| Tier | Typical Fee | What You Usually Get | Best For |
|---|---|---|---|
| Budget | £100 – £180 | Basic return preparation and filing, limited query support | Very simple, single-income situations |
| Mid-range | £180 – £350 | Full review, relief identification, dedicated accountant, query support | Most sole traders, landlords, and directors |
| Premium | £350 – £600+ | Complex multi-income handling, proactive tax planning, faster turnaround | Multiple income sources, higher earners, complex affairs |
Checklists
Checklist 1: Before You Request a Quote
- ✓ List every income source (employment, self-employment, rental, dividends, etc.)
- ✓ Note how many rental properties, if any
- ✓ Check whether your records are digital or paper-based
- ✓ Decide whether you want ongoing support or a one-off filing
- ✓ Ask each provider the same set of questions for a fair comparison
Checklist 2: Questions to Ask Before Booking
- ✓ Is this a fixed fee, and does it cover queries after filing?
- ✓ What would trigger an additional charge?
- ✓ Are you registered with HMRC as an authorised agent?
- ✓ What qualification do you hold (ACCA, ACA, ATT, CIMA)?
- ✓ How is my data stored and protected?
FAQs
How much does a Self Assessment accountant cost in the UK?
Typically £150–£400 plus VAT for a standard return, rising to £400–£600 or more for landlords, directors, or multiple income sources.
Is a Self Assessment accountant worth the cost?
Often yes — accountants regularly identify missed expenses or reliefs worth more than their fee, particularly for landlords and the self-employed.
Do accountants charge more for Self Assessment in London?
Yes, Central London firms typically charge 20–30% more than the UK average, though remote services mean London clients aren’t limited to local pricing.
Is it cheaper to file my own Self Assessment return?
Filing yourself is free, and can work well for a simple single-income situation, but the risk of missed reliefs can outweigh the saving for more complex affairs.
Do landlords pay more for a Self Assessment accountant?
Generally yes — an extra fee, often around £30 per additional property, is common on top of the base return price.
What’s included in a typical Self Assessment accountant fee?
Usually the review of your income and expenses, identification of allowable reliefs, preparation and filing of the return, and a level of query support — though exact scope varies by provider.
Why do accountant fees vary so much between firms?
Location, income complexity, record quality, timing, and what’s included in the service (such as bookkeeping or year-round support) all affect the final price.
Is a fixed fee better than an hourly rate for Self Assessment?
For most people, yes — a fixed fee agreed upfront avoids the risk of an unexpectedly large bill if the work takes longer than expected.
Should limited company directors pay separately for a personal Self Assessment return?
Not always necessary — many company accounting packages already include the director’s personal return, so it’s worth checking before booking a separate service.
Does filing close to the deadline cost more?
Often, yes — some accountants charge a premium for last-minute work due to the pressure of the 31 January deadline.
Sources
- HMRC / GOV.UK — Self Assessment tax returns
- ICAEW — Find a Chartered Accountant
- ACCA — Choosing an accountant
- Industry fee surveys and published UK accountancy pricing pages (2026)
Fee ranges reflect general UK market pricing at the time of writing and vary by provider — always confirm a current, written quote before committing to a service.
Final Thoughts
Self Assessment accountant fees vary for genuine reasons — complexity, record quality, location, and timing all play a real part. The key to getting fair value isn’t necessarily finding the cheapest quote, but understanding exactly what’s included, describing your full situation upfront, and comparing like-for-like scope between providers.
If you’re not sure what your own return would realistically cost, getting a clear, written quote based on your actual circumstances is the fastest way to find out — and to see whether the fee is likely to pay for itself in reliefs you might otherwise miss.
Written by:
Shamayun Chowdhury
Senior Accountant, Major Accountancy
Lecturer in Accounting, Nottingham Trent University
CIMA Qualified, 15+ Years Experience
Last Reviewed: August 2026