18
years of experience
25,000
clients served
Finally —
a professional Self-Assessment service in the United Kingdom,
a professional Self-Assessment service in the United Kingdom,
We work with complex tax architectures
built for investors, company directors and clients with multi-income structures
Every return is handled exclusively by senior accountants, with a focus on strategic tax positioning, confidentiality and full legal compliance.
Turnaround time: 1–3 days, with same-day personal communication once your request is submitted.
TaxAce is a UK-regulated accountancy firm
— multiple income streams, property portfolios, investments, capital gains, dividends, foreign assets and cryptocurrency.
Request Your Strategic Tax Assessment
Please fill out the form below.
The more accurately you describe your situation, the more detailed a written analysis we will prepare.
The more accurately you describe your situation, the more detailed a written analysis we will prepare.
Why most self-employed professionals, investors and multi-income clients in the UK overpay tax
In the United Kingdom, more than half of Self-Assessment returns are submitted “as is” — with no analysis, no clarifying questions and no application of all available reliefs.
As a result, clients with complex financial structures lose hundreds — and often thousands — of pounds every year, simply because their return is processed as a standard case rather than a personalised tax architecture.
Even experienced accountants often rely on a minimal set of data, without reviewing:
📍 the structure of income streams,
📍 the nature of investments and capital gains,
📍 the specifics of crypto-transactions,
📍 nuances of foreign income,
📍 eligibility for reliefs, allowances and how they interact.
📍 the structure of income streams,
📍 the nature of investments and capital gains,
📍 the specifics of crypto-transactions,
📍 nuances of foreign income,
📍 eligibility for reliefs, allowances and how they interact.
We work exclusively on a full-assessment basis
The result — no overpayment, no risk, no uncertainty
We review, request and verify every component of your financial model:
Instead of “complex forms”, unexpected penalties or letters from HMRC, you receive:
• a correct and strategically structured return,
• full transparency,
• and confidence that you are paying exactly what the law requires — not a pound more.
• a correct and strategically structured return,
• full transparency,
• and confidence that you are paying exactly what the law requires — not a pound more.
freelance & consultancy income
property portfolios and rental activity
investments, capital gains, ISAs
crypto, staking, DeFi
dividends and director’s income
foreign assets and cross-border cases
Every return is handled exclusively by senior accountants, with a focus on strategic tax positioning, confidentiality and full legal compliance.
We build an accurate tax profile, apply all relevant reliefs,
and prepare your return within 1–3 working days, with a clear explanation of every element and a transparent breakdown for you.
and prepare your return within 1–3 working days, with a clear explanation of every element and a transparent breakdown for you.
25,000
accuracy, lawful tax efficiency and confidence that their tax position is structured correctly.
For 18 years in the United Kingdom, we have supported our clients — from self-employed professionals and consultants to landlords, investors, company directors and clients with complex tax structures.
clients
1,000
We submit over 1,000 Self-Assessment returns every year, and each one is processed exclusively by senior accountants.
Our clients differ in income levels, industries and long-term objectives.
Each has a unique financial architecture.
But the outcome is always the same:
Each has a unique financial architecture.
But the outcome is always the same:
Self-Assessment
Why even high-earning self-employed professionals, landlords and investors in the UK overpay tax
At TaxAce, we take a fully strategic approach.
— and often don’t realise it
The Self-Assessment system places full responsibility for accurate calculations on the individual.
And the more complex your income structure becomes — rental income, investments, dividends, crypto, foreign assets —
the higher the likelihood that valuable tax opportunities remain unused.
And the more complex your income structure becomes — rental income, investments, dividends, crypto, foreign assets —
the higher the likelihood that valuable tax opportunities remain unused.
And even experienced accountants frequently take a basic approach:
collect minimal information, enter the figures and submit the return without deeper analysis.
collect minimal information, enter the figures and submit the return without deeper analysis.
The issue is not with individuals.
The issue is that the standard Self-Assessment process is designed for reporting — not for a strategic understanding of your financial position.
The issue is that the standard Self-Assessment process is designed for reporting — not for a strategic understanding of your financial position.
We treat your return as a part of your overall tax architecture —
not as a standalone form that needs to be completed.
not as a standalone form that needs to be completed.
As a result, many clients effectively overpay tax, miss legitimate opportunities for optimisation, or receive avoidable queries from HMRC.
🔬 Studies in the UK show that a significant proportion of Self-Assessment returns are submitted with errors or incomplete data — simply because interactions between income streams, capital gains, crypto activity, rental expenses, annual limits or foreign income nuances were not taken into account.
Most taxpayers are not expected to be experts in dozens of rules, limits, reliefs and exemptions.
The core issue isn’t people — it’s the tax infrastructure itself
Self-Assessment is a system where the government transfers full responsibility for accurate calculations to the taxpayer.
And this works as long as an individual has one simple, stable source of income.
But once the financial picture becomes more complex — rental income, investments, capital gains, crypto activity, foreign accounts —
the standard model simply stops functioning.
And this works as long as an individual has one simple, stable source of income.
But once the financial picture becomes more complex — rental income, investments, capital gains, crypto activity, foreign accounts —
the standard model simply stops functioning.
36%
contain errors, omissions or incorrect calculations
Among self-employed individuals and clients with mixed income streams, the rate is even higher —
because the system doesn’t account for the complexity of their financial structure.
Among self-employed individuals and clients with mixed income streams, the rate is even higher —
because the system doesn’t account for the complexity of their financial structure.
of Self-Assessment returns
£9.8
According to HMRC (2023–2024), the Self-Assessment tax gap reached £9.8 billion —
the amount of underpaid, overpaid or miscalculated tax across the UK.
And this isn’t caused by fraud.
the amount of underpaid, overpaid or miscalculated tax across the UK.
And this isn’t caused by fraud.
In recent years, the market has been flooded with online platforms and “old-school” accountancy firms that operate on a data in → return out model.
They don’t analyse income structure, compare scenarios
or evaluate whether a client qualifies for various combinations of reliefs and allowances — because this requires individual work and advanced expertise.
As a result, clients with investments, crypto, property portfolios or dividends receive returns processed as standard cases, with no in-depth review and no tax optimisation.
They don’t analyse income structure, compare scenarios
or evaluate whether a client qualifies for various combinations of reliefs and allowances — because this requires individual work and advanced expertise.
As a result, clients with investments, crypto, property portfolios or dividends receive returns processed as standard cases, with no in-depth review and no tax optimisation.
🔬 Research by NatCen Social Research confirms:
most people make mistakes unintentionally, simply because the system expects them to act as tax specialists.
most people make mistakes unintentionally, simply because the system expects them to act as tax specialists.
We treat Self-Assessment as part of your overall tax strategy, not as routine reporting.
Every case is handled by senior specialists, who analyse the full structure of your income and expenses, review the applicability of every relief,
and prepare the return as a personalised, high-precision tax document — not a default submission.
Every case is handled by senior specialists, who analyse the full structure of your income and expenses, review the applicability of every relief,
and prepare the return as a personalised, high-precision tax document — not a default submission.
billion
— which guarantees accuracy, transparency and full compliance with UK tax regulations.
Why thousands of clients across the United Kingdom choose TaxAce for their Self-Assessment returns
📌 Throughout our work, we have served over 25,000 clients
and prepare more than 1,000 Self-Assessment returns every year, including cases involving investments, property portfolios, cryptocurrency, capital gains and foreign income.
and prepare more than 1,000 Self-Assessment returns every year, including cases involving investments, property portfolios, cryptocurrency, capital gains and foreign income.
🥇TaxAce ranked #1 in the official “Top 10 Best Accounting Firms in London” by London Business News.
⭐ With over 1,200 five-star Google reviews, TaxAce holds the highest volume of 5★ feedback of any accounting firm in the UK.
These results reflect the consistent quality of our work,
attention to detail and our ability to handle cases of any complexity.
🙌 We also support charitable initiatives — MAD AID, Make-A-Wish Foundation and Octavia Foundation — because we believe that the financial success of our clients should create value not only for them, but for the wider community.
These results reflect the consistent quality of our work,
attention to detail and our ability to handle cases of any complexity.
🙌 We also support charitable initiatives — MAD AID, Make-A-Wish Foundation and Octavia Foundation — because we believe that the financial success of our clients should create value not only for them, but for the wider community.
We are accredited as a Tax-Registered Agent and certified by leading industry bodies — AAT, Xero and Dext
Over 18 years in the UK, we have built one of the most reliable and established tax practices, supporting Self-Assessment for clients with complex financial structures —
from private professionals to investors, landlords and portfolio owners.
from private professionals to investors, landlords and portfolio owners.
How the process works with TaxAce
The outcome
— a clear, transparent workflow from your initial request to final submission.
We have structured our process so that every stage is clear, predictable
and fully aligned with HMRC requirements.
There is no need to schedule calls — everything begins with your request for a written Strategic Tax Assessment.
and fully aligned with HMRC requirements.
There is no need to schedule calls — everything begins with your request for a written Strategic Tax Assessment.
A structured process, precise calculations and confidence in the correctness of your return —
with minimal time required from you.
with minimal time required from you.
You submit your request and describe your situation
In the form, you indicate your income sources (freelance/consulting, property rental, investments, dividends, capital gains, cryptocurrency, foreign income) and briefly outline your tax objectives.
📌 This information enables us to conduct an initial written assessment without calls or delays.
📌 This information enables us to conduct an initial written assessment without calls or delays.
Preparation of your Self-Assessment return
Once the documents are provided, we carry out a comprehensive analysis:
review all income sources, assess the specifics of relevant tax regimes and apply the appropriate reliefs and optimisation mechanisms.
🕑 Preparation takes 1–3 working days.
📌 You receive your return together with a clear explanation of key calculations and a transparent breakdown of your tax position.
review all income sources, assess the specifics of relevant tax regimes and apply the appropriate reliefs and optimisation mechanisms.
🕑 Preparation takes 1–3 working days.
📌 You receive your return together with a clear explanation of key calculations and a transparent breakdown of your tax position.
Submission and full HMRC correspondence
We submit your return on your behalf and manage all communication with HMRC:
confirmations, clarifications, requests and compliance checks.
📌 Our track record: 100% successful submissions.
confirmations, clarifications, requests and compliance checks.
📌 Our track record: 100% successful submissions.
We review your data and prepare a tailored written response
Based on the information you provide, we determine:
• which tax elements interact in your case;
• which reliefs and allowances may apply;
• which documents are required for an accurate calculation.
📌 You receive a detailed email with an individual document checklist and the next recommended steps.
• which tax elements interact in your case;
• which reliefs and allowances may apply;
• which documents are required for an accurate calculation.
📌 You receive a detailed email with an individual document checklist and the next recommended steps.
It’s time to ensure your Self-Assessment truly works in your favour
⚠️ We accept a limited number of new assessment requests each week to maintain the highest analytical standard.
Only 5 assessment slots are available over the next few days.
Only 5 assessment slots are available over the next few days.
If you have a complex financial structure —consulting/freelance income, property rental, investments, capital gains, cryptocurrency, foreign income — and your annual income exceeds £50,000, please complete the form and describe your situation in detail.
📍 This is a required step for an accurate assessment.
📍 This is a required step for an accurate assessment.
Request your Strategic Tax Assessment —
a personalised written analysis of your situation, based on the information you provide in the form.
✉️ Once your request is submitted, you will receive
a detailed email response where we assess:
✏️ the structure of your income,
✏️ identify potential optimisation areas within Self-Assessment,
✏️ and outline the next recommended steps.
a detailed email response where we assess:
✏️ the structure of your income,
✏️ identify potential optimisation areas within Self-Assessment,
✏️ and outline the next recommended steps.
FAQ
It’s possible, but HMRC research shows that a significant share of Self-Assessment returns contain errors or incomplete information — especially when multiple income streams, investments, rental activity, capital gains or crypto transactions are involved.
We do far more than simply submit a form.
We analyse your income structure, assess eligibility for reliefs and identify optimisation opportunities, so your return is calculated correctly and in your favour.
We do far more than simply submit a form.
We analyse your income structure, assess eligibility for reliefs and identify optimisation opportunities, so your return is calculated correctly and in your favour.
It depends on the complexity of your financial structure.
In most cases, preparation takes 1–3 working days once all required data is provided.
In most cases, preparation takes 1–3 working days once all required data is provided.
Only basic information about your income sources and a detailed description of your situation in the form.
We clarify all additional details ourselves — investments, rental activity, dividends, capital gains, cryptocurrency, foreign income and other relevant aspects.
After your request, you will receive a personalised written checklist
to help you gather the necessary documents quickly and easily.
We clarify all additional details ourselves — investments, rental activity, dividends, capital gains, cryptocurrency, foreign income and other relevant aspects.
After your request, you will receive a personalised written checklist
to help you gather the necessary documents quickly and easily.
Many clients come to us specifically for a second opinion.
When reviewing previously submitted returns, we often identify missed deductions,
unused reliefs or incorrectly structured data.
Whether you remain with your current accountant or move to us is entirely up to you.
We simply provide an objective and professional assessment.
When reviewing previously submitted returns, we often identify missed deductions,
unused reliefs or incorrectly structured data.
Whether you remain with your current accountant or move to us is entirely up to you.
We simply provide an objective and professional assessment.
Yes.
We handle cases involving crypto-income, staking, DeFi activity, investments, rental income, capital gains and foreign income sources.
All work is performed strictly in line with HMRC requirements.
We handle cases involving crypto-income, staking, DeFi activity, investments, rental income, capital gains and foreign income sources.
All work is performed strictly in line with HMRC requirements.
We are an HMRC-Registered Agent, fully compliant with GDPR,
use secure data-transfer channels and provide access only to the specialists
who are working directly on your return.
We do not share your information with third parties.
use secure data-transfer channels and provide access only to the specialists
who are working directly on your return.
We do not share your information with third parties.
The price depends on the complexity of your case:
• from £200 — standard Self-Assessment returns;
• around £500 — multi-income cases (rental, dividends, investments, combined sources);
• up to £1,200 — crypto, capital gains, foreign income and other advanced scenarios.
All fees are confirmed upfront.
No hidden charges — only a clear and transparent structure.
• from £200 — standard Self-Assessment returns;
• around £500 — multi-income cases (rental, dividends, investments, combined sources);
• up to £1,200 — crypto, capital gains, foreign income and other advanced scenarios.
All fees are confirmed upfront.
No hidden charges — only a clear and transparent structure.
No unnecessary formalities.
Just professional handling and predictable results.
Just professional handling and predictable results.
That’s it.
We’ve outlined exactly how TaxAce works — from analysing your income structure to managing communication with HMRC — and how we support clients with complex financial architectures.
🔔 If your tax situation involves multiple income sources —
consulting/freelance, property rental, investments, capital gains, cryptocurrency, foreign income —
and your annual income exceeds £50,000, you can request a Strategic Tax Assessment.
Once you submit the form, you will receive:
📝 a personalised written assessment based on the information you provide.
We will review your tax position, highlight key optimisation opportunities and outline the next steps.
If our approaches align,
we will move forward with ongoing support for your tax strategy — structured, transparent and fully compliant with HMRC requirements.
We’ve outlined exactly how TaxAce works — from analysing your income structure to managing communication with HMRC — and how we support clients with complex financial architectures.
🔔 If your tax situation involves multiple income sources —
consulting/freelance, property rental, investments, capital gains, cryptocurrency, foreign income —
and your annual income exceeds £50,000, you can request a Strategic Tax Assessment.
Once you submit the form, you will receive:
📝 a personalised written assessment based on the information you provide.
We will review your tax position, highlight key optimisation opportunities and outline the next steps.
If our approaches align,
we will move forward with ongoing support for your tax strategy — structured, transparent and fully compliant with HMRC requirements.
