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How business tax services work

Corporation tax is charged on company profits, with a small profits rate for lower earners and marginal relief between the thresholds.

The bigger opportunities usually sit outside the return itself: capital allowances on equipment, R&D relief, loss planning and how directors take money out of the business.

Payment is due nine months and one day after your accounting period ends, with the return itself due twelve months after.

Accountant reviewing corporation tax figures

What affects the cost of business tax services

  • Profit level and which rate band applies
  • Capital expenditure and allowance claims
  • Whether R&D or creative reliefs are available
  • Group structure and loss relief
  • Salary versus dividend profit extraction

Why get in touch about business tax services with us

Full relief review

Allowances and reliefs checked before the return is finalised.

Extraction planning

The right salary and dividend mix for directors and shareholders.

Deadline control

Payment and filing dates tracked so interest is never incurred.

Contact us about business tax

Business tax services compared

Typical UK fees for owner-managed companies.

ServiceTypical feeFrequencyBest for
CT600 only£300 - £700AnnualSimple companies
Accounts + CT600£800 - £2,000AnnualMost SMEs
Tax planning review£400 - £1,200AnnualProfitable companies
R&D claim10 - 20% of benefitPer claimTechnical development work

Corporation tax rates

Rates for the current UK financial year.

Profit bandRateNotes
Up to £50,00019%Small profits rate
£50,001 - £250,00026.5% effectiveMarginal relief applies
Over £250,00025%Main rate
Payment deadline9 months + 1 dayAfter period end

Expert advice

Our finance team reviews UK providers, pricing tiers and service levels every quarter.

Compliance tells you what happened. Planning changes what happens. Buy the second one before your year end, not after.

business tax services: pros and cons

Pros

  • Reliefs identified before the numbers are locked in
  • Lower effective tax rate through legitimate planning
  • Reduced risk of an HMRC enquiry
  • Clear forecast of what to set aside

Cons

  • Planning advice costs more than compliance alone
  • R&D claims attract HMRC scrutiny and need robust evidence
  • Benefit depends on profit level

How to choose business tax services

The cheapest headline price is rarely the cheapest total cost. Work through these points before you commit.

  1. 1

    Book the review before year end

    Once the period closes, most planning options are gone.

  2. 2

    Watch the marginal band

    Profits between £50,000 and £250,000 face a 26.5% effective rate — timing matters.

  3. 3

    Vet R&D advisers carefully

    Contingent-fee firms that overclaim leave you carrying the risk.

  4. 4

    Review extraction annually

    The optimal salary and dividend split changes with each Budget.

Get in touch about business tax services

Tell us what your business needs today. It takes just minutes.

Get in touch

Getting help with business tax services

It takes a few minutes to get in touch, and there is no obligation.

1. Tell us about your business

Turnover, structure, headcount and how many transactions you process each month.

2. Get matched with a specialist

We put you in touch with a provider that genuinely supports businesses of your size and sector.

3. Understand the real costs

Monthly fees, per-user charges, onboarding costs and what is bundled versus billed extra.

4. Get set up

Your chosen provider handles onboarding, data migration and HMRC registrations where needed.

Find out more about how it works

Things to watch out for

Corporation tax is payable before the return is due — set the cash aside early.

Overdrawn director loan accounts trigger a separate s455 tax charge.

Aggressive schemes marketed as tax planning can end in penalties and interest.

Our business tax services service

We put you in touch with established UK providers and independent practices for business tax services, so you can weigh price against the level of support you actually get.

There is no fee to get in touch, and we will tell you plainly when your existing arrangement is already competitive.

Business finance documents and a laptop on a desk

Getting started

1

Gather your numbers

Latest accounts, current provider costs and your accounting year end.

2

Check the transfer

Confirm how records, payroll history and HMRC authorisations move across.

3

Set the go-live date

Most businesses switch at a quarter or year end to keep reporting clean.

Why choose Grow Your Business?

Specialists, not generalists

We put you in touch with UK specialists who actually fit how your business operates.

No cost to enquire

There's no fee to get in touch, and no obligation to go ahead once you hear back.

Simple and fast

It takes just a few minutes to send your enquiry, and a specialist will be in touch shortly after.

Types of business tax services

Different setups suit different stages of growth.

Compliance only

Corporation tax computation and CT600 prepared and filed.

Compliance plus planning

Adds a pre-year-end review to influence the outcome, not just report it.

R&D tax credit claims

Specialist claims for qualifying development work.

Group and international

Transfer pricing, group relief and cross-border considerations.

Who we work with

Logos are shown for identification. We are not affiliated with every provider listed and do not cover the whole market.

Crunch logoCrunch
Mazuma logoMazuma
TaxAssist logoTaxAssist
The Accountancy Partnership logoThe Accountancy Partnership
1st Formations logo1st Formations
Osome logoOsome
Sage logoSage
Xero logoXero
Contact us about business tax

Comparing with us is a no-brainer

A pre-year-end review moved us out of the marginal band and saved five figures.

Marcus, engineering firm, Sheffield

business tax services guides

Accountant working through digital tax records
Guide

Making Tax Digital: what UK businesses must do

Who is in scope, which software qualifies and the deadlines HMRC expects you to hit.

Read guide
Invoices and a calculator on a desk
Guide

Cutting the cost of your accounting stack

Where subscription tiers, per-user fees and add-on modules quietly inflate your bill.

Read guide
Team meeting about business finances
Guide

In-house vs outsourced finance

When a bookkeeper, an accountant or a fractional finance director makes more sense.

Read guide

business tax services FAQs

When is corporation tax due?

Nine months and one day after the end of your accounting period, with the return due twelve months after.

What is marginal relief?

It smooths the jump between the 19% and 25% rates, producing an effective 26.5% rate on profits between £50,000 and £250,000.

Can I claim R&D relief?

Only for work that seeks an advance in science or technology and resolves genuine technical uncertainty. Evidence is essential.

Written by the Grow Your Business editorial team · Updated 26 July 2026