Expert Accounting & Tax Services for UK Businesses
Online chartered accountants for sole traders, limited companies, landlords and SMEs. Helping UK businesses with tax returns, bookkeeping, payroll, VAT, and Making Tax Digital.
- ACCA Qualified Chartered Accountants
- Fixed-fee monthly packages — no surprises
- Xero, QuickBooks & FreeAgent Partners
Comprehensive Accounting & Tax Services
From sole traders to limited companies, we provide affordable, fixed-fee accounting services trusted by 5,000+ UK businesses.
Accounting & Bookkeeping
Accounting Services
Full management accounts, statutory filings and financial reporting.
Bookkeeping Services
Real-time cloud bookkeeping using Xero, QuickBooks or FreeAgent.
Payroll Services
Full-service RTI payroll, PAYE, and workplace pension processing.
Property Accountants
Specialist advice for landlords on rental income, CGT, and portfolios.
ACCA-Qualified Chartered Certified Accountants with 20+ Years of Experience
Blue Mountain Accountants is an award-winning, ACCA-qualified firm serving sole traders, limited companies, landlords and SMEs across Milton Keynes, Northamptonshire, Bedfordshire, Hertfordshire and the whole of the UK online.
- Specialists in Making Tax Digital (MTD) compliance
- Authorised Xero, QuickBooks & FreeAgent partners
- Transparent fixed-fee pricing — no hidden charges
- Dedicated accountant assigned to every client
Proactive Tax Planning That Saves You Money Year After Year
We don't just file your accounts — we look ahead. Our proactive approach to tax planning ensures you claim every allowance available, from capital allowances and R&D tax credits to pension contributions and directors' remuneration strategies.
- Corporation Tax & Self Assessment specialists
- Buy-to-let & property portfolio accountants
- IR35 & contractor compliance experts
- International accounting & cross-border tax
Trusted by Thousands of UK Businesses
Our numbers speak for themselves — two decades of outstanding client service.
Sector-Specific Accounting Expertise
We understand your industry's unique tax laws, HMRC rules and financial challenges — so you don't have to.
Construction & CIS
CIS contractors & subcontractors
Property & Buy-to-Let
Landlords & property investors
IT Contractors
IR35 & off-payroll working
Healthcare
GPs, dentists & locums
Retail & E-Commerce
Amazon, Etsy & online sellers
Restaurants & Hospitality
Restaurants, cafés & hotels
Professional Services
Solicitors, consultants & agencies
Technology & SaaS
Startups & tech companies
Real Estate Agents
Estate agents & lettings
Sole Traders & Freelancers
Self-employed individuals
Limited Companies
Directors & shareholders
SMEs & Startups
Growth-stage businesses
Simple, Transparent Fixed-Fee Pricing
No hourly rates. No surprise bills. Pick the package that fits your business and switch anytime.
Ltd Company Starter
Perfect for Sole Traders
- Self Assessment Tax Return
- Bookkeeping (up to 50 transactions)
- Quarterly VAT Returns
- HMRC Registration Support
- Payroll (up to 1 employee)
- Limited Company Accounts
- Corporation Tax Return
- Dedicated Accountant
Ltd Company Growth
Best for Limited Companies
- Annual Statutory Accounts
- Corporation Tax Return (CT600)
- Director's Self Assessment
- Payroll (up to 5 employees)
- VAT Returns (MTD compliant)
- Cloud Accounting (Xero/QBO)
- Dedicated Accountant
- Quarterly Tax Planning Review
Premium
For Growing Businesses
- Everything in Growth
- Quarterly Tax Planning Review
- R&D Tax Credits Advice
- Payroll (unlimited employees)
- Company Secretarial Services
- Personal Tax Planning
- Fee Protection Insurance
- Virtual CFO Consultations
All prices exclude VAT. Bespoke packages available for larger businesses — contact us for a tailored quote.
Switching to Blue Mountain is Simple
Join thousands of UK businesses who switched accountant and never looked back.
Book a Free Consultation
Speak with a qualified accountant who understands your business. No obligation — just expert advice tailored to your situation.
We Review Your Financials
We assess your current tax position, compliance status, and identify immediate opportunities to reduce your liabilities.
Custom Fixed-Fee Proposal
You receive a clear, jargon-free proposal with a fixed monthly fee — no surprises, no hourly billing.
Onboarding & Cloud Setup
We set you up on Xero, QuickBooks or FreeAgent and migrate your records. You're live and compliant from day one.
Ongoing Support & Tax Planning
Your dedicated accountant handles filings, deadlines and proactive planning year-round. We grow as your business grows.
What Our Clients Say
Rated 4.9★ on Google — see why 5,000+ UK businesses trust Blue Mountain Accountants.
“Switched to Blue Mountain two years ago and have not looked back. They handle our CIS, payroll and VAT returns seamlessly. Their proactive tax planning saved us over £8,000 last year alone.”
“As an IT contractor navigating IR35, I needed an accountant who really understood the legislation. Blue Mountain gave me clear, confident advice and sorted my Self Assessment quickly.”
“They restructured my property portfolio, advised me on Section 24, and helped me set up a limited company for future purchases. Brilliant service — well worth every penny.”
“From company formation to R&D tax credits — Blue Mountain handled everything as we scaled. They feel less like accountants and more like business partners who genuinely care.”
Latest Tax News & Guides
MTD ITSA 2026: A Practical Checklist for Sole Traders and Landlords Over £50,000
From April 2026 Making Tax Digital for Income Tax Self Assessment becomes mandatory for self-employed and landlords with income over £50k. Here's what you must do now.
When Should a Sole Trader Convert to a Limited Company? Key Financial Thresholds for 2026-27
HMRC Payrolling Benefits in Kind: Mandatory Changes from April 2026 Explained
How to Avoid Capital Gains Tax on Buy-to-Let Property in the UK
Ready to Stop Overpaying Tax?
Book your free 30-minute consultation with a qualified UK accountant. We'll review your situation and show you exactly how much you could save — with zero obligation.
- ✓No obligation — completely free
- ✓Speak directly with a qualified accountant
- ✓Available in-person (MK) or online UK-wide