Tax Outsourcing That Understands Both Sides Of The Atlantic.
For over 22+ years Integra has supported accounting firms through the busiest periods of the tax calendar with dedicated specialist teams for US tax and UK tax respectively. Two teams, built for two distinct tax systems, so your firm never has to turn away a client or miss a deadline.

22+ Years
Serving accounting firms
4 Countries
USA, UK, Canada & Australia
ISO 27001
Certified information security
GDPR Compliant
Your clients' data protected
US Tax. UK Tax. One Specialist Partner.
Whether you're a US firm drowning in tax season or a UK practice overwhelmed by self-assessment our dedicated specialist teams step in exactly when you need them, and scale back when you don't.
USA Tax Services
Specialist US tax team built for tax season
- Individual tax returns (1040)
- Corporate tax returns (1120, 1120S)
- Partnership returns (1065)
- State and local tax returns
- Tax extensions filing
- Estimated tax payments
- Tax planning and advisory support
UK Tax Services
Specialist US tax team built for tax season
- Self-assessment tax returns
- Corporation tax returns (CT600)
- Partnership tax returns
- Capital gains tax reporting
- PAYE and payroll tax
- VAT returns
- HMRC correspondence
Do your clients sell into the EU? Our sister company Cross Border VAT handles IOSS registration, OSS filing and ongoing EU VAT compliance so your firm can serve eCommerce clients with confidence.
The Four Tax Challenges Every Accounting Firm Faces.
If any of these sound familiar you're in the right place.
Tax season hits and your entire firm goes into panic mode
Every year the same story January to April in the USA, January in the UK and suddenly there's more work than your team can handle. Clients wait, deadlines loom, and your best people are buried.
Hiring seasonal staff costs more than the season itself
Recruiting, onboarding and training tax staff for a four-month peak only to let them go afterwards is expensive, disruptive and inefficient. There has to be a better way.
One missed deadline can damage a client relationship you've spent years building
Tax deadlines aren't flexible. A late filing means penalties for your client and a serious question mark over your firm's reliability.
Your clients' tax needs are getting more complex and your team can't keep up
Cross-border transactions, eCommerce VAT, multiple jurisdictions the complexity of client tax work is growing faster than most firms can staff for.
Why Accounting Firms Trust Integra With Their Accounting Work.
Most outsourcing providers win on price and lose on delivery. We win on expertise, while staying highly competitive on price and that's a very different conversation.
Dedicated US and UK tax teams
Not a shared pool of generalists. Dedicated specialist teams one for US tax, one for UK tax who work exclusively in their market and know every deadline, every form and every regulation.
Scales up for peak season, scales back when it's over
Our model was built around the tax calendar. When January hits, your capacity expands instantly. When the rush ends, you're not carrying costs you don't need.
Up to date on every regulatory change
Working across hundreds of accounting firms simultaneously means we track every regulatory update in both markets before it affects your clients.
Specialist expertise your firm can offer without hiring for it
EU eCommerce VAT, cross-border transactions, complex returns bring us the difficult cases. We either have the expertise in house or we find it through our network.
Tax Sorted. Now Let's Handle The Rest Of Your Workload.
Firms that outsource tax with us rarely stop there. Bookkeeping, accounting, payroll and iXBRL the same Integra team handles it all, to the same standard your clients expect.
Trusted By Accounting Firms Across The USA, UK & Beyond.
Ready To Stop Dreading Tax Season?
Book a 20 minute discovery call and find out how quickly our dedicated tax teams can take the pressure off so your firm delivers for every client, every deadline, every year.