AAT-Qualified Bookkeeping You Can Rely On
TIA Bookkeeping is the dedicated bookkeeping division of The Invisible Assistant, established in 2009. With over 50 years of combined experience across our team, we deliver accurate, reliable bookkeeping to businesses of all sizes across the UK.
Every client gets a dedicated, AAT-qualified bookkeeper who understands their industry. We're certified advisors for Xero, QuickBooks, and Sage — so your books are always in expert hands.
What We Stand For
Our values shape every aspect of how we work with clients — from the first call to every monthly report.
Accuracy First
Every transaction reconciled, every return double-checked. We maintain a 99.9% accuracy rate because your finances deserve nothing less.
Personal Service
You'll have a dedicated, named bookkeeper who knows your business inside out — not a faceless call centre.
Qualified Expertise
Our team holds AAT qualifications and certified advisor status with Xero, QuickBooks, and Sage.
Transparent Pricing
Fixed monthly fees with no hidden charges. You'll always know exactly what you're paying before we start.
Our Journey
From a small Southampton office to serving businesses across the UK.
The Invisible Assistant founded in Southampton
Moved into our new office at Southampton Science Park
Xero Silver Partner status awarded
Hit 100 five-star reviews across Google, Trustpilot, Bark & more
Winner of CorporateLiveWire — Virtual Business Support Partner Of The Year
Test Valley Business Award in Innovation & Technology — Finalist
What We Deliver
We handle the full spectrum of bookkeeping so your accountant receives clean, accurate records every time.
- Bank reconciliations & transaction recording
- VAT returns (Standard, Flat Rate, Cash Accounting & margin schemes)
- Management accounts & financial reporting
- Year-end accounts preparation
- Xero, QuickBooks & Sage setup, migration & training
- Debt collection & credit control
- GDPR-compliant, fully insured operations
Part of a Bigger Team
TIA Bookkeeping is part of The Invisible Assistant, a business support group that also includes TIA Payroll. This means our clients benefit from seamless integration between bookkeeping and payroll — fewer handoffs, fewer errors, and one team that understands your entire financial picture.
Talk to Our TeamReady to Work With Us?
Join hundreds of UK businesses who trust TIA Bookkeeping for accurate, reliable bookkeeping. Get a free, no-obligation quote today.
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Contact Information
100% Confidential - Your information is secure and will never be shared with third parties. We're GDPR compliant and fully insured.