★★★★★
We’re in the process of starting a business. SBX have been so proactive and easy to contact. Their business model is set perfectly for modern day busy life.
HT
Hannah Tyrrell
Starting a business · Google review
Startup accountants for new and growing businesses
Startup accountants for new businesses across London and the UK, from company formation to your first hire. The right structure, clean startup bookkeeping and no compliance surprises while you build, from £60 a month.
Google Reviews5.0 ★★★★★
Trustpilot4.7
The decisions every startup faces.
Starting a business means a hundred decisions at once, and the financial ones feel the most permanent. These are the questions founders and entrepreneurs bring to us most in the first year of a new business.
Sole trader or limited company at company formation?
Everyone has an opinion, and the wrong choice costs real money at company formation. Our sole trader vs limited company guide covers the trade-offs, and we will look at your actual numbers and plans, then tell you plainly.
When to register for VAT
The £90,000 threshold sneaks up on a growing small business, and registering too early or too late both hurt. You need someone watching your rolling 12-month turnover for you.
Your first hire
Payroll, workplace pensions, PAYE registration and payslips. Hiring your first employee should feel like a milestone, not a compliance problem to solve at the weekend.
Runway you can see without a spreadsheet
A bank balance is not a forecast. Startup bookkeeping should tell you how many months you have, what is owed and what is coming in, without you building spreadsheets at midnight.
If that list reads like your week, we should talk. We set up startups and new businesses properly, keep the books clean from the first sale and flag every threshold before it matters. Founders and entrepreneurs get startup tax advice as part of the monthly fee, not as an extra. We reply within one working day.
What we handle for startups and new businesses.
Company formation done once and properly, then a startup accountant every month after, from £60. No hidden fees.
Business Set-Up
Structure, HMRC registrations and software for a new business, set up correctly from day one.
ExploreIncorporation
Company formation done quickly and correctly, with every filing in place.
ExploreBookkeeping
Startup bookkeeping from your first sale, so you always know your runway.
ExplorePayroll & CIS
Your first hire paid properly, with PAYE registration, workplace pensions and payslips handled.
ExploreBuilt to grow with you
Start from £60 a month and add payroll, VAT or management reporting only when you actually need them. Your quote arrives by email after a quick call, and it never changes without a conversation first. No hidden fees.
Already trading with an accountant for your small business who has gone quiet? Switching takes one email. We do the rest.
See what your startup expenses could save.
Most new business owners under-claim. Add up your likely costs and see what they take off your tax bill.
Business expense tax savings
Estimate the tax you could save by claiming allowable business expenses.
Business type
Your tax band
Estimated tax saving£0/year
Total allowable expenses£0
Saving per month£0
Mileage at 55p then 25p (2026/27) · Income Tax saving only
Asked before the first invoice goes out.
Get in touchIt depends on your expected profit, your appetite for admin and whether you need to protect personal assets. Below roughly £40,000 to £50,000 of profit, sole trader is often simpler; above it, a limited company usually saves tax. We look at your actual plans and give you a straight recommendation on a free call.
When your taxable turnover passes £90,000 in any rolling 12 months, not just in a tax year. Some new businesses benefit from registering voluntarily before that, particularly if your customers are VAT-registered and you have input VAT to reclaim. We monitor the threshold for you and handle the registration when the time comes.
The most expensive mistakes happen in the first year: wrong structure, missed registrations, messy records. Getting set up properly costs far less than unpicking it later, and our startup accountant fees start at £60 a month, built for early-stage budgets. No hidden fees.
We register you as an employer with HMRC, set up payroll and the workplace pension, and run payslips every month. You tell us who to pay and how much; we handle the rest, including every RTI filing.
Sole traders and new businesses start from £60 per month, and limited companies from £135 per month, fixed and agreed up front. Start small and add services only when you need them. Use our instant estimate tool for a ballpark in under a minute. No hidden fees.
More than most founders expect. Equipment, software, travel and a share of home-working costs all count, and costs from before you started trading are usually claimable too. Our guide to allowable startup expenses covers the rules, and we check every claim properly.
150+ businesses trust SBX, rated 5.0 on Google and 4.7 on Trustpilot.
Talk to chartered accountants in London & Slough.
SBX helps you stay compliant & keep more of what you earn with expert tax, accounts, and bookkeeping services.
★★★★★ 5.0 on Google, 4.7 on Trustpilot · ICAEW Chartered