We handle your bookkeeping, year-end accounts, tax and payroll, from £60/m*. Fixed fees, no surprises.
One monthly fee that covers your accounts, tax and filings. No hourly billing and no surprise invoices at year end.
Support for SEIS and EIS advance assurance and R&D tax credits, the reliefs that matter most before and after you raise.
SleekBooks keeps invoices, bank feeds, documents and accountant collaboration in one place, with AI-assisted admin and human accountant review.
Clean management accounts and a tidy cap table picture, so due diligence does not stall your next round.
Switch to Sleek and save 20% on annual accounting, with reliable support and full compliance.
We take over filings with Companies House and HMRC. Not incorporated yet? We’ll handle that for you.
If you plan to raise, we set up SEIS/EIS and reporting early so investor due diligence is painless.
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Our startup accounting does more than file your year-end accounts. Sleek runs your bookkeeping, Corporation Tax, VAT, & Payroll on SleekBooks, our in-house connected accounting software; supports your SEIS/EIS and R&D claims, and gives you a dedicated accountant, all on a fixed monthly fee, from £60/m.
Prefer Xero? Try our Pro Plan, or as an optional add-on to Basic.
A startup accounting plan covers bookkeeping, year-end accounts, your Corporation Tax (CT600) return and confirmation statement filing, with VAT and payroll added on the Pro plan. Sleek runs the Basic plan on SleekBooks, our connected accounting software, and the Pro plan on Xero, with a dedicated accountant either way. The small profits Corporation Tax rate is 19% on profits up to £50,000, which most early-stage companies fall under.
Sleek’s accounting starts from £60 a month on the Basic plan, billed annually, with the Pro plan at £100 a month for funded startups that need VAT, payroll and investor reporting. There are no setup fees and book migration is free. Pricing is fixed, so unlike hourly high-street firms you know your full-year cost before you sign.
Yes. We support SEIS and EIS advance assurance and the compliance filings that follow your raise, plus R&D tax relief claims under the merged scheme that began on 1 April 2024. Loss-making R&D-intensive startups can claim up to 27% under the ERIS rate, and SEIS gives your investors 50% income tax relief on up to £200,000 a year, which makes your round easier to fill.
It depends on your stage. The Basic plan runs on SleekBooks, which brings invoices, bank feeds, documents and accountant collaboration into one connected place with AI-assisted admin and human accountant review, a good fit for new startups that are not yet VAT-registered. The Pro plan runs on Xero, and Basic users can add Xero as an option if they prefer it. Either way your dedicated accountant migrates your books for free.
The best time is before your first raise or your first hire, not after the deadlines start landing. Getting your books, SEIS/EIS position and Corporation Tax registration set up early means you avoid the penalties and rushed cleanups that scare off investors. Many founders sign up at incorporation so the foundations are right from day one.
Yes. You work with a named UK accountant rather than a call-centre queue, so the person who knows your numbers is the person you speak to. They track every Companies House and HMRC deadline for you and flag issues before they become penalties, using live bank feeds rather than waiting for year end.
Yes. Many of our startup clients sign up before their first invoice, because getting SEIS/EIS and clean books in place early makes fundraising far smoother. The Basic plan on SleekBooks is designed for exactly this stage, and you can move to Pro once you take on VAT obligations or employees. If you are not incorporated yet, we can handle incorporation first.
We take the protection of your personal and financial data seriously.
Sleek maintains several recognised security certifications and compliance frameworks. Our organisation is certified for ISO 27001:2022, PCI DSS, and SOC 2, and our systems and processes are designed to comply with GDPR requirements.
These certifications reflect our commitment to maintaining strong information security controls, protecting sensitive data, and adhering to internationally recognised privacy and security standards.
