For UK founders raising under SEIS and EIS
Start up, get investment ready, raise investment, grow.
One journey, with Seisly alongside doing the work that gets in the way of the work you started the company to do.
Free. No account. Two minutes. Or start your application straight away.
The journey
Start up
How to incorporate with a share structure that does not break relief later.
Free advice, liveGet investment ready
Nine-category eligibility diagnostic, then advance assurance drafted and filed.
Live nowRaise investment
Matched investors, drafts in your voice, you authorise every send.
Early accessGrow
Cap table, option schemes, certificates, ongoing compliance.
In buildThe workspace
Your raise has one home, not eleven tabs.
Everything about your company lives in one raise profile. Answer something once and it flows into every application, document and introduction that needs it. Cecily is there throughout. See the whole workspace.
Raise profile
One source of truth for your company.
FreeApplications
SEIS and EIS, drafted and tracked.
WorkspaceInvestor directory
Browse who backs companies like yours. Contact details with the workspace.
FreeFractional directory
Part-time CFOs, CMOs and CTOs.
FreeCompliance
SEIS1 and SEIS3, on time.
WorkspaceInvestor outreach
Drafted for you, sent by you.
Workspace, soonCap table
Share issues that reconcile.
Workspace, soonDocuments
Round papers and your data room.
Workspace, soonWho built it
Not a platform that hired an expert. An expert who built a platform.
Corporate financier
Structuring deals for the people writing the cheques.
Venture fund manager
Set up the UK's first SEIS fund, the day the scheme opened in 2012.
Founder and operator
Has raised, hired and shipped, not only advised.
Chartered adviser
Fellow of the Institute of Chartered Accountants in England and Wales, and Chartered Tax Adviser.
Sanjay Wadhwani, founder of Seisly
We have been in this world since 2012. We know what HMRC looks for, what trips founders up, and why most straightforward advance assurance cases do not need a full advisory engagement.
What is included
Everything you need.
Nothing you don't.
Advance assurance is HMRC's written view, before you raise, that your company and your share terms qualify for SEIS or EIS. It is the first thing most investors ask for. Seisly prepares the whole application, checks it against every qualifying condition, and can take it all the way to HMRC.
Instant eligibility check
Know in 5 minutes whether you qualify, before you spend a penny.
Full application preparation
We prepare your complete SEIS or EIS advance assurance application and draft the covering letter for you to review and approve, in the format HMRC expects.
AI document review
We review your uploaded documents for completeness and consistency before submission. You see exactly what HMRC will see, with suggestions to strengthen your application.
Submission to HMRC
Add Submission and we file your application as your appointed agent, manage HMRC's response, and handle one round of queries. Where a review is not clear we do not file it; we connect you with a specialist adviser instead, so your application goes from a recognised firm, which HMRC and investors both view favourably.
HMRC response tracking
If you add Submission, we track your application status and notify you the moment HMRC responds. Average HMRC turnaround is 4 to 8 weeks.
Query support
If you add Submission and HMRC comes back with questions, we help you respond. One round of HMRC queries included.
How it works
Your part takes under 30 minutes.
We handle the rest.
We handle the complexity. You focus on building.
Check your eligibility
Answer a few questions about your company and we check you against all HMRC qualifying conditions for SEIS and EIS. Free, instant, and no account needed.
Takes 5 minutesTell us about your raise
How much are you raising, from how many investors, and on what terms. We use this to complete your application correctly first time.
No jargon, plain English throughoutWe draft your application
Our AI drafts your full advance assurance submission and the covering letter HMRC reads first, for you to review and approve, built from over a decade of real applications.
AI-powered, expert-trainedReview, approve, submit
Read through your application, make any tweaks, and it goes to HMRC's SEIS and EIS team: you file it yourself, or add Submission and we file it as your appointed agent.
HMRC turnaround: 4 to 8 weeksHMRC responds
HMRC issues their decision, usually in 4 to 8 weeks. If we submitted for you, we track it and tell you the moment it lands; if you filed yourself, HMRC contacts you directly. Once approved, you are ready to raise.
Approved: ready to raiseThe honest comparison
Seisly vs everyone else
| Full advisory engagement | Online legal platforms | Seisly ✦ | |
|---|---|---|---|
| SEIS advance assurance | ~£2,000 + VAT | ~£500 + VAT + subscription | £99 + VAT |
| EIS advance assurance | ~£2,500 + VAT | ~£500 + VAT + subscription | £99 + VAT |
| SEIS and EIS together | ~£3,000 + VAT | ~£800 + VAT + subscription | £99 + VAT |
| Fully done for you: prep, expert review and submission | part of the engagement | plan + add-on | £399 + VAT |
| Advance assurance without a subscription | ✓ | ✗ | ✓ |
| Instant eligibility check | ✗ | ✓ | ✓ |
| Complex cases handled | ✓ | ✗ | ✓ (referred to specialist advisers) |
| HMRC query support included | ✗ billed extra | ✗ | ✓ with Submission |
| Built by SEIS fund founders | ✗ | ✗ | ✓ |
Scroll across to compare all three options →
How Seisly prices it: £99 + VAT for Seisly to help you prepare your application, with our AI reviewing it and reporting back to you, £199 + VAT to add an expert human review by a Chartered Tax Adviser, £199 + VAT for us to submit to HMRC as your appointed agent, or £399 + VAT for the all-in package with all three. No subscription needed to buy advance assurance.
Full advisory engagements make sense when your situation is complex, you need ongoing tax or corporate advice, or you want someone in your corner for the whole raise. For those cases we refer founders to specialist advisers in our network.
Pricing
Two ways in.
Advance assurance on its own, or the workspace subscription with it included. The eligibility check is free either way.
The one thing you need before an investor writes a cheque. No commitment.
- ✓Nine-category eligibility diagnostic
- ✓Application drafted for you
- ✓Reviewed by a Chartered Tax Adviser
- ✓Filed with HMRC on your behalf
Your advance assurance, and every stage of the raise around it.
- ✓Your advance assurance application, drafted for you – £99 on its own
- ✓Everything about your company in one raise profile
- ✓The investor and fractional directories, in full
- ✓Expert review and submission when you want it
+Investor outreach, cap table and documents as they land, at no extra cost
Not sure your company qualifies for SEIS or EIS? Check first, free. Subscribing does not make a company eligible.
Cancel any time.
Non-UK companies: add £100 to the application fee.
Seisly prepares advance assurance applications for UK founders. We do not guarantee that any application will be approved by HMRC. Advance assurance is discretionary and HMRC's decision is final. See our Terms of use for full details.
FAQ