Business Set Up
Put the buy-in terms for a new shareholder into clear legal wording
Draft or review a UK share buy-in agreement for a new shareholder joining your company, covering payment, share issue and key protections.
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What's included
What this share buy-in agreement service covers
A fixed fee service for drafting or reviewing the main agreement used when a new shareholder buys into your company.
- Consultation with a UK-qualified lawyer
- Drafting or review of a share buy-in agreement
- Legal input on share classes, investor rights and transaction terms
- Advice on key clauses such as payment, conditions and transfer mechanics
- One round of amendments
Project
Share Buy In Agreement
Status
CompletePrepared by
Alex Solo
Senior Lawyer

FAQs
Frequently asked questions
Unsure about how we work? We have gathered the most common questions for your convenience.
An informal buy-in can leave major points unclear, even where everyone thinks the commercial deal is settled. Common trouble spots include exactly how many shares are being acquired, whether any conditions must be met before completion, what rights attach to the shares, and what happens if payment is delayed or the deal changes. If the company already has articles, a shareholders agreement or earlier investor documents, the new arrangement also needs to sit properly with those. A written agreement helps turn the deal into something precise enough to sign and act on.
It will usually identify the parties, the shares being bought, the price or investment amount, when payment is due, and any conditions that need to be satisfied before the transaction completes. Depending on the deal, it may also cover warranties, confidentiality, restrictions on what happens before completion, and practical completion steps. Some matters also need the agreement to line up with existing constitutional documents or shareholder arrangements. We look at the legal wording of the buy-in document itself rather than treating the transaction as a broad advisory project.
We usually need the names of the parties, the company details, the number and class of shares involved, the agreed price or contribution, and any special commercial points already discussed. It also helps to have your current articles, any shareholders agreement, and any heads of terms or email summary of the deal. If there are conditions, staged payments, founder approvals or investor-specific rights being discussed, those should be flagged early. The more settled the commercial position is, the more efficiently the drafting can move.
A template may be a rough starting point for a very simple deal, but it often misses the points that matter in a live transaction. For example, it may not reflect your share structure, any existing shareholder arrangements, or the exact conditions attached to the incoming investor's buy-in. It can also leave gaps around payment timing, completion mechanics or what happens if the deal does not proceed as expected. Where ownership is changing, small wording issues can have outsized consequences, so bespoke legal drafting is often the safer route.
No. This service covers the agreement and advice connected to that document. If the transaction also requires board minutes, shareholder resolutions, updates to registers, filings or other implementation steps, those would need to be considered separately. That distinction matters because the agreement records the legal deal, while completion and post-completion actions can involve additional documents and process work. Tax advice is also outside this service. If you need help beyond the agreement itself, we can let you know what extra support may be appropriate.
Working with us is simple. Start by submitting an enquiry through our website using the form at the top of this page or on our Get Started page. A legal project manager will review your enquiry within 1 business day and reach out to understand your needs.
They'll send you a fixed fee quote outlining costs, scope, and timing. If you're happy, you can accept and sign our engagement letter online. Once that's done, we'll connect you with an expert lawyer who will complete your project via email, phone, or video chat, with the timing confirmed in your quote.
If you're not looking for help with a specific matter, explore our platform, which offers free templates, tools to get your business set up, and even a free tier to get started. Whether you need legal support or just want to browse resources, we've got you covered.
At Sprintlaw, our pricing is transparent and designed for startups and small businesses. Many one-off legal services, including document drafting and reviews, are provided for a fixed fee with an upfront quote before you proceed.
Prices typically range from £100 to £1,500 depending on the complexity and scope of the work. For ongoing support, Sprintlaw Memberships include options such as legal templates, consultations, a legal helpline and credits for services.
If your project is larger or more complex, we will provide a tailored quote after understanding what you need.
Sprintlaw UK operates fully virtually, with the team working online across the UK to provide support to startups and small businesses nationwide. Many of our team are based in London and often meet at co-working offices, but our operations remain fully digital, ensuring flexibility and efficiency for both our clients and team.
From quote to delivery in three simple steps
Getting quality legal help for your business has never been easier or more affordable.
Get a free quote
Our legally trained consultants will prepare a fixed-fee quote for you.
Accept online
Accept your fixed-fee quote and e-sign our engagement letter.
Speak with a lawyer
Our expert lawyers will talk you through your project via phone, video call or whatever suits.
Get a free quote
Our legally trained consultants will prepare a fixed-fee quote for you.
Accept online
Accept your fixed-fee quote and e-sign our engagement letter.
Speak with a lawyer
Our expert lawyers will talk you through your project via phone, video call or whatever suits.
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