Visa-sponsoring startups in London: how it works

Most people who move to London for a startup job do it on a Skilled Worker visa. It is a well-trodden route, but it has rules that a small company has to set up in advance — so it pays to know what to look for before you spend weeks interviewing.

This guide explains how the system works in general terms. Immigration rules, salary thresholds and fees change regularly. Always check the current rules on GOV.UK, and speak to an immigration adviser for your own situation.

The short version

• A UK employer can only sponsor you if it holds a sponsor licence from the Home Office.
• Once you have an offer, the employer assigns you a Certificate of Sponsorship (CoS) — a reference number you use in your visa application.
• The role has to meet the rules for the route, including an eligible occupation and a minimum salary. The thresholds are set by the Home Office and are updated from time to time.
• You then apply for the visa yourself, pay the application fee and the Immigration Health Surcharge (unless your employer offers to cover them), and wait for a decision.

Step 1: check the sponsor licence

The Home Office publishes a register of licensed sponsors on GOV.UK. It is a public list of every organisation that can currently sponsor workers, updated regularly. Search it by the company's legal name, which is often different from the brand name you see on the website — the legal name is usually in the footer of their site or on Companies House.

If a startup isn't on the register, that doesn't make sponsorship impossible — it means they would need to apply for a licence first. That takes time, costs money and adds admin, so early-stage teams sometimes say no simply because they haven't done it before. It is worth asking, but go in knowing it is a bigger ask.

Step 2: read the role, not just the badge

On Ascent, every role can carry its own visa flag, separate from the company's general policy. That matters: a company that has sponsored engineers before may not sponsor every role, and a company that has never sponsored anyone may make an exception for a hard-to-fill position.

When a role says visa sponsorship available, it means the company told us (or its job board says) it will sponsor for that role. When it says nothing, it means we don't know — not that the answer is no.

Step 3: ask early and ask plainly

Raise sponsorship in your first conversation, not after the final round. Good questions:

1. 01Do you currently hold a sponsor licence, and have you sponsored someone in this kind of role before?
2. 02Who handles the process — an in-house person or an immigration firm?
3. 03Will you cover the visa fees and the Immigration Health Surcharge, or any part of them?
4. 04Is there a repayment clause if I leave within a certain time? (Some employers recover costs; the rules limit what they can claw back.)
5. 05What start date is realistic once the offer is signed?

A clear, specific answer is a good sign. "We'll figure it out" from a team that has never done it is worth probing gently.

What it costs, and who pays

There are two main costs on the employer side — the sponsor licence itself (if they don't have one) and the fee to assign a Certificate of Sponsorship, plus the Immigration Skills Charge for most roles. On your side, there is the visa application fee and the Immigration Health Surcharge, which is paid up front for the length of the visa.

Practice varies. Some startups cover everything, some cover their own costs only, some offer a relocation budget instead. All of these are normal; what matters is that it's written into your offer.

Other routes worth knowing

• Global Talent visa — for people endorsed as leaders or emerging leaders in fields including digital technology. It doesn't need an employer sponsor, which makes switching jobs easier.
• High Potential Individual visa — for recent graduates of eligible universities outside the UK, for a fixed period, without a job offer.
• Graduate visa — if you studied in the UK, you may be able to work for a period after your degree without sponsorship.
• Scale-up visa — for roles at companies that meet the Home Office's growth criteria; the employer sponsors you initially, then you can move freely.

Each has its own eligibility rules. GOV.UK has the current details.

How to use Ascent for this

• Turn on the Visa sponsorship filter on the jobs page or map to see only roles flagged as sponsoring.
• Open a startup's profile to see whether it lists sponsorship as a benefit, alongside its offices and every open role.
• Save the search and switch on alerts — new sponsoring roles in London land in your inbox the day we find them.