How to fund a UK startup and what each route costs

Every way of funding a startup has a cost, whether in interest, a share of the company or the time an application takes. This guide sets out the UK options and what each one costs.
By Buzz Accounting · Updated 13 July 2026

Decide what the money is for

Before you apply for anything, be clear what the money is for and how it will be repaid or earn a return. A lender or investor needs a specific answer, such as “£40,000 of stock that sells through every 60 days at a 45% margin”. Applications go better when the use of the money is specific and your numbers show where repayments will come from.

Then match the type of funding to what the money is for:

  • Buying things that earn money, such as stock or equipment, suits a loan or asset finance. A loan is usually the cheapest money, and you keep all your shares.
  • Covering gaps in cashflow suits a working capital loan, invoice finance or a revolving credit facility, which is a credit limit you can draw on and repay as you need.
  • Building something unproven, such as a new product, research and development or a move into a new market, suits grants first and then equity. A loan for unproven work often needs a personal guarantee, which leaves you owing the money yourself if the work fails.

What this guide covers

  • Start Up Loans, grants, other lending, revenue-based finance and equity compared
  • What each route costs, including personal guarantees and time
  • What lenders and investors check
  • Where to go for loans, grants and investors

The main funding routes

1. Start Up Loans (government-backed)

A Start Up Loan is £500 to £25,000 per founder, up to £100,000 for one business where each applicant owns shares and helps control it. The interest rate is fixed at 7.5%, the loan is repaid over 1 to 5 years, there is no application fee or early repayment fee, and you get up to 12 months of free mentoring. It is a personal loan to the founder for business use, so the business does not need a trading history, and it is the usual first borrowing for businesses that are pre-revenue or have just started trading. On 6 April 2026 the rate rose from 6% to 7.5%, and the scheme opened to businesses that have been trading for up to 60 months, up from 36.

2. Grants

Grants are awarded competitively. A grant does not have to be repaid, and you give up no shares for it. Innovate UK funds innovation projects, and there are regional growth funds and schemes for particular sectors, such as green technology, the creative industries and food production. An application takes days of work and success rates are low. Grants open and close through the year, so check what is open now. Your local growth hub, the government's business finance support finder and Swoop's funding platform are the places to start.

3. Bank and alternative debt

This covers term loans, overdrafts and revolving credit facilities. Banks usually want to see a trading history and often ask for a personal guarantee. Lenders other than banks usually decide faster and charge more. Compare offers on the total cost of credit, which is everything you repay on top of the amount you borrow.

AD Solicitors, a separate SRA-regulated law firm, has a guide to personal guarantees for directors.

4. Asset and invoice finance

Asset finance spreads the cost of equipment over time and is secured on the equipment itself, which makes it easier to get than an unsecured loan. Invoice finance advances a large share of the value of your unpaid invoices straight away. It helps a startup that sells to other businesses on 60-day payment terms, and it becomes expensive if you rely on it permanently.

5. Revenue-based finance

Revenue-based finance is for businesses with recurring revenue, such as subscriptions. You receive an advance and repay it as a percentage of each month's income, so repayments fall when revenue falls, and you give up no shares. The total you repay is capped at a multiple of the advance. A cap of 1.4 times the advance, repaid within 14 months, makes it an expensive way to borrow.

6. Equity

Equity means selling shares in the company, usually first to angel investors, who invest their own money, and later to venture capital funds. Over time it is the most expensive money you can take, because a 15% stake sold at seed stage in a company that succeeds can be worth millions later. It suits unproven work with a large potential upside. UK angels rely heavily on two tax reliefs, the Seed Enterprise Investment Scheme (SEIS) and the Enterprise Investment Scheme (EIS). Under SEIS a company can raise up to £250,000 and investors get 50% income tax relief. Under EIS a company can raise up to £24m over its life and investors get 30% relief. Most angels expect you to have advance assurance, HMRC's view that the company is likely to qualify, before you pitch. Our SEIS and EIS page explains how we prepare the application.

Three ways to fund £40,000

The figures below are illustrative, for a company that needs £40,000 to buy stock and hire one person.

  • Start Up Loans. Two founders take £20,000 each at a fixed 7.5% over five years. Repayments are £801.52 a month between them, total repaid £48,091.08, so the money costs £8,091.08. The founders keep all their shares and owe the loans personally.
  • Revenue-based finance. £40,000 advanced with a repayment cap of 1.4 times, repaid from monthly revenue over fourteen months. You repay £56,000, so the money costs £16,000, about twice the cost of the Start Up Loans. Repayments rise and fall with revenue, and in this example nobody gives a personal guarantee.
  • Equity. An investor pays £40,000 for 10% of the company, and the money does not have to be repaid. If the company is later sold for £4m, that 10% is worth £400,000, ten times the cash raised.

In this example the same £40,000 costs about £8,090 as two Start Up Loans, £16,000 as revenue-based finance, or £400,000 as equity if the company is sold for £4m.

What every lender and investor checks

  • Up-to-date accounts. The bookkeeping is current and any director's loans are explained.
  • A forecast that holds up to questions. A monthly cashflow forecast with its assumptions written down, and a version showing what happens if sales come in lower.
  • Your personal credit file. For early-stage borrowing, lenders look at the founders' personal credit records, because a young company has little credit history of its own.
  • What the money is for. A specific use that suits the type of finance you are applying for.
Look at the cheaper routes first, in this order: grants, government-backed loans, asset and working capital finance, revenue-based finance, and then equity. Selling shares to pay for stock usually costs many times more than borrowing for it, as the example above shows.

Where to go next

For loans and grants, Swoop's funding platform lets a business compare loans, grants and other finance. Swoop Finance Limited is a credit broker authorised and regulated by the Financial Conduct Authority (FRN 936513). Buzz Accounting may receive a referral fee from Swoop if a facility completes. For investment, our investor readiness page covers the preparation, and our funding page explains how we help you get ready and what it costs.

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Common questions

What funding can a brand-new UK startup get?

A Start Up Loan is the usual first borrowing. It is £500 to £25,000 per founder at a fixed 7.5%, repaid over one to five years, with no application fee and up to 12 months of free mentoring. The scheme is open to businesses that have been trading for less than five years, including those not yet making sales, and each owner who helps control the business can apply, up to £100,000 for a single business. The loans are personal, so the founder owes the money even if the business closes. Grants and asset finance are also realistic well before a bank will lend, and it is worth checking whether the company can claim research and development tax relief before you raise money.

What is SEIS advance assurance?

It is HMRC's view, given before you raise, that your company and the proposed share issue look likely to qualify for SEIS or EIS investor tax relief. The law does not require it and it does not bind HMRC. Most UK angels treat it as a condition of investing, because without it they are relying on your own assessment of whether the company qualifies. Apply before you pitch and before anyone signs an advance subscription agreement (where an investor pays now for shares issued later), because HMRC reviews the actual documents and there is no way to change a term it objects to once investors have signed and paid. HMRC's own aim is to deal with most applications within 15 working days and complex ones within 40.

Do funding searches hurt my credit score?

A soft search is visible to you but not to other lenders and has no effect on your score. A hard search is recorded on your file, can be seen by other lenders and normally happens when you formally apply, so ask which kind will be run before you agree to it. This matters for early-stage founders because lenders assess a Start Up Loan, and much early bank lending, on your personal credit file. Several hard searches in a short period can suggest to lenders that you are in financial difficulty, so apply only where you meet the lender's criteria.

Should I take a loan or sell shares?

If the money buys something with a visible return, such as stock that sells, equipment that earns or a hire whose output you can measure, a loan is almost always cheaper and you keep all of the company. Selling shares suits unproven work, such as a product that may take two years to build or a market that may not respond, because fixed monthly repayments are hard to meet while revenue is uncertain. In the example above, £40,000 costs about £8,090 as two Start Up Loans and £400,000 as a 10% stake in a company later sold for £4m.

How long does startup funding take?

A loan usually takes weeks and an equity round takes months. The Start Up Loans scheme says an application can take two to three weeks if you are well prepared, and two to three months or more if you need more support. Asset and invoice finance can complete in days once the paperwork is ready. Grant competitions run to deadlines the funder publishes, and decisions commonly take three months or more. An equity round usually takes around six months from the first conversation to money in the bank. Count back from the date your cash would run out to work out when to start.

Should I sign a personal guarantee?

A personal guarantee means you repay the debt yourself if the company cannot, so it removes the protection a limited company normally gives you. Most early-stage bank lending asks for one, and a Start Up Loan is personal borrowing from the start. Before you sign, find out whether you are guaranteeing the whole facility or a capped amount, whether each co-founder can be made to pay the whole debt, and what happens to the guarantee if you leave. A guarantee on a loan for an asset that could be sold to repay the debt carries less risk than one on money already spent on wages.

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