BUSINESS & MONEY
Start a business in London: a practical first-year guide
London can provide customers, talent and capital, but the first job is proving that a real buyer has a painful problem you can solve.
- Decision points
- 8 useful sections
- Reading time
- 2 minutes
- Source checks
- 1 named checkpoint
- Last reviewed
- 12 SEPTEMBER 2026
Validate before building
Interview prospective customers, observe the current workaround and test willingness to pay. A brand, website and company registration are useful only when they support evidence of demand.
Choose the structure
Sole trader, partnership and limited company routes create different tax, liability and reporting duties. Use GOV.UK and qualified advice for the decision; international founders must separately confirm their right to work.
Model the first year
Include professional fees, insurance, tax, software, payment costs, marketing and personal living runway. London office space may be optional; customer access is the real asset.
Create basic controls
Separate business money, keep records, use written terms, protect personal data and understand employment duties before hiring. Clarify ownership of code, design and content created by contractors.
Raise money for a reason
Funding should accelerate a tested model, not postpone finding one. Understand dilution, investor rights, reporting and the milestones the capital must reach.
Validate demand before the ecosystem
London offers accelerators, events, investors and professional services, but joining the ecosystem does not prove that customers will pay. Define one buyer, one urgent problem and one measurable result. Run interviews and a small paid test before committing to a long programme, office or build. Record why prospects decline as carefully as why they buy; this evidence should shape product scope and pricing.
Match funding to the milestone
Bootstrapping, revenue, grants, loans, angels and venture capital solve different problems and create different obligations. Calculate the milestone, time, dilution or repayment and evidence required before pursuing a source. A grant can restrict eligible spending; investment can demand a growth path that does not fit a service business. Use official programme terms and professional advice for tax relief or regulated fundraising claims.
Build operating trust early
Separate company money, document founder ownership, use written customer terms and decide who controls code, data and accounts. Set a monthly cash view showing runway, committed costs, tax reserves and expected receipts. If personal data is processed, map the purpose, access and retention before collecting it. Buyers and investors value a small company that can explain its controls more than a large folder created during due diligence.
