What is a start-up?

Claudia AinsleyWritten byClaudia Ainsley
Reviewed byMatt Leeburn
Updated 26 Aug 2026

A start-up is a new business built to find a repeatable, scalable business model under uncertainty, marked by innovation, growth intent and rapid testing rather than steady income.

Also known as: startup, start-up company, tech start-up

Key points

  • Start-ups chase growth metrics such as customer acquisition cost, lifetime value and churn, while a typical small business prioritises steady income.
  • They usually progress from ideation to a minimum viable product, then growth, scaling and an exit such as acquisition or IPO.
  • Finance options range from bootstrapping, angels and venture capital to government grants, the R&D Tax Incentive and debt once revenue exists.
  • Choosing a structure early and signing a founder agreement with equity split, vesting and IP assignment reduces the risk of cap table disputes later.

How a start-up differs from a small business

Typical start-up stages

Structure, IP and finance options

Not to be confused with

Small and medium-sized enterprises (SMEs)
an SME is classed by its size, whereas a start-up is defined by growth intent and its search for a scalable business model

Frequently asked questions

How is a start-up different from a small business?

A start-up is built for fast growth and scalability, often with external investment, and frequently plans for an exit such as an acquisition or IPO. A small business more often aims for stable income and the owner's lifestyle, finances itself through loans or the owner's money, and may stay owner-operated indefinitely.

When should I incorporate a company for my start-up?

Incorporate when you need limited liability, plan to take on external equity or want to issue shares. Early incorporation keeps the cap table clean and gives investors confidence, and delaying it can complicate equity allocations later. Talk to a lawyer or accountant about structure early.

What funding options are available for early-stage start-ups?

Bootstrapping, friends and family, angel investors, venture capital, government grants and the R&D Tax Incentive, crowdfunding, and debt or invoice finance once you have revenue. Early on, bootstrapping plus angel investment is common while you find product-market fit; venture capital usually comes in once growth is scalable. Each option trades control, dilution and speed differently.

Do start-ups need to register for GST?

Only once your GST turnover meets or exceeds the ATO registration threshold. Monitor your sales as they grow, register when you cross the line, and then lodge a BAS. If you employ staff you also need to handle PAYG withholding, payroll and superannuation, so set up simple accounting processes early.

What is a founder agreement and why do I need one?

A founder agreement documents each founder's equity split, role, vesting schedule, IP assignment and how disputes are resolved. It prevents misunderstandings, protects both the company and the founders, and shields the company from early departures. Typical vesting runs four years with a one-year cliff.

Go deeper

Sources

This article is general information only and is not financial advice.