Startup Funding: A Founder’s Guide to Raising Startup Capital

Startup funding: A founder’s guide to raising startup capital

Author: The Carta Team
Read time: 24 minutes
Published date: January 5, 2026

Learn more about the entire startup funding process, including the different types of startup capital, what to expect at each funding stage, and how to prepare for a successful fundraise.

What is startup funding?

Startup funding, or startup capital, is the money a new company raises to launch and grow, covering its initial expenses and funding operations until it can generate its own revenue. This money covers everything from building the first version of your product and hiring your initial team to renting office space and marketing. It’s the fuel that turns a great idea into a real business—an engine powered by significant capital, with startup funding in 2024 reaching nearly $314 billion.

While startup capital is necessary for growth, the source and terms of the capital you accept will directly affect your ownership and control over the company you're building. Every dollar you take from an investor comes with expectations and a stake in your company's future. Understanding this tradeoff is the first step in making smart fundraising decisions. The capital you raise is a tool, and like any tool, how you acquire and use it will determine your success.

What are the types of startup funding?

There are several common ways to secure funding for your startup from different types of investors, including bootstrapping, debt financing, and equity financing. The path you choose will affect your ownership and control over the company. Understanding these options is the first step toward making a strategic decision that aligns with your long-term vision. Each path has different implications for who owns and controls the company.

Funding type What it is Who keeps ownership?
Bootstrapping Using your own savings or cash flow from early sales to grow the business You keep all of it
Debt financing Borrowing money from a bank or lender that you must repay with interest You keep all of it, but you owe money
Equity financing Selling a piece of your company to investors in exchange for cash You give a portion to investors

As Jeff Bussgang, a general partner at Flybridge, explained during Carta’s Pre-Seed Fundraising Q2 2024 webinar, there are many ways to build a great business, and the venture capital (VC) path isn't the only one. Some founders may start their journey thinking they are a venture-backed company, only to realize another path makes more sense. The key is to make the right choices for your business day in and day out.

Bootstrapping, self-funding, and friends and family

Many founders start by using their personal savings or getting money from their immediate network of friends and family. This is often called bootstrapping. Even if the money comes from a close friend or family member, it’s important to treat these investments with professionalism. You should document every investment from day one. This avoids confusion and prevents serious legal problems down the road.

Debt and alternative financing

Other funding options include debt financing, equity crowdfunding, and small business loans and grants, such as those available through the State Small Business Credit Initiative (SSBCI) and the Small Business Administration (SBA).

While some companies explore debt financing and other funding opportunities, with government programs often backing the smallest loans—those under $150,000—for high-growth companies aiming for big scale, equity financing is the most common path.

Equity financing

Equity financing is a type of startup funding where investment firms provide capital to early-stage companies that they believe have high growth potential. In exchange for this money, the investors receive equity, or an ownership stake, in the company. This is the most common path for startups that plan to scale quickly.

What types of investors provide startup funding?

Startup capital can come from virtually anywhere, but these are some of the most common sources of financing:

How do you find the right investors?

Funding your startup is about finding the right investors to be long-term partners. The best investors bring capital as well as industry expertise, a valuable network, and guidance to help you grow. Your goal is to find someone who believes in your vision and has the experience to help you achieve it.

A walkthrough of the startup funding rounds

Now that we’ve covered the basics, we’re ready to examine the rounds of startup fundraising. Each round of funding has different goals, investor expectations, and impacts on your company’s ownership structure.

Pre-seed and seed funding: Getting your company started

If you’ve identified a market opportunity, just started building a minimum viable product (MVP), or have a prototype of your product, then your company is likely in the pre-seed or seed stage.

Pre-seed and seed funding is often used to develop your idea. Investors are betting on the founder and the market before any product-market fit is established. This stage of funding can be used for various needs, including product development or expanding the team.

Series A funding: Building on early traction

A Series A funding round is a startup's first major institutional funding round. Companies at this stage typically have revenue growth, a solid plan for scaling, and a focus on getting their product into the market.

Series B funding: Scaling the business

The Series B funding round is all about aggressive growth. Investors expect to see predictable revenue and a capable management team.

Series C, Series D, and beyond: Expanding your market

Series C funding and subsequent rounds help expand your market reach and grow your company. These stages are for well-established companies preparing for an initial public offering (IPO) or an acquisition.

How much funding does your startup need?

The right amount of funding is specific to your business's needs and goals. Before you can approach investors, you need a clear picture of how much money you need and exactly how you plan to spend it.

The right approach shows investors you've done your homework and are a responsible steward of their potential investment.

Understanding dilution

Raising money means giving away ownership of your company—a concept called share dilution. This can significantly affect a founding team's equity after each funding round.

How should you think about valuation?

Your company’s valuation is an assessment of your company’s worth, and also a direct byproduct of two factors: the amount of money raised and equity given up to investors. Valuations are fluid, and a founder may need to be flexible during fundraising.

How to prepare for your fundraise

Getting ready to raise money can feel overwhelming. Foundational steps include:

What documents do you need?

Before you start pitching investors, you need to have your key documents in order:

Developing your business plan and pitch deck

A well-crafted pitch deck is essential for communicating your vision to potential funders. It should include key slides that address:

Common fundraising mistakes to avoid

Manage your capital and ownership with Carta

Raising capital is a milestone in your startup journey. An equity management platform can help navigate the complexities of ownership, especially as a company grows.

Frequently asked questions about startup funding

These questions highlight common concerns founders have about the funding process.