Startups often look for funding in order to get their business off the ground. But what do all of those letters mean? Series A B C D and E Funding are terms that startup owners might hear frequently but not understand. We will take a brief look at each stage of funding and explain what it means for startups.
Series A Funding
In a Series A round, startups are expected to have a plan for developing a business model, even if they haven’t proven it yet. They’re also expected to use the money raised to increase revenue.
Series A is a point where many startups fail. In a phenomenon known as “Series A crunch,” even startups that are successful with their seed round often have trouble securing a Series A round. The reason for this is that investors want to see proof that the startup can generate revenue and turn a profit before they invest more money.
Series B Funding
A startup that reaches the point where they’re ready to raise a Series B round has already found their product/market fit and needs help expanding. A Series B round is a type of equity financing, in which venture capitalists invest in exchange for shares in the company.
The capital raised in a Series B round can be used to help a startup expand its operations, hire new personnel, and support other growth initiatives. While a Series B round is typically smaller than a Series A round, it is still a significant investment that can help a startup reach the next level.
Series C Funding
A company in the Series C stage is typically looking to take their product out of their home country and reach an international market. They may also be looking to increase their valuation before going for an Initial Public Offering (IPO) or an acquisition.
A Series C round is usually led by a venture capital firm. The average amount raised in a Series C round is $50 million. In order to qualify for this type of funding, a company must have reached certain milestones, such as having a working product and generating revenue.
Series D Funding
A company that raises a Series D round of funding is usually doing so for one of two reasons: either they’ve found a new opportunity for expansion and need an extra boost to get there, or they haven’t hit the expectations laid out after their previous round of funding and are looking for a way to stay afloat.
Nevertheless, if a company raises a Series D round with the intention of expanding its business, that can be seen as a positive sign by investors and potential shareholders. Therefore, it is essential for companies to be clear about their intentions for raising additional funds before going public.
Series E Funding
While it is certainly rare for a company to reach Series D funding, it is even more uncommon for them to reach Series E. This is often due to one of several factors: They have failed to meet the expectations of their investors, they want to stay private for a longer period of time, or they need a little more financial assistance before going public. Read more about Debunking Myths About Call Center Customer Support.
Final Thoughts
There you have it: a brief overview of Series A B C D and E funding. While each stage of funding comes with its own challenges and expectations, it is important for startups to understand the basics before moving forward.
Before Series A: Pre-Seed and Seed
Funding starts before Series A. The first stage is pre-seed. Founders use their own savings. They may get small sums from friends and family. Angel investors may also invest. Angels are wealthy people who back early startups. Pre-seed money is used to test an idea. The next stage is seed funding. Seed money comes from angels, seed funds, and accelerators. An accelerator is a programme that gives money and advice to early startups. Y Combinator is a well-known accelerator. Seed money is used to build the product. It is also used to find the first customers. A startup that proves its idea can then raise a Series A round. The seed stage is the riskiest for investors. Most seed-stage startups fail. That is why seed investors expect a high return if the startup succeeds.
A Correction: Series B Is Usually Bigger Than Series A
This guide says a Series B round is typically smaller than a Series A round. That is wrong. Round sizes usually grow as the company grows. A Series B round is typically larger than a Series A round. A Series C round is typically larger than a Series B round. The exact size depends on the company and the market. The guide also says the average Series C round is $50 million. That figure is rough and dated. Round sizes vary a lot by year, by sector, and by company. In a hot market, rounds are bigger. In a slow market, rounds are smaller. Do not rely on one average figure. Check current data from sources like Crunchbase or PitchBook for the latest round sizes.
What Investors Look For at Each Stage
Investors look for different things at each stage. At the seed stage, they look at the team. A strong team matters more than a finished product. At Series A, they look for product-market fit. That means customers want the product and pay for it. They also look at revenue growth. At Series B, they look at scale. Can the company grow fast without breaking? At Series C and later, they look at market leadership. Is the company a leader in its market? They also look at unit economics. Does the company earn more from each customer than it spends to get them? A startup that shows strong numbers at each stage has a better chance of raising the next round.
What Founders Give Up: Dilution
Each funding round sells shares to new investors. The founders then own a smaller share of the company. This is called dilution. It is normal. A founder who owns 100 percent of a small company may own 20 percent after several rounds. But 20 percent of a large company can be worth far more than 100 percent of a small one. Valuation matters. A higher valuation means the founders give up less for the same money. Founders should also watch the terms. Some investors ask for extra rights. These can limit what founders can do. Read the term sheet with care. Get a lawyer to check it before you sign. A bad term sheet can hurt the founders for years.
Frequently Asked Questions
What comes before a Series A round?
Pre-seed and seed funding come first. Pre-seed money comes from founders, friends, family, and angels. Seed money comes from angels, seed funds, and accelerators. It is used to build the product and find the first customers.
Is a Series B round smaller than a Series A round?
No. Round sizes usually grow as the company grows. A Series B round is typically larger than a Series A round. A Series C round is typically larger than a Series B round.
What do investors look for at Series A?
They look for product-market fit and revenue growth. They want proof that customers want the product and will pay for it.
What is dilution?
Dilution is when founders own a smaller share of the company after each funding round. It is normal. A higher valuation means the founders give up less for the same money.
What is an accelerator?
An accelerator is a programme that gives money and advice to early startups. Y Combinator is a well-known accelerator. Seed money is often raised through accelerators.
Disclaimer: This guide is for general information only. This guide gives no investment advice for readers. Funding round sizes and terms vary by year, sector, and company. Check current data from sources like Crunchbase or PitchBook.
Last Updated: 6 November 2026