How to Apply to Y Combinator in 2026: Every Question, Answered

Y Combinator is the most-applied-to accelerator in the world, and it's also one of the most transparent about what it wants. The application is a single online form, reviewed by partners who have read tens of thousands of them. This guide walks through the process, the deal, every major question on the form, and how to answer each one so a partner understands your company on the first read.

If you want the raw list first, every question on the current form — with its character limit — is on our Y Combinator program page.

How the YC application process works

YC takes applications four times a year, one for each batch: Winter, Spring, Summer and Fall. Each batch has an on-time deadline. Applications submitted before it are reviewed together and get a decision by a published date; late applications are still accepted and read, but on a slower, rolling basis.

The process has three stages:

1. The written application. One form, plus an optional (but strongly recommended) one-minute founder video.
2. The interview. If partners want to know more, they invite you to a short interview — about 10 minutes, almost all questions, no slides.
3. The decision. Usually the same day as the interview, or shortly after.

Speed matters at every stage. Paul Graham's original advice on applying still describes the reality: partners spend about 20 seconds deciding whether they understand your idea, and a few minutes on the whole application. Your job is to be understood instantly.

The YC deal

YC's standard deal is $500,000, in two parts:

• $125,000 on a post-money SAFE for 7% of your company.
• $375,000 on an uncapped SAFE with a "most favored nation" (MFN) provision. It converts on the terms of the best SAFE you issue before your priced round (the lowest cap, or a discount).

So the 7% is fixed, and the second part costs you whatever your next round's investors pay. YC charges no fees. If you're unsure how SAFEs and MFN clauses work, read our guide to SAFEs and accelerator deal terms.

The questions that matter most

The form has more than twenty questions. Most are logistics. These are the ones that decide whether you get an interview.

"Describe what your company does in 50 characters or less."

This is the first thing a partner reads, and it's the hardest field on the form. Fifty characters is about seven words. Name the customer and what you do for them:

• Good: "Payroll for restaurants in Mexico"
• Good: "Shopify for independent pharmacies"
• Weak: "AI-powered platform for the future of work"

If you can't write this line, you probably don't yet know who your first customer is. We wrote a full guide on how to write a startup one-liner.

"What is your company going to make?"

Describe the product concretely: what a user does, what happens, and why it's better than what they do today. Avoid market-size sentences and buzzwords here — this answer is about the thing itself. A good test: could a smart friend outside your industry explain your product back to you after reading it?

"Why did you pick this idea to work on? How do you know people need what you're making?"

YC is testing founder–market fit and evidence of demand. Strong answers combine:

• Personal proximity — you worked in the industry, had the problem yourself, or have unusual access to the customers.
• Evidence — user interviews, a waitlist, letters of intent, people paying for a rough version.

"We saw a big market" is not a reason. "I ran operations for 40 restaurants and watched every one of them do payroll in spreadsheets" is.

"Who are your competitors? What do you understand about your business that they don't?"

Never write "we have no competitors." Every customer is solving the problem somehow — with a spreadsheet, an agency, a legacy vendor, or by ignoring it. Name those, then spend most of the answer on the second half of the question. The insight should be specific and a little surprising: something you learned from customers that incumbents can't or won't act on.

"Are people using your product?" and "How do or will you make money?"

Lead with numbers. Users, active users, revenue, week-over-week growth, retention — whatever you have, stated plainly. If you're pre-launch, say what you've done instead (pilots, a waitlist, paid pre-orders) and when you'll launch. For the money question, give a price and a rough calculation of how big it can get: number of potential customers × what each would pay.

"How long have each of you been working on this? How much of that has been full-time?"

Be exact: months, not "a while." YC also asks who writes the code and whether any of it was done by non-founders. Technical founders who have built the product themselves are one of the strongest signals on the form. If you outsourced development, say so honestly and explain the plan.

The one-minute founder video

It's optional, but YC has said it's much more likely to interview founders who submit one. Keep it simple: all founders on camera, talking naturally for one minute about who you are and what you're building. No slides, no music, no script reading. The video exists to show how you communicate and how the team works together.

"If you had any other ideas you considered applying with, please list them."

Partners sometimes fund strong founders with a weak idea and read this field to see how you think. List one or two real alternatives, briefly.

What a strong answer looks like

Here's the same answer written two ways, for a fictional payroll startup (all names and numbers are made up).

"Why did you pick this idea?" — weak:

We are passionate about fintech and saw a huge opportunity in the payroll market, which is worth billions. Small businesses struggle with outdated tools, and we believe technology can transform how they pay employees.

Strong:

I ran operations for a group of 40 restaurants in Mexico City for three years. Every one of them did payroll in spreadsheets, and tip-splitting errors caused a staff dispute nearly every week. We built a WhatsApp-based payroll tool for our own restaurants first; 12 other restaurants asked to use it within two months, and 9 now pay us $60/month.

The strong version answers the question, shows personal proximity to the problem, and ends with evidence — all in four sentences.

What YC looks for

Across its essays and talks, YC consistently emphasises a handful of things:

• Founders who build. Technical founders who ship quickly are the strongest signal on the form.
• Clarity. If you can explain your company simply, you probably understand it.
• Evidence of demand. Users, revenue, growth, or at least proof that people want what you're making.
• Formidability. Founders who get things done despite obstacles. The question about something impressive each founder has achieved exists to find this.
• A real insight. Something true about your market that most people don't see yet.

Every answer on your application should give a partner evidence for at least one of these.

After you submit: the YC interview

If partners want to meet you, you'll get an interview invite, usually a week or two before decisions. The interview is short — around ten minutes — and it's almost entirely rapid-fire questions. There's no pitch and no deck.

Expect the same themes as the form, asked faster:

• What are you building, and who exactly is it for?
• How many users do you have, and how fast are you growing?
• What's the hardest part of what you're doing, and why are you the people to do it?
• Who are your competitors, and what do they get wrong?
• How will you make money?

Prepare by having a friend fire these at you for ten minutes, and practise answering each one in a sentence or two. The founders who do best answer directly, give a number when one exists, and say "I don't know" when they don't.

Should you apply alone?

You can apply as a solo founder, and YC funds solo founders. But the form asks whether you're looking for a co-founder, and partners pay close attention to how a team was formed and how long its members have known each other. If you have a co-founder, explain how you met and what you've built together.

Common mistakes

The patterns that sink applications are remarkably consistent: vague descriptions, inflated metrics, "no competitors", buzzwords, and answers that repeat each other. We collected the most common ones in 15 YC application mistakes that get founders rejected.

Timeline: when to start

Start two to three weeks before the deadline:

1. Week 1: Write the 50-character description and the "what are you making" answer. Rewrite them until a stranger understands them.
2. Week 2: Draft every other answer. Pull real numbers from your dashboards.
3. Week 3: Record the video, ask two founders who've been through YC to read your application, and cut every sentence that doesn't add information.

Submit before the on-time deadline, and update your application if something significant happens before decisions — a big customer, a launch, a jump in revenue.

Apply to more than one program

Even excellent companies get rejected by YC; acceptance is in the low single digits. Founders who raise successfully tend to run several applications in parallel. Many of YC's questions recur on other forms — Techstars, a16z speedrun, 500 Global — so the work you do here carries over. That's what Applyseed is for: one profile, drafted into each program's own questions and limits.