Should I incorporate my company before building?
Most first time founders register a company too early. I think that's one of the easiest mistakes to avoid. Here's when I'd incorporate, and why I'd wait.

Short Answer No. I wouldn't register a company until someone is willing to pay for what I'm building. A company doesn't make your idea more real. Customers do. Until then, you're only adding paperwork, costs, and stress to something that might never become a business.
Why I think this? One thing I've noticed is that first time founders love doing things that make them feel like founders. Choosing a company name. Buying a domain. Designing a logo. Registering a Private Limited company. Even thinking about trademarks. I get it. Because I've been there and done that already. It feels like progress. But most of the time, it isn't. Recently, one of my friends wanted to start a D2C brand selling premium room fresheners. We spent weeks thinking about the idea. We found the products. We came up with the brand name. The story. Who we'd sell to. Everything looked very very good on paper. He got the products manufactured, labels with gold leafing were made, premium packaging was ready. He was so convinced this would become a big company that he registered a Private Limited company before selling a single product. His thinking was simple. "If I want to raise money one day, I'll need a Private Limited company anyway." The products launched. People bought them. Customers actually liked them. For a moment, it looked like everything was working. Then reality kicked in. Meta ads were expensive. Content agency, Meta ads guy, and other force took a lot of money each month from his pocket. Marketplaces charged their commissions. Quick commerce platforms took a big cut. He was getting orders, but losing money on almost every one. After a few months, he made the difficult decision to shut the business down. The product didn't survive. The company did. xD Even today, that Private Limited company still exists. Not because he wants it to. Because shutting it down is much harder than starting it. He still has to file returns. Maintain compliance. Wait for the required period before he can even begin closing it properly. Registering the company wasn't the mistake. Registering it before proving the business was. If I were starting from scratch... I'd keep things as simple as possible. I'd buy the domain if I loved the name. That's cheap. I'd build a landing page. Talk to customers. Try to make my first sale. Then my second. Then my tenth. Only after I knew people were willing to pay would I think about incorporating. At that point, the paperwork has a purpose. You're building a business that's already alive, not preparing one that might never exist.
FAQs
When should I register my startup?
I'd register when the business has a reason to exist as a formal entity. That could be because you're getting regular customers, taking payments, signing important contracts, bringing in a cofounder, hiring people, or preparing to raise money. Before that, registration can simply create work around a business you haven't proved yet.
What happens if I register a company and my startup fails?
The startup can fail while the company continues to exist. That's the part many first time founders don't think about. You can be left with filings, accounting, compliance work, and the process of closing the entity even though the product is gone. That's why I wouldn't incorporate just to feel like the startup has started.
Do I need a private limited company before raising funding?
If you're planning to raise institutional startup funding in India, a Private Limited Company is often the structure investors expect, but I wouldn't create one simply because you might raise money someday. First get enough proof that raising money makes sense. When an actual investor, funding program, or deal requires a specific structure, that's a much better reason to incorporate.