Early‑stage startups often focus on product development and fundraising, but overlooking intellectual property (IP) can seriously damage long‑term value. This article explores five common IP mistakes startups make, with a particular focus on patents. It covers the risks of filing patents without professional advice, making public disclosures too early, failing to put enforceable contracts in place with third parties, misunderstanding what patent rights actually provide, and neglecting to develop a clear IP strategy. By highlighting these pitfalls and offering practical guidance, the article helps startups protect their innovations, strengthen their commercial position, and improve their prospects with investors.