The ideal time to start planning for retirement is as early as possible. Generally, it is recommended to begin saving for retirement in your 20s or 30s, depending on your financial situation and goals. This allows you to take advantage of compound interest and grow your savings over a longer period. However, it's never too late to start planning, even if you're in your 40s or 50s. The key is to create a retirement plan that takes into account your current financial situation, desired retirement age, and lifestyle goals. This may involve setting up a retirement account, such as a 401(k) or IRA, and regularly contributing to it. Additionally, consider diversifying your investments and creating a budget to help you save more efficiently. It's important to review and adjust your plan periodically to ensure you're on track to meet your retirement goals.