There's no one-size-fits-all answer to this question, as the amount of start-up capital you'll need will vary depending on the type of business you're starting, your industry, your business model, and a number of other factors. However, there are some general guidelines you can follow when it comes to calculating your start-up capital needs.
First, you'll need to estimate your business's total start-up costs. This will include things like the cost of renting or purchasing office space, the cost of buying or leasing equipment, the cost of hiring staff, and any other one-time expenses you can think of. Once you have an estimate of your total start-up costs, you'll need to determine how much of that you can cover with your own savings, and how much you'll need to raise from other sources.
If you're starting a relatively simple business and you have a decent amount of savings, you may be able to cover most or all of your start-up costs yourself. However, if your business is more complex or you don't have much in the way of savings, you'll likely need to seek out investors or take out a loan to cover the shortfall.
Once you've determined how much start-up capital you need, you can begin looking for sources of funding. If you're going the investor route, you'll need to put together a pitch deck and start meeting with potential investors. If you're taking out a loan, you'll need to compare offers from different lenders and choose the one that's right for you.
No matter what route you decide to go, raising start-up capital is always a challenge. But if you put in the hard work and prepare in advance, you should be able to find the funding you need to get your business off the ground.