If and when you hire an employee. How much money should you be making? Let's say that your business makes $X. You take $Y and your employee takes $Z. Obviously, $Y + $Z needs to be greater than $X, but how much (in terms of percentage)?

You need to find out the right tax% but I have heard, that there is only a point to hire and employee if s(he) earns the salary 2,5X.

So if employee cost you 1000, s(he) needs to earn her/his salary PLUS 1500=2500
Of course different company has different policy.

Hi

The earnings multiples generally vary according to the seniority of the post ie. a junior post would be 3 to 5 times and a senior post 2 to 3.

I'm a little confused.

Suppose that you're a one man/woman company and looking to hire an employee whose salary is $1000. Let's just say that your salary is also $1000. How much should the company be making at this point?

Well I wasn't counting what you earn at all.
But I know that lot's of small companys won't hire a person before that person will make profit. So if you pay 1000 to someone you expect him/her to earn to the company 2500. That will pay that persons salary and company also get their profit. But of course sum can vary, some are ok with less profit.
As I see it's quite simple. Let's say emplyee wants $1000 and from every client you get $500. That means that he needs to end the deals with 5 clients in a month to be useful to you. Of course you need to pay tax from that profit.
If you want him/her to earn also your salary that means $2500+$1000 (your salary)=$3500
I could say that with that money (3500) you would be in the safe side. But as much there are companies, there will be different methods to count the profit.

So, very very very roughly speaking, if your company makes your new employee's salary x 3 and a little more while there are only you and your new employee, the company's finance looks ok then?