Would it be an option to hire someone new that covers his workload and substract the costs from his earnings?

8 hours per day? Most people I know who started their own business, invest up to 12 hours a day into it, on most days. Have you asked your partner how he intends to proceed with your common business? Do you have it in writing somewhere that you share effort and earnings equally?

@iLuvLogix yes, but he is still a partner I mean he gets an equal part on the profit

Do you have a written contract defining roles between you? If not this gets very messy and expensive (lawyers, court etc)

@Niko1978 I edited the question, I work for about 10/12h per day + weekends, we don't have something in writing about this we only got a genteleman agreement.

What is the nature of the business? Are there business assets?

@GregoryCurrie no, like no physical assets, this is an IT company.

@JonnyCash So, there are no computers or other equipment? Does the company own any money?

@JonnyCash Also, "IT" is very vague. Are you developing software? Do you fix hardware? What do you do?

@GregoryCurrie yes, there are a few computers used by our employees and money into the company account. We do software

@jww we don't have a written agreement we started with a gentleman agreement that we share the effort and the benefits of the business.

A gentleman's agreement only works if both parties behave like "gentlemen". Which your partner doesn't. This means it's time for the two of you to get down to brass tacks and put things into writing, before you stop being friendly.

Since you don't have anything in writing I have to ask: is the company even a legal entity?

@さりげない告白 yes it is a legal company but we don't have defined the "requirements" only that we are partners.

@JoeStrazzere How does he make that happen? He only half-owns the company. He can't just wave his hand and transfer ownership to a different partner.

@GregoryCurrie - apparently they just waved their hands when they formed the "company" with nothing in writing.

In my jurisdiction, a verbal agreement is still binding.

Who determines how much time spent on the business is sufficient? Is he pulling his weight relative to the demands and responsibilities of the business? I can spend 4 hours performing work it takes another person 8 hours to complete. That doesn't mean that I'm putting in less effort and getting less done. Using time as a measure of work output and commitment to the business is bound to give you an inaccurate sense of who's doing what and how much.

@JoeStrazzere And just for the record, he does say this is a legal company. Just without written documents about what the owners are required to do. (But presumably it is clear who the owners are).

Could those downvoting and voting to close please explain? This seems like a perfectly reasonable question to me, and I'm not sure why it's being received so poorly.

@GregoryCurrie but the verbal agreement apparently was that the two partners would share equally in the effort. If the OP can establish that the other partner is not fulfilling that condition, that would provide grounds to dissolve the partnership.