At the beginning of any business partnership, the partners usually envision a long-term relationship, this is clear because they all invest time and money in getting the venture started. In reality, very few partnerships succeed beyond 12 months. This is often due to expectations not being met or personal issues arising. Hint: This is why wwe always insist you get your partnership agreement in palce so that you are protected legally. If you wish to leave the partnership you must end things amicably with the other partner and ensure your share of liabilities to the point of leaving are met. Then, on your tax return you must inform HMRC of the date of cessation. However, it is possible there may be some financial gain in you leaving the partnership. This could be by way of the other partner(s) buying you out. If the company is making money this should  not be a problem, however if the company is struggling, realisitically a buy-out is not viable. To ensure that no obligations exist upon you on leaving the partnership, we highly insist that you consult a lawyer, you may just thank us for this advice!