Your business partner is leaving, and you found out in a conversation you did not see coming. Maybe it was a text late on a Sunday, maybe a calm sentence over coffee that ended with "so I think I am out". Either way you are now running a business that was built for two, and you do not yet know what is yours, what is theirs, or what to do on Monday morning.
When a business partner is leaving, the first two weeks decide how messy it gets. Before anything is agreed, protect what keeps the business running: who can move money, who holds the clients and the logins, what your agreement says about an exit, and who will advise you. Questions of value and blame come later.
This guide covers how to tell what kind of exit you are facing, why partnerships come apart, what it costs to drift, what to do in the first two weeks with what you already have, what to do if your partner has already gone, and how to set things up so the next change is calmer. It is general guidance, not legal or financial advice for your situation, and the rules differ by country, by state and by the kind of business you have. A lawyer and an accountant come up more than once below, on purpose.
Is this you?
- Your partner has said they want out, or has started talking about "stepping back" without saying what that means.
- You share a bank account, a card or a payments login, and either of you could move money today without the other knowing.
- You are not sure whether you ever signed a partnership agreement, an operating agreement or a shareholders' agreement, or where it is.
- Some clients think of the business as your partner's, and you are not sure they would stay.
- The domain, the email, the accounting software or the social accounts are registered in one person's name.
- Or it is the other way round: your partner has done almost nothing for weeks, every check-in brings a new reason, and you are the one thinking about walking away.
If your biggest client just left rather than your partner, start with when one client is half your income instead. This piece is for the case where the person you built the business with is leaving it, or where you are about to.
Why it happens
People change faster than agreements do
Most partnerships start with two people who want the same thing at the same moment. A few years later one has children, or a health scare, or a better offer, or simply a different idea of how big the business should be. None of that is a failure. It is what happens to people over time. The business was set up for who you both were on day one, and it often has nothing written down for who you are now.
Uneven effort turns into resentment before anyone says it
The most common story is not a sudden betrayal. It is a slow gap between how much each person puts in and how much each person takes out. One partner carries the clients, the other the admin, and each quietly believes they do more. By the time someone says "I want out", they have usually been rehearsing it for months, which is why it feels sudden to the person hearing it.
Nobody wanted to write the exit terms at the start
Agreeing what happens if one of you leaves feels like planning a divorce at the wedding, so many partners skip it or download a template and never read it. That is understandable, and it is the single biggest reason an exit gets expensive. Without written terms, the default rules of wherever you are registered decide things like who can still act for the business and how the leaving partner's share is handled, and those defaults were not written with your business in mind.
Avoidance makes it worse
When the subject is painful, it is natural to put off the conversation, the call to the bank and the look at the numbers. That is a very ordinary reaction, and it is exactly what lets small risks, like a shared card or a client who has not been told, become large ones.
What it costs if nothing changes
Your partner may still be able to commit the business. This is the part most people do not know. In many places, a partner who leaves can still bind the firm to people who do not know they have gone. In the UK, section 36 of the Partnership Act 1890 lets someone dealing with the firm treat the old partners as still being partners until they have notice of the change. In the US, most states follow a version of the Uniform Partnership Act. Iowa's, for example, keeps a partnership bound by a departed partner's acts for two years after they leave where the other party reasonably believed they were still a partner and had no notice, while Florida's version uses one year. The detail varies, which is the point: until people are told, the risk stays open.
Money moves while you are still talking. A shared account with single signatures means either of you can pay, withdraw or borrow without the other. Most partners would never misuse that. But in an emotional fortnight, even well-meant moves, such as a partner paying themselves what they believe they are owed, can start a dispute that costs more than the money.
Clients hear it from the wrong person. If a client learns about the split from a rumour, or from two different versions, they start to wonder whether their project is safe. Some will follow whichever partner they trust most. Some will quietly go elsewhere.
Decisions get made in anger. Promises in a heated conversation, a resignation email sent at midnight, a client poached out of spite. These are hard to undo, and lawyers are expensive partly because they spend time unpicking them.
And it costs you. Sleep, focus, sometimes a friendship that mattered more than the business. That cost is real, and it is a reason to slow down rather than to rush.
What to do in the first two weeks, with what you already have
You do not need to settle anything yet. You need to stop the situation from getting worse while you find out where you stand. Work through these in order.
1. Do not sign, promise or announce anything for a few days
Say that you have heard them, that you want to do this properly, and that you need a few days to look at things. Then write down, the same day, what was said, by whom and when. A plain dated note is enough. It helps you think, and if things become difficult later, notes made at the time carry more weight than memory.
2. Find the agreement, and read the exit part
Look for a partnership deed or partnership agreement, an LLC operating agreement, a shareholders' agreement or your company's articles. Look for the sections on leaving, retiring, notice periods, how a share is valued, who can buy it and over what time, and any promise not to take clients or staff. If you find nothing, that does not mean there are no rules. It means the default law of wherever the business is registered applies, and that is the first question to take to a lawyer.
3. Put the money on hold, together
List every bank account, card, payment processor, loan and line of credit, and who can authorise payments on each. Then propose, in writing, a holding arrangement for the next few weeks: both of you approve any payment above an agreed amount, nobody takes on new borrowing, and drawings stay at their normal level. Ask your bank what it can do, such as requiring two signatures. Do not empty or freeze an account on your own: depending on your agreement and where you are, that can be a breach of your own duties to the business, so take advice before doing anything one-sided.
4. Take a snapshot of where the business stands
Pick a date, ideally the day you were told, and write down the position on that day: every bank balance, every invoice clients still owe, every bill you owe, deposits you are holding, work in progress and anything ordered but not delivered. This is the starting point for every later conversation about what the leaving partner is owed, and an accountant can work from it far more cheaply than from a reconstruction months later. If your books are behind, keeping your own books when you have an accountant lists the five numbers to get straight first.
5. List the clients, and who each one really deals with
Go through every active client and note which of you they deal with and what they are owed or owe. Then agree, if you can, one message that both of you will send: the date of the change, who is looking after their work, and that nothing about their project changes. A joint message is the strongest signal of stability a client can get. If you cannot agree one, say nothing to clients until you have had advice, rather than racing each other.
6. List every login and who owns it
Domain registrar, website hosting, business email, accounting and invoicing software, payment processors, social accounts, the shared password manager, supplier portals. For each, note whose name the account is in and who has the password. You do not need to change anything yet, and changing a shared password without agreement can inflame things. But you need to know, because whoever controls the domain and the email controls how clients reach the business.
Work out how long the money lasts if your partner's share stops
The Burn Rate Calculator takes your cash, your monthly costs and your income and tells you how many months you have. Run it twice: once as things stand, and once with your partner's contribution, clients or capital taken out. The difference is the number to take into your first conversation with your accountant.
7. Tell the people who need to know, in the way the rules expect
Once you have advice on timing, the formal notices are what close the open risk described above. What applies depends on how the business is set up. Some common examples:
- UK partnership. Tell existing clients and suppliers directly. For people who have not dealt with the firm before, a change in the members of a partnership notice in the Gazette counts as notice under section 36(2) of the Partnership Act 1890.
- UK limited company. If your partner was a director, you must tell Companies House within 14 days of changes to directors and to people with significant control.
- US general partnership. Many states let either the partnership or the departing partner file a statement of dissociation. In Florida, for example, a person who is not a partner is deemed to have notice 90 days after it is filed. Your state's rules may differ.
- US business with an EIN. If the departing partner was the responsible party on the EIN, the IRS says changes in responsible parties must be reported within 60 days on Form 8822-B.
Your bank, your insurer and any lender will also need to know. A lawyer can tell you which of these apply to you and in what order.
8. Get your own advisers
Book a business lawyer who handles partnership or shareholder exits where you are, and talk to your accountant about the snapshot from step 4. If your partner wants to use the same lawyer to save money, it is usually better that each of you has your own: your interests overlap, but they are not the same. If a lawyer feels out of reach, many professional bodies run referral services, and a first fixed-fee consultation is common. Bring the agreement, the snapshot, the client list and your notes, and the meeting will be shorter and cheaper.
If your partner has already gone
If they left and simply stopped turning up, keep running the business, keep your notes, and write to them asking for a conversation about the terms of their exit. Do not wait months for them to come back to it. The longer nothing is agreed, the harder it is to separate what they are owed from the work you did after they left.
If money has moved that you did not agree to, do two things first: write down exactly what moved, when and from which account, and speak to a lawyer before you reply. Then ask the bank about tightening authorisations. An angry message feels good for an hour and can cost you a great deal in a dispute.
If they have taken clients, check what your agreement says about soliciting clients after leaving, and get advice before you accuse anyone. Clients are free to choose who they work with, and some will follow the person rather than the name. Your energy is better spent keeping the clients who stayed and replacing the ones who did not. The One Client Risk Check shows how much of your income now rests on the clients who are left.
If you cannot agree on anything, mediation is often cheaper and faster than going to court, and many partnership agreements require it before any claim. A lawyer can suggest a mediator who handles business disputes.
If you are the one leaving, because you have been carrying the business while your partner drifted, the same steps apply from the other side. Write down what you have each contributed over the last year, in hours, clients and money. Read the agreement before you resign from anything. Take advice on how to leave without giving up what you are owed, and give clients the same calm, joint message you would want to receive.
How to stop it recurring
Whether you carry on alone, bring in a new partner or start something else, these make the next change smaller.
Write the exit terms while everyone is friendly. Notice period, how a share is valued, who can buy it, how it is paid for and over what time, who keeps the name and the clients. A lawyer can turn that into a buy-sell clause. It is far cheaper than the dispute it prevents.
Set money rules now. Two approvals for payments above a set amount, agreed drawings, and no borrowing without both of you. These protect a partnership from mistakes as much as from bad faith.
Keep business accounts in the business's name. The domain, the email, the software and the social accounts belong to the business, with at least two people able to get in. A shared password in one person's head is a single point of failure.
Look at the numbers together every month. Revenue, what clients owe, cash in the bank and who did what. Monthly is often enough to spot a gap in effort or expectations while it is still a conversation rather than a resignation. A simple business budget gives that conversation a shape.
Give each person their own login. This is the one place software removes part of the problem. When everyone signs in as themselves, removing someone's access is one switch rather than a scramble to change a shared password. In Billbooks, every paid plan includes more than one user, so each partner gets their own sign-in and the invoice history stays with the business. A spreadsheet and separate email accounts can do much of the same job, and if that is what you have, the habit matters more than the tool.
A plain note to finish: this is general guidance, not legal, tax or financial advice for your situation. Partnership and company rules differ by country and by state, and an exit can affect tax for both of you. Talk to a lawyer about the agreement and the notices, and to an accountant about the figures, before you sign anything. If the stress is affecting your sleep or your health, talking to your doctor or a counsellor is as practical a step as any on this list.
Two free checks for the week your partner says they are leaving
Frequently asked questions
What should I do first when my business partner is leaving?
Slow down and protect the basics before agreeing anything. Write down what was said, find your partnership or shareholders' agreement and read the exit terms, list every bank account and who can authorise payments, take a dated snapshot of balances and what clients owe, and book your own lawyer and accountant. Value, blame and who gets what can be settled once those are in place.
Can my business partner still sign contracts after they leave?
In many places, yes, for a while, if the other party does not know they have gone. In the UK, section 36 of the Partnership Act 1890 lets people treat old partners as still being partners until they have notice of the change. In US states that follow the Uniform Partnership Act, the period is set by statute, for example two years in Iowa and one year in Florida. Telling clients and suppliers, and filing any notices that apply, closes that risk.
What happens if we never signed a partnership agreement?
The default law of wherever the business is registered fills the gap. That law decides things like how a departing partner's share is treated and whether the partnership continues or has to be wound up, and it may not match what either of you expected. It does not mean anything goes. Take the question to a business lawyer before you agree terms.
Should I freeze the business bank account?
Not on your own without advice. Acting one-sidedly on a shared account can breach your duties to the business, depending on your agreement and where you are. A safer first step is to propose, in writing, that both of you approve payments above an agreed amount and that nobody takes on new borrowing, and to ask the bank whether it can require two signatures.
How do we tell clients a partner is leaving?
Ideally with one joint message from both of you, sent at the same time, saying when the change happens, who is looking after their work and that nothing about their project changes. A calm joint message tells clients the business is stable. If you cannot agree one, hold off contacting clients until you have had advice, rather than sending competing versions.
Do I need a lawyer when a business partner leaves?
For anything beyond a very small and friendly split, yes. A lawyer can tell you what your agreement or the default law says, which notices you must file and when, and how the departing partner's share should be handled. It is usually better for each partner to have their own lawyer, because your interests overlap but are not the same. An accountant should value the business and handle the tax side.
What if I am the partner who wants to leave?
The same steps apply from the other side. Read the agreement before resigning from anything, write down what each of you has contributed over the last year, take advice on how to leave without giving up what you are owed, and agree a joint message to clients. Leaving calmly and in writing protects you from being held responsible for decisions made after you have gone.
The one thing to do today
Find your partnership, operating or shareholders' agreement and read the part about someone leaving. If you cannot find one, write that down too. Either way, by tonight you will know whether your exit is governed by terms the two of you chose or by default rules, and that is the first thing a lawyer will ask you.
This is one of the problems in our when things go wrong collection, alongside the other problems that tend to arrive without warning.
