7 Things to Settle in Your Books Before You Take On a Business Partner
Sam's List Editorial | 2026-08-13
Most partnership disputes are not about strategy. They are about a number nobody wrote down.
Adding a business partner is an accounting event before it is a legal one, and the sequence matters. The operating agreement records what you agreed to. The books determine what you were actually agreeing about, which is why signing first and reconciling later is how two reasonable people end up with two honest and incompatible versions of the same deal.
Here are seven things to settle in your books first. None of them are hard. All of them are much harder in year three.
1. Opening Capital Accounts
A percentage is not a capital account, and confusing the two causes more partnership friction than any other single issue.
Ownership percentage is the default driver of your share of profits and, usually, your vote. In a partnership or multi-member LLC it is only a default, because allocations follow the operating agreement and can be disproportionate to percentage if the agreement is drafted to meet the substantial economic effect rules. A capital account is a different thing entirely: it tracks what each owner has actually put in and taken out, meaning contributions, allocated income, and distributions, cumulatively. Two partners can hold 50 percent each and have wildly different capital accounts, and that difference determines who gets what if the business is sold or wound down.
Set opening balances explicitly, in writing, in the books, on day one. If the incoming partner contributes cash and you contribute the existing business, those are different kinds of contributions with different values, and pretending otherwise is a decision you are making by default.
2. Personal Expenses Cleaned Out
Every personal expense running through the business becomes a shared expense the moment someone else owns part of it.
The car, the phone, the meals, the family member on payroll who works ten hours a month. These are ordinary in a single-owner business, and some may be legitimately deductible. What changes is that your new partner is now funding half of them, and they will notice, usually about four months in and usually in a tense conversation.
Clean this up before diligence, not during. Either move the expense out of the business, or name it explicitly in the agreement as an owner benefit with a value attached. Both are fine. Silence is not.
3. A Real Valuation of What You Are Selling
If someone is buying 25 percent of your business, you need a defensible number for the whole business, and "three times revenue because that is what I read" is not defensible.
The number that matters is usually adjusted earnings: net income normalized for owner compensation at market rate, one-time items, and the personal expenses from the previous point. That normalization is exactly the work a buyer's accountant will do, so doing it yourself first means you negotiate from the same numbers instead of arguing about which set is real.
Be honest about the limits. Small private company valuation is a range, not a point, and the range is wide. The goal is a documented method you can both defend, not false precision.
4. Work in Progress and Unbilled Revenue
This is the item most often missed, and it is often the largest.
If you have delivered work you have not invoiced, or collected deposits for work you have not delivered, those balances belong to a specific period and a specific set of owners. A partner joining in July should not receive a share of margin earned in March, and should not inherit an obligation to deliver against a deposit you already spent.
Cash-basis books hide this almost completely, which is why the conversion to accrual, at least for the transaction, is worth doing. Record unbilled work as an asset and customer deposits as a liability, then decide explicitly how each is allocated at closing.
5. How Distributions and Guaranteed Payments Will Work
Decide before the first profitable quarter, because after it the conversation is about money that already exists and someone's expectations are already set.
There are two distinct mechanisms and they are frequently conflated. Guaranteed payments compensate a partner for services or capital regardless of profitability, so they function economically like a salary. They are not wages, though, and that distinction has teeth: there is no payroll withholding, the amount is reported to the partner on a Schedule K-1 rather than a W-2, it is generally subject to self-employment tax at the partner level, and it is generally excluded from qualified business income. Distributions are different again: they are returns of profit or capital rather than compensation. A working partner and a passive investor usually need different combinations of the two.
Also decide what happens in a year with taxable income and no cash. Pass-through owners owe tax on allocated income whether or not it is distributed, and a partner who receives a tax bill without the cash to pay it will not remember that they agreed to the structure.
6. The Entity and Election Consequences of Going From One Owner to Two
Adding an owner can change what your business is for tax purposes, and the change is not always the one people expect.
A single-member LLC is generally disregarded for federal tax purposes and reports on the owner's return. Add a second member and it typically becomes a partnership, with its own return, its own filing deadline, and Schedule K-1s to issue. An S corporation adding a shareholder has to confirm the new owner is an eligible shareholder, because most entities and nonresident aliens are not, and an ineligible shareholder can terminate the election. Note that a US citizen living abroad is generally still eligible; it is alien status, not physical location, that matters.
Each of these has real consequences for filing obligations, self-employment tax treatment, and state registrations. Sort out the structure before the closing date, since some elections are time-sensitive and a few are difficult to unwind.
7. Contributed Property Recorded at Basis
When a partner contributes property instead of cash, meaning equipment, a vehicle, software, or intellectual property, the accounting is not "what we agreed it is worth."
Property contributed to a partnership generally carries over the contributing partner's tax basis rather than stepping up to fair market value, and the difference between agreed value and tax basis has to be tracked because it affects future allocations of depreciation and gain. Recording the asset at the agreed value in the tax books, which is the intuitive move, creates a discrepancy that surfaces years later when the asset is sold.
Book value and tax basis can differ legitimately. They just both need to exist.
Getting the Books Ready Before the Conversation
The pattern across all seven items is the same: the books are the negotiation, and whoever brings clean ones sets the terms.
Purewater Financial is a paying Sam's List partner firm based in New York, in practice since 2020, working with small business owners, VC-backed startups, real estate investors, and solopreneurs. That range is relevant here, because the capital account, contribution, and election questions above are the same questions that come up in every early equity transaction regardless of industry. It is featured because it fits the topic and did not pay a fee to be included in this article.
Getting professional help before you sign improves the odds that the deal you document is the deal you intended. It does not remove the risk that a partnership goes badly for reasons no ledger predicts, and it does not substitute for a lawyer drafting the agreement itself. Compare a few firms on the Sam's List accountant directory and ask specifically whether they have set up capital accounts for a partner buy-in before.
Frequently Asked Questions
What is a partnership capital account and why does it matter? A capital account tracks each owner's cumulative contributions, allocated share of income, and distributions. It is separate from ownership percentage, and it typically governs what each partner receives if the business is sold or liquidated. Two equal partners can have very different capital accounts, which is why opening balances should be documented at the start.
Does adding a partner to my LLC change my taxes? Usually yes. A single-member LLC is generally disregarded and reports on the owner's personal return, while a multi-member LLC is typically treated as a partnership with its own return and Schedule K-1s for each owner. Filing obligations, deadlines, and sometimes self-employment tax treatment all change, so confirm the effects before closing.
How should we value the business when someone buys in? Most small company valuations start from adjusted earnings, meaning net income normalized for market-rate owner compensation, one-time items, and personal expenses run through the business. The result is a defensible range rather than a single number. Agreeing on the method in advance matters more than agreeing on a figure.
What happens to equipment or property a partner contributes? Property contributed to a partnership generally carries over the contributing partner's existing tax basis rather than resetting to the agreed value. The gap between agreed value and tax basis has to be tracked, because it affects how future depreciation and any eventual gain are allocated between the partners.
About the author: Kimberly Green is the cofounder of Sam's List, where business owners and high earners find vetted CPAs, financial advisors, and fractional CFOs. She's met one-on-one with 400+ financial professionals and writes from the real data behind thousands of client-advisor matches. Ask her anything about finding an accountant - she's heard it all, including the questions people are afraid to ask.