How to Build a Working Capital Estimate Before an LOI

Working capital can quietly change the economics of a deal, which is why every founder should build a working capital estimate before an LOI is signed. In mergers and acquisitions, working capital usually refers to current operating assets minus current operating liabilities, adjusted to exclude cash, debt, and unusual items that do not transfer with the business. Buyers use it to make sure the company they acquire has enough day-to-day liquidity to operate normally at closing. Sellers often focus on headline valuation, but purchase price adjustments tied to working capital can move proceeds materially. A business sold for an attractive multiple can still disappoint the founder if the post-close true-up cuts the check by hundreds of thousands of dollars.

This matters because the LOI often sets the framework for the working capital target, even if the precise peg is finalized later in the purchase agreement. Once exclusivity begins, leverage narrows. If the seller has not already estimated normalized working capital, the buyer usually defines it first. In practice, that means founders can enter a negotiation believing they have a clean deal, only to learn later that aging receivables, inventory build, prepaid expenses, accrued bonuses, or deferred revenue create a downward adjustment. I have seen this happen repeatedly in lower middle-market deals. The pattern is consistent: owners know revenue, profit, and tax liability, but they have not translated monthly balance sheet movements into a working capital story a buyer can underwrite.

A solid working capital estimate does three things. First, it helps a founder understand what level of current assets and liabilities is truly required to run the business on a normal basis. Second, it creates a defensible negotiating position before an LOI is signed. Third, it reduces surprise during diligence and the closing true-up process. This article serves as the hub for valuation and financial tools within the broader tools, checklists, and resources category. It explains how to build a working capital estimate, what inputs matter, where founders make mistakes, and how this analysis connects to valuation, quality of earnings, and deal structure.

What Working Capital Means in an M&A Context

In operating terms, working capital is not just a textbook formula. In M&A, it is a negotiated estimate of the net current assets needed to deliver the business in a normal, go-forward condition. Buyers are not paying to inherit a cash crisis. They expect sufficient receivables, inventory, and other short-term operating assets to support ordinary activity, along with ordinary short-term liabilities such as payables and accrued expenses. Most deals exclude cash and interest-bearing debt because those items are handled separately in the purchase price mechanics.

That distinction matters. A founder might look at the company’s bank account and think liquidity is strong, but cash is usually not part of the working capital peg. Likewise, a line of credit may keep operations moving, but debt does not count as a substitute for normalized working capital. The buyer wants to know whether the operating engine, on a standalone basis, has enough fuel to continue without an immediate capital injection.

Different business models produce different working capital profiles. A distributor with significant inventory and customer receivables will have a very different working capital requirement than a software company with annual prepaid contracts and limited inventory. An agency with monthly retainers may have low receivables and high accrued payroll. A seasonal HVAC contractor may build receivables in one quarter and collect heavily in another. This is why working capital cannot be guessed from one month’s balance sheet. It must be estimated from a pattern.

The Core Components of a Working Capital Estimate

Before you can estimate normalized working capital, you need to identify which balance sheet accounts are truly operating in nature. Founders often start with a standard current assets minus current liabilities schedule, but that is only the first pass. The real work is deciding what belongs in the calculation and what should be excluded.

Operating current assets commonly include accounts receivable, inventory, unbilled revenue if it is legitimate and recurring, and certain prepaid expenses directly tied to operations. Operating current liabilities often include accounts payable, accrued payroll, accrued bonuses if recurring, accrued commissions, deferred revenue, and certain taxes payable. Exclusions typically include cash, marketable securities, shareholder loans, income tax receivables or liabilities tied to entity structure, and current portions of funded debt.

The reason these classifications matter is simple: buyers care about ongoing operations, not accounting noise. If a prepaid expense is a one-time insurance settlement or litigation cost, it may not belong. If accrued expenses spike once a year because of owner distributions booked through payroll, that may need adjustment. If inventory includes obsolete stock that has not moved in eighteen months, a buyer will challenge its inclusion at full value.

How to Calculate a Normalized Working Capital Target

The most reliable working capital estimate starts with monthly balance sheets for at least twelve months, and preferably twenty-four. More history is useful if the business is seasonal or has changed meaningfully in size. Pull each relevant working capital account by month-end and calculate net working capital for each month using only the accounts that belong in the operating definition.

Then look for the normal range. In many lower middle-market deals, the target is based on a trailing twelve-month average of monthly net working capital. That is common because it smooths short-term fluctuations. But average alone is not enough. You need to inspect outliers. If one month includes a deliberate collections push before year-end, another reflects a large inventory buy ahead of supply disruptions, and a third includes delayed vendor payments, a simple average may distort reality. The right answer is often a normalized average adjusted for unusual events.

Founders should also measure working capital in relation to revenue. Net working capital as a percentage of trailing revenue can help determine whether the business is becoming more or less efficient over time. Days sales outstanding, days inventory on hand, and days payable outstanding are also useful. If receivables days have been rising for six straight months, a buyer will likely question the quality of that asset. If payables days jumped only because the company stretched vendors, the buyer may argue the reported working capital is overstated.

In practical terms, build a monthly schedule showing each included account, monthly totals, the monthly net figure, and notes for anomalies. Then develop three views: raw average, adjusted average, and management’s recommended peg. This becomes the basis for your negotiation. The point is not to force the highest number. It is to produce a target that reflects how the business actually operates.

Adjusting for Seasonality, Growth, and One-Time Distortions

Founders get into trouble when they assume trailing averages are always fair. They are not. A retailer heading into holiday season may require far more inventory and payables support than a simple annual average implies. A construction business may swing sharply based on billing milestones. A software company closing many annual contracts in the fourth quarter may carry elevated deferred revenue, which lowers working capital even though the business is healthy.

Seasonality should be visible in the monthly schedule. If the business has a recurring annual cycle, the target should reflect that cycle rather than a random midpoint. One common method is to use the average of the months that match the expected closing period. For example, if closing is likely in June, then analyzing historical May, June, and July balances may be more informative than relying on the full-year average alone.

Growth creates another distortion. If revenue has doubled over the past year, the simple average of the last twelve months may understate the current working capital needed to operate the larger business. In that case, trend-weighted analysis or more recent monthly averages may be appropriate. Buyers know this and will usually resist a target that is detached from current scale.

One-time distortions must also be stripped out. These include extraordinary collections efforts timed around a deal, temporary payment freezes, nonrecurring inventory purchases, unusual tax payments, disaster-related disruptions, or accounting cleanup entries. The discipline here is to explain every meaningful variance with documentation. A buyer will accept adjustments supported by data much faster than adjustments supported by optimism.

Common Founder Mistakes Before an LOI

The first mistake is treating working capital as a legal issue to solve later. By the time the LOI is signed, the buyer usually has momentum and a framework in mind. If you do not enter the conversation with your own estimate, you are reacting. The second mistake is using year-end numbers without understanding that year-end often reflects tax planning, bonus accruals, inventory timing, or balance sheet cleanup that is not representative of normal operations.

The third mistake is ignoring aging. Accounts receivable are not all equal. A buyer looks at collectability, not just gross balances. Inventory is not all equal either. Obsolescence matters. The fourth mistake is overlooking liabilities that should be included, especially accrued compensation, customer deposits, or deferred revenue. Sellers tend to notice assets first because assets feel like value. Buyers notice liabilities because liabilities consume value.

The fifth mistake is failing to connect working capital to the broader valuation narrative. If the business is sold on the basis of strong growth and healthy customer retention, but the balance sheet shows deteriorating collections, stretched payables, and inconsistent accruals, the story breaks. That is why this topic belongs in a valuation and financial tools hub. Working capital is not isolated. It directly affects proceeds, credibility, and negotiating leverage.

How This Estimate Supports LOI Negotiation and Diligence

A working capital estimate gives you a sharper position before signing exclusivity. When the buyer proposes a peg, you can respond with a documented range and explain the assumptions behind it. That changes the conversation from opinion to evidence. It also helps frame whether the purchase price is truly what it appears to be. A headline offer of $12 million with a hidden $750,000 working capital burden is not the same as a clean $12 million deal.

During diligence, your estimate becomes a roadmap. It helps your CPA, quality of earnings provider, and M&A advisor answer questions quickly. If the buyer sees that management already understands normal working capital, it builds trust. If they discover that no one has looked at it carefully, they often dig harder and become more conservative. In my experience, preparation here shortens deal fatigue and reduces the chance of late-stage retrading.

This page is the hub for valuation and financial tools, so founders should think of working capital alongside adjacent tools: EBITDA normalization, quality of earnings preparation, trailing twelve-month analysis, revenue concentration review, and cash flow forecasting. Those tools work together. A proper working capital model informs each of them and should link conceptually to your internal financial reporting process.

What Founders Should Do Next

If you are within twelve to twenty-four months of a potential sale, start now. Pull twenty-four months of monthly balance sheets, define operating current assets and liabilities, calculate monthly net working capital, identify outliers, and document the reasons behind adjustments. Then review the schedule with your accountant and deal advisor. If you do not have those partners yet, this is the moment to find them. It is far easier to fix assumptions now than under exclusivity.

The practical benefit is immediate. You will understand your business better, negotiate more effectively, and avoid one of the most common deal surprises in lower middle-market M&A. More broadly, you will begin thinking like an exit-ready founder instead of a reactive seller. That is the larger advantage. A business with clean financial tools, documented assumptions, and disciplined preparation almost always performs better in market.

The key takeaway is simple: build the working capital estimate before the LOI, not after it. If you wait, the buyer defines the frame. If you prepare, you walk in with leverage, clarity, and a stronger chance of protecting the value you have spent years creating. Use this article as your hub for valuation and financial tools, then turn the analysis into action. Start the schedule, pressure-test the assumptions, and make your balance sheet part of your strategy today.

Frequently Asked Questions

What is a working capital estimate in an M&A deal, and why should founders build one before signing an LOI?

A working capital estimate is an early calculation of the amount of net operating liquidity a buyer will expect the business to deliver at closing. In most middle-market and lower middle-market transactions, working capital is generally defined as current operating assets minus current operating liabilities, with important adjustments to remove items like cash, debt, income taxes payable, shareholder-related balances, and other non-operating or non-recurring items that are not part of the normal transfer of the business. The reason this matters is simple: purchase price is rarely just the headline number. The buyer usually expects to receive a business with enough inventory, receivables, prepaid expenses, payables, and accrued expenses to keep operating in the ordinary course on day one after closing.

Founders should build this estimate before an LOI because working capital can materially change deal economics even when the stated enterprise value looks attractive. If a seller assumes the headline price is the amount they will receive, but the buyer later proposes a high working capital target, the seller may effectively have to leave more value in the business at closing than expected. That can feel like a hidden purchase price reduction. By preparing an estimate in advance, founders can understand how much operating capital the business normally requires, identify areas likely to trigger adjustment disputes, and negotiate from a position of clarity rather than reacting under pressure during exclusivity.

Just as important, a pre-LOI estimate helps align internal expectations. It allows the founder, CFO, advisors, and shareholders to distinguish between cash that can likely be distributed before closing and liquidity that must remain in the company to satisfy the working capital target. It also helps support more precise LOI language around target working capital, peg methodology, exclusions, seasonality, and whether the adjustment will be based on a trailing average, a monthly average, or a normalized range. In practical terms, building the estimate early reduces surprises, improves negotiating leverage, and helps preserve value through the later stages of diligence and purchase agreement drafting.

How is working capital typically defined for a deal, and what should be included or excluded in the estimate?

In an acquisition context, working capital is not always the same as the figure shown on a company’s balance sheet. Deal working capital is usually a negotiated concept designed to measure the liquid operating assets and liabilities that transfer with the business and support its normal ongoing operations. Typical included current assets may consist of accounts receivable, inventory, certain prepaid expenses, and other short-term operating assets. Typical included current liabilities may consist of accounts payable, accrued payroll, accrued bonuses if treated as operating, customer deposits, deferred revenue in some cases, and other short-term operating obligations tied to the business.

Several items are commonly excluded because they are not viewed as part of normalized operating working capital. Cash and cash equivalents are usually excluded because cash is often retained by the seller unless the deal is structured otherwise. Debt and debt-like items are also typically excluded because they are handled separately through debt payoffs or purchase price adjustments. Income tax assets and liabilities are often excluded, as are shareholder loans, intercompany balances that will be settled before closing, transaction expenses, one-time legal or consulting accruals, and unusual items that do not reflect ordinary course operations. Some deals also exclude current portions of capital leases, deferred financing costs, and non-operating receivables.

The key is that there is no single universal formula. The estimate needs to reflect how the business actually runs and how the buyer is likely to define “normalized” operations. For example, a software company may have little inventory but meaningful deferred revenue, while a distributor may have substantial inventory swings and vendor terms that heavily influence its working capital profile. A founder should therefore build a deal-specific schedule, not just rely on a textbook definition. The most useful approach is to start with the monthly balance sheet, identify each current account, classify whether it is operating or non-operating, and document the rationale for inclusion or exclusion. That documentation becomes especially valuable when diligence begins and the buyer’s quality of earnings team starts testing the peg.

How do founders actually calculate a reliable working capital target before an LOI?

The best way to calculate a reliable pre-LOI working capital target is to use a historical, monthly analysis rather than a single point-in-time balance sheet. Start by gathering at least the last 12 months of monthly balance sheets, and ideally 24 months if the business has seasonality or recent volatility. Recast those balance sheets into a deal-style working capital schedule by separating operating current assets and operating current liabilities from excluded items such as cash, debt, taxes, owner-related balances, and one-time expenses. Once that schedule is built, calculate monthly net working capital and look for patterns in how the business behaves over time.

From there, normalize the data. A simple average of the last 12 months can be a useful starting point, but it is not always the right answer. If the business is seasonal, a closing in the middle of a heavy inventory build or receivables collection cycle may require a month-specific or seasonally adjusted target. If recent months include unusual events, such as a temporary supply chain disruption, a large customer prepayment, delayed collections, or accelerated payables, those periods may need to be adjusted or at least clearly explained. The goal is to estimate the amount of working capital required to operate the business in the ordinary course at the expected closing date, not to mechanically average distorted numbers.

Founders should also test the estimate against operating metrics. Days sales outstanding, days inventory on hand, and days payable outstanding can reveal whether the balance sheet is showing normal patterns or temporary manipulation. For instance, if payables are stretched unusually high right before a potential sale process, the company may appear to have lower working capital needs than it really does, but that position may not be sustainable. Likewise, if receivables include aging issues or inventory contains obsolete stock, the estimate may overstate true operating value. A reliable target combines accounting analysis with real business judgment. In many cases, management and advisors will prepare a low case, base case, and high case so they can understand the likely range and negotiate the LOI more intelligently.

What are the most common mistakes sellers make when estimating working capital before a letter of intent?

One of the most common mistakes is assuming that working capital is a minor legal or accounting detail that can be sorted out later. In reality, it is often one of the biggest hidden value drivers in a transaction. Sellers frequently focus on enterprise value and overlook the fact that the final cash proceeds can be meaningfully lower if the business is required to deliver a larger-than-expected amount of working capital at closing. Waiting until the buyer’s diligence team defines the peg puts the seller in a reactive position and can lead to unnecessary concessions.

Another major mistake is using the wrong data set or the wrong methodology. Founders sometimes look only at the latest month-end balance sheet, which can be misleading if the company is seasonal or if month-end balances fluctuate significantly. Others rely on GAAP current assets minus current liabilities without making the deal-specific adjustments that buyers almost always make. This can result in including cash, tax items, related-party balances, or transaction expenses that will not actually count toward the target. Similarly, some sellers fail to identify accounting clean-up issues such as aged receivables, obsolete inventory, under-accrued expenses, or misclassified liabilities, all of which can surface later and reduce the effective value of the business.

A third mistake is not documenting the rationale for exclusions and normalizations. Buyers and their advisors will usually ask why certain items were removed, why certain months were adjusted, and why a particular averaging period was chosen. If management cannot explain the logic clearly, the buyer may default to a more conservative view. Finally, sellers often underestimate behavioral risks during the sale process itself. Running lean on inventory, delaying payables, accelerating collections, or changing billing practices may improve short-term cash, but it can also make normalized working capital look higher once the buyer adjusts for those tactics. The strongest approach is to analyze the business honestly, maintain ordinary course operations, and address likely negotiation points before exclusivity begins.

How can a founder use a working capital estimate to negotiate better LOI and purchase agreement terms?

A pre-LOI working capital estimate gives a founder something extremely valuable in negotiations: a fact-based view of what “normal” actually means for the business. Instead of accepting a vague statement that the deal will include a “normal level of working capital,” the seller can propose a more precise framework. That may include a specific peg amount, a formula based on a trailing monthly average, a seasonally adjusted methodology, or explicit inclusions and exclusions for sensitive accounts. The more clarity established early, the less room there is for the buyer to redefine the economics later in diligence or in the purchase agreement.

Founders can also use the estimate to identify which issues deserve LOI attention and which can wait. If the analysis shows that deferred revenue, customer deposits, accrued bonuses, inventory reserves, or prepaid expenses are likely to be controversial, those topics should be surfaced early. In some cases, the seller can negotiate that certain items be excluded from the working capital adjustment entirely, or that the peg be calculated using principles consistent with historical practice. In others, the seller may agree to a target but insist on guardrails, such as a sample calculation attached to the LO