#
13-Week Cash Flow Forecast
A rolling, week-by-week projection of all expected cash inflows and outflows over the next 13 weeks (one quarter). It is the standard tool finance teams, fractional CFOs, and lenders use to manage short-term liquidity, anticipate cash shortfalls before they occur, and time large outflows like payroll, taxes, loan payments, and vendor invoices. Unlike annual budgets, the 13-week forecast updates weekly so it always reflects the most current reality.
A
Accounts Payable (AP)
The money a business owes to suppliers, vendors, and creditors for goods or services received but not yet paid. AP is recorded as a current liability on the balance sheet and is a key lever in working capital management — extending payment terms conserves cash, while paying early can earn early-payment discounts. Tracking AP aging helps avoid late fees and maintain vendor relationships.
Accounts Receivable (AR)
The money owed to a business by its customers for products delivered or services performed but not yet collected. AR appears as a current asset on the balance sheet. High AR balances relative to revenue often signal collection problems that can cause a cash crunch even for profitable businesses. Reducing AR through faster invoicing, payment terms enforcement, and automated follow-up is one of the fastest ways to improve cash flow.
Accrual Accounting
An accounting method that records revenue when it is earned and expenses when they are incurred, regardless of when cash actually changes hands. Required by GAAP, accrual accounting provides a more accurate picture of financial performance than cash basis but requires careful tracking of receivables, payables, and deferred items. Most lenders and acquirers require accrual-basis financials.
AR Aging Report
A report that categorizes outstanding customer invoices by how long they have been unpaid — typically bucketed into 0–30, 31–60, 61–90, and 90+ day columns. It is the primary tool for identifying at-risk receivables, measuring collection effectiveness, and prioritizing follow-up. A healthy AR aging report shows the vast majority of balances in the current 0–30 day bucket; a growing 90+ day balance is an early warning sign of bad debt.
B
Balance Sheet
A financial statement that shows a company's assets, liabilities, and shareholders' equity at a single point in time. The fundamental equation: Assets = Liabilities + Equity. The balance sheet answers the question "what does the business own and what does it owe?" and is one of the three core financial statements alongside the income statement and cash flow statement. Lenders and acquirers scrutinize balance sheets to assess financial health and leverage.
Bookkeeping
The systematic process of recording every financial transaction a business makes — including sales, expenses, payroll, and bank activity — in a structured ledger. Accurate bookkeeping is the foundation for all financial reporting, tax compliance, and strategic decision-making. Modern bookkeeping software like QuickBooks and Xero automates much of this work; Cash Flow Optimizer layers AI-powered automation on top to handle categorization, reconciliation, and reporting.
Break-Even Point
The level of revenue at which total costs (fixed plus variable) exactly equal total revenue, producing neither profit nor loss. Calculated as: Fixed Costs ÷ Gross Margin %. Knowing your break-even helps set minimum pricing, evaluate the cost of a new hire, model how much revenue is needed before adding overhead, and determine how much of a revenue decline the business can absorb.
Burn Rate
The rate at which a company is consuming its cash reserves, typically expressed as a monthly figure. Gross burn rate is total monthly cash outflow; net burn rate subtracts revenue to show the actual monthly cash consumed. Burn rate is especially critical for pre-revenue startups and growth-stage companies, as it directly determines cash runway and the timeline to the next fundraise or profitability milestone.
C
Capital Expenditure (CapEx)
Funds a business spends to acquire, upgrade, or maintain long-term physical or intangible assets — such as equipment, property, vehicles, or enterprise software — expected to generate value over multiple years. CapEx is capitalized on the balance sheet and depreciated over time, distinguishing it from operating expenses (OpEx) which are expensed immediately. High CapEx businesses require more capital to grow; asset-light businesses can scale with less.
Cash Basis Accounting
An accounting method that records revenue when cash is received and expenses when cash is paid, regardless of when the underlying transaction occurred. Simpler than accrual accounting, cash basis is common among small businesses and sole proprietors. However, it can obscure true profitability, is not permitted under GAAP for most businesses above a revenue threshold, and makes it difficult to get bank financing or pass due diligence.
Cash Flow
The actual movement of money into and out of a business's bank accounts during a given period. Positive cash flow means more money is coming in than going out; negative cash flow means the reverse. Critically, a profitable business can still have negative cash flow if customers pay slowly, inventory builds up, or growth requires heavy upfront investment — which is why cash flow forecasting is the most important discipline in business finance, and why "cash is king."
Cash Runway
The number of months a company can continue operating at its current spending rate before exhausting its available cash. Calculated as: Cash on Hand ÷ Monthly Net Burn Rate. For most established small businesses, a healthy cash runway is 3–6 months. Venture-backed startups typically target 18–24 months between funding rounds. When runway drops below 3 months, fundraising, cost cuts, or revenue acceleration become urgent.
COGS — Cost of Goods Sold
The direct costs attributable to producing the goods or services a company sells, including raw materials, direct labor, and direct overhead. COGS is subtracted from revenue to calculate gross profit. Understanding and controlling COGS is the most direct path to improving gross margin — the first and most important line of profitability analysis. For service businesses, direct labor is typically the largest COGS component.
Customer Acquisition Cost (CAC)
The total cost of acquiring a single new customer, calculated by dividing all sales and marketing expenses over a period by the number of new customers gained. CAC is most meaningful when compared to Customer Lifetime Value (LTV) — a healthy LTV:CAC ratio is typically 3:1 or better for sustainable growth. High CAC relative to LTV means the business is buying customers at a loss, which is unsustainable without a clear path to improving either metric.
D
Days Sales Outstanding (DSO)
A measure of the average number of days it takes a company to collect payment after a sale is made. Calculated as: (Accounts Receivable ÷ Total Revenue) × Days in Period. A lower DSO means faster collections and healthier cash flow. For most B2B service businesses, a DSO of 30–45 days is considered healthy; above 60 days is a warning sign. Improving DSO by even 10 days can meaningfully boost cash on hand in a growing business.
E
EBITDA
Earnings Before Interest, Taxes, Depreciation, and Amortization — a measure of a company's core operating profitability before the effects of financing decisions, tax strategy, and non-cash accounting items. EBITDA is the most widely used metric for business valuation: most lower-middle-market businesses sell at 3–6x EBITDA, SaaS businesses at 6–12x, and best-in-class companies higher. Buyers and lenders use EBITDA to compare companies across different capital structures.
F
Fractional CFO
An experienced Chief Financial Officer who provides strategic finance leadership to a company on a part-time or contract basis — typically 5 to 40 hours per month. Fractional CFO services deliver cash flow forecasting, financial modeling, board reporting, fundraising support, and KPI design at roughly 10–25% of a full-time CFO's cost. Common for businesses between $1M and $20M in revenue that need senior finance leadership but can't yet justify a full-time hire. Also called outsourced CFO, part-time CFO, or virtual CFO.
G
Gross Margin
The percentage of revenue remaining after subtracting the cost of goods sold. Calculated as: (Revenue − COGS) ÷ Revenue × 100. Gross margin is the most fundamental indicator of a business's pricing power and unit economics. Industry benchmarks: SaaS typically targets 70–85%, professional services 40–60%, manufacturers 20–40%, and contractors 25–45%. Improving gross margin by even a few percentage points flows almost entirely to operating income.
I
Income Statement (P&L)
A financial statement summarizing a company's revenues, costs, and expenses over a reporting period to calculate net profit or loss. Also called the Profit and Loss statement, it answers the question "did the business make money?" It flows from Revenue → Gross Profit → Operating Income → Net Income. It is one of the three core financial statements alongside the balance sheet and cash flow statement, and is the first report most operators look at in a monthly close.
L
Lifetime Value (LTV)
The total net revenue a business expects to generate from a single customer over the entire duration of their relationship. Calculated as: Average Revenue per Customer × Gross Margin % × Average Customer Lifespan. A healthy LTV:CAC ratio of 3:1 or higher indicates a sustainable, scalable customer acquisition model. LTV is the denominator that makes your CAC make sense — a $5,000 CAC is fine if LTV is $25,000, and ruinous if LTV is $6,000.
M
Monthly Recurring Revenue (MRR)
The predictable, contractually committed revenue a subscription or SaaS business expects to receive every month from its active customers. MRR is the most-watched top-line metric for subscription businesses because it represents the stable revenue base that can be forecasted with high confidence. Net MRR growth (new MRR + expansion MRR − churned MRR) is the primary growth metric. Churn rate — the % of MRR lost each month — is the primary health metric.
N
Net Working Capital
Current assets minus current liabilities — a snapshot of a company's short-term liquidity and its ability to meet near-term financial obligations. Positive net working capital means a business has more liquid assets than short-term debts. Negative working capital can signal liquidity risk, though some business models (like subscription SaaS with upfront payments) can operate sustainably with negative working capital. Working capital management involves optimizing the timing of AR collection, inventory purchases, and AP payments.
O
Operating Cash Flow
The cash generated by a company's core business operations, found on the cash flow statement. Calculated by adjusting net income for non-cash items (depreciation, amortization) and changes in working capital (AR, AP, inventory). Operating cash flow is considered the most reliable measure of a business's financial health because it reflects actual cash generation from the core business — not accounting adjustments, investment returns, or financing activity.
Operating Expenses (OpEx)
The ongoing costs required to run a business's day-to-day operations that are not directly tied to producing goods or services — including salaries and benefits, rent, utilities, marketing, software subscriptions, and insurance. OpEx appears below gross profit on the income statement. Controlling OpEx growth relative to revenue is critical to maintaining profitability at scale. A common mistake: growing OpEx ahead of the revenue that justifies it.
Q
Quality of Earnings (QoE)
A third-party financial analysis, typically commissioned during M&A due diligence, that validates a company's reported EBITDA, assesses revenue quality and sustainability, and identifies accounting practices or one-time items that inflate reported profitability. A clean sell-side QoE report (commissioned by the seller before going to market) often accelerates deal timelines, reduces buyer-side adjustments, and supports a higher purchase price by proactively addressing what buyers will find anyway.
R
Rule of 40
A benchmark for SaaS and high-growth companies stating that revenue growth rate % + EBITDA margin % should equal at least 40. A company growing at 30% with a 15% EBITDA margin scores 45 — above the threshold. The Rule of 40 helps investors and operators evaluate whether a business is making the right tradeoff between growth investment and profitability. Companies above 60 are considered best-in-class; below 20 warrants strategic review.
S
Seller's Discretionary Earnings (SDE)
The total financial benefit a single full-time owner-operator derives from a business in a year, calculated as net profit plus the owner's salary, benefits, personal perks run through the business, and one-time or non-recurring expenses added back. SDE is the standard valuation basis for small businesses — typically under $5M in revenue — and is usually valued at 2–4x SDE for most service businesses, depending on growth, customer concentration, and transferability.
U
Unit Economics
The direct revenues and costs associated with a single unit of business — one customer, one transaction, or one subscription — used to evaluate whether the core business model is profitable and scalable at the individual level. Strong unit economics (LTV:CAC > 3, positive contribution margin per customer) is a prerequisite for sustainable growth at scale. The most common mistake in growth-stage companies: scaling before unit economics are proven, which amplifies losses rather than profits.