Metrics Guide

Every metric, fully explained

No black boxes. Every formula, every input, every assumption — documented with worked examples from a real deal, and free calculators where they help.

SDE (Seller's Discretionary Earnings)

Net Income + Owner Comp + Interest + D&A + Non-recurring

SDE represents the total economic benefit available to a single owner-operator. It is the most commonly used earnings metric for small business acquisitions (typically under $5M in revenue). SDE adds back the current owner's compensation and benefits because the buyer will replace them.

Free calculator included

EBITDA

Operating Income + Depreciation + Amortization

EBITDA measures operating profitability before the effects of capital structure, tax environment, and non-cash accounting charges. It is the standard earnings metric for mid-market transactions.

Adjusted EBITDA

EBITDA + Add-backs − Subtractions

Adjusted EBITDA normalizes EBITDA by removing one-time, non-recurring, or non-operating items. Common adjustments include owner perquisites, one-time legal costs, above/below-market rent, and related-party transactions.

CFADS (Cash Flow Available for Debt Service)

Adj EBITDA − Taxes − Maintenance CapEx − Change in NWC − Owner Salary

CFADS approximates the cash flow available to service acquisition debt after essential expenses. It deducts a reasonable owner salary replacement, estimated taxes, maintenance capital expenditures, and working capital changes from Adjusted EBITDA.

DSCR (Debt Service Coverage Ratio)

CFADS / Annual Debt Service

DSCR measures how many times annual cash flow can cover the annual loan payments (principal + interest). A DSCR of 1.25x means cash flow is 25% more than the required debt payments.

Free calculator included

Net Working Capital (NWC)

Current Assets − Current Liabilities

NWC measures the short-term liquidity of the business. It represents the difference between what the business owns in the near term and what it owes in the near term.

Gross Margin

(Revenue − COGS) / Revenue

Gross margin measures the percentage of revenue remaining after direct costs. It indicates pricing power and production efficiency.

UFCF (Unlevered Free Cash Flow)

Adj EBITDA − Taxes − Maintenance CapEx − Change in NWC

UFCF represents cash flow before debt service obligations. It is used for DCF (Discounted Cash Flow) analysis and represents the cash flow available to all capital providers.

AR Days, Inventory Days & AP Days

AR: (AR / Revenue) × 365 · Inv: (Inv / COGS) × 365 · AP: (AP / COGS) × 365

These working capital cycle metrics measure how quickly the business collects receivables, turns inventory, and pays suppliers.

BuySideMetrics is a decision-support and modeling tool. These metric definitions are for educational purposes. Not a CPA audit, review, or assurance engagement. Not tax or legal advice.