Create forward-looking financial statements to guide decisions, secure funding, and value your business. Learn to build proforma income statements, balance sheets, and cash flow statements.

Creating proforma financial statements is your way of looking into the future. Instead of just reporting what happened, you're building a detailed forecast of what could happen, turning a set of well-reasoned assumptions into a powerful tool for making decisions. This guide will walk you through the process of building the three core proforma statements: the income statement, the balance sheet, and the statement of cash flows.
In short, proforma financial statements are forward-looking projections. While historical financial statements tell the story of your company's past performance, proformas map out a potential future. They are built on a specific set of assumptions about sales growth, costs, and other key business drivers. Accountants and finance professionals build these models to answer "what-if" questions and guide strategic planning.
They are not just an academic exercise. Proformas are practical documents used for several crucial functions:
A reliable forecast always begins with a solid historical foundation. Before you can project the future, you need a clear and accurate picture of the present and the immediate past. A messy starting point will only lead to a confusing and unreliable model. Start by collecting the following documents:
This is where the real analytical work begins. Your assumptions are the engine of your proforma model, driving all the projections. Every assumption you make should be documented, defensible, and based on the best information available. A wild guess will undermine the entire model's credibility.
Here are some of the most common assumptions you'll need to define:
For your model to be clear and trustworthy, create a dedicated tab or section in your spreadsheet where every single one of these assumptions is listed. Anyone reviewing your work should be able to see exactly what drives your forecast.
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The income statement is usually the first financial statement you will build. It flows from top to bottom, starting with revenue and ending with net income. Let’s walk through a simplified example.
Assumption: Base year revenue is $1,000,000. Our growth rate assumption is 15%.
Year 1 Projected Revenue = $1,000,000 * (1 + 0.15) = $1,150,000Year 1 Projected COGS = $1,150,000 * 0.60 = $690,000Gross Profit = Revenue - COGS = $1,150,000 - $690,000 = $460,000Year 1 Projected SG&A = $1,150,000 * 0.25 = $287,500EBITDA = Gross Profit - SG&A = $460,000 - $287,500 = $172,500EBIT = EBITDA - D&A = $172,500 - $30,000 = $142,500EBT = EBIT - Interest Expense = $142,500 - $12,000 = $130,500Income Tax Expense = EBT * 0.21 = $130,500 * 0.21 = $27,405Net Income = EBT - Income Tax Expense = $130,500 - $27,405 = $103,095The proforma balance sheet shows the financial position of the company at the end of the forecast period. It is built by taking a snapshot of the prior period's balance sheet and adjusting each account based on the results of the proforma income statement and your assumptions. Critically, it must always abide by the fundamental accounting equation: Assets = Liabilities + Equity.
AR = (Projected Revenue / 365) * DSO AssumptionInventory = (Projected COGS / 365) * Inventory Days AssumptionEnding PP&E = Beginning PP&E + Capital Expenditures - DepreciationAP = (Projected COGS / 365) * DPO AssumptionEnding Debt = Beginning Debt + New Debt Raised - Principal RepaymentsEnding Retained Earnings = Beginning Retained Earnings + Net Income - Dividends PaidThe statement of cash flows ties everything together. It links the accrual-based income statement to the balance sheet by explaining the change in the cash balance from the beginning to the end of the period. For a clean model, this statement should be used to calculate the ending cash balance, avoiding the less precise "plug" method on the balance sheet.
The sum of CFO, CFI, and CFF gives you the Net Change in Cash for the period. Add this to your beginning cash balance to get your ending cash balance. This ending cash figure should be the number you use on your proforma balance sheet. If everything is linked correctly, the balance sheet will now balance perfectly.
Tools like Microsoft Excel forecast sheets or dedicated financial modeling software can help automate some connections, but understanding the manual logic is essential for building a truly reliable and flexible model.
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Building proforma statements is far more than an exercise in spreadsheet mechanics; it's a process of thinking critically about your business from all angles. This financial model translates your strategic plans, market understanding, and operational assumptions into a clear, unified financial picture that informs a better path forward.
These models require combining operational projections with sound tax logic—from future tax rates to the precise depreciation on new assets. When complex tax questions arise in your planning, you need reliable answers quickly. This is where Feather AI becomes exceptionally helpful, providing instant, citation-backed intelligence to ensure your assumptions are grounded in current tax code, letting you model key decisions with confidence.
Written by Feather Team
Published on January 6, 2026