A controller is the person who makes sure a company's numbers are accurate, on time, and legal. You run the accounting team, close the books each month, produce financial statements (GAAP in the US), set internal controls so money can't go missing, and explain the results to leaders. Most controllers start as staff accountants, move up through senior accountant and accounting manager, and reach controller after roughly 8-12 years. A bachelor's degree in accounting or finance is the usual requirement, and the CPA license is the strongest credential, though no law requires it for the title. This
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Stage 1 of 4 · about 12 weeks
Understand how double-entry accounting works (debits and credits, the accounting equation Assets = Liabilities + Equity) and how the three statements (income statement, balance sheet, cash flow statement) connect. Build fluent Excel basics: SUM, IF, XLOOKUP, pivot tables. Practice by recording 30 sample transactions for a fictional small business and producing a trial balance that balances.
Double-entry accounting and the accounting equation
Every number a controller signs off on comes from journal entries. If you understand why each entry has equal debits and credits, you can find errors, explain results and trust the books.
The three financial statements and how they connect
Controllers are judged on producing and explaining financial statements. When you see how the three tie together, you can spot why profit and cash are different, which is a question you will answer constantly.
Excel fundamentals for accounting
Excel is the controller's daily tool, listed first in the O*NET software for this job. Clean, formula-driven workbooks save hours and prevent mistakes.
Then 3 more stages (about 132 weeks in all) with lessons, drills, projects, 10 interview questions with strong answers and free resources.