Owen Castellanos wrote his first business plan over six weeks. Forty-seven pages, a competitive analysis matrix, a five-year revenue projection broken out by quarter. "I never used it," he writes. "Not once, in the three years I ran that business, did I open the file." That is the problem this book solves. Most business plans get written once to satisfy a bank, a course, or the founder's own anxiety, and then never opened again. This one is built to be read on a Tuesday morning when you are tired and need to decide what to do next.

Drawing on eleven years helping founders write working business plans, Castellanos strips the standard template down to five sections that earn their place: who you serve and what you sell, how the business makes money, how customers find you, how the work gets done, and the next ninety days. No competitive-analysis section, no market-size estimate, no five-year projection, no executive summary, no exit strategy. The result is an operational, plain-language business plan between eight and fifteen pages that you revise as reality teaches you, not a persuasion document for an audience that does not exist. Each chapter ends with a small writing exercise, so by the last page you have drafted a real plan for your own business.

Inside this business planning book for founders:

• Five sections that earn their place — Why the working business plan drops the competitive analysis, market-size estimate, and five-year forecast, and what to write instead
• Specificity that tells you what to do Monday — How "independent dental practices with two to four chairs" beats "small businesses," with offer descriptions that state price, format, scope, and what the customer receives
• The next ninety days, made operational — Three goals, four to six projects with owners and dates, a constraints list, and a "not doing" list that stops decisions from re-opening every week
• A plan that survives contact with reality — Dedicated chapters for losing a big customer and half your revenue, a competitor copying your offer, a channel that stops working, and an acquisition offer you did not expect
• The three-sentence preamble — What the business is, who it serves, and what stage you are at, anchored in customer count and revenue, so two minutes of reading re-orients you
• The plan when you are pre-revenue and in year two — How the document changes before your first customer and after the first eighteen months
• Templates and samples you can copy — Three sample working plans, a one-page plan template, a founder FAQ, and a year in the life of a plan

The honest truth Castellanos tells founders: writing the plan is the first twenty percent of the value, and reviewing it is the other eighty. "Founders who write good plans and never review them get roughly the same outcomes as founders who never plan." This business plan book hands you the loop that compounds: plan, do, review, adjust, plan again. It is a repair manual for a business being run by reaction, and a shortcut past the forty-seven-page version for anyone starting their first.

For readers of Gino Wickman's Traction and Mike Michalowicz's Profit First.