Creating a financial plan: from an idea to reliable monthly numbers
Build a financial plan from startup costs, monthly revenue and expenses, liquidity, funding needs, and documented assumptions.

Quick answer
Build a financial plan from startup costs, monthly revenue and expenses, liquidity, funding needs, and documented assumptions.
Key takeaways
- A useful financial plan answers several connected questions: how much capital is required, when recurring revenue covers recurring cost, and whether enough cash remains available until then.
- Separate fixed costs, variable costs, one-off investments, financing, and private funding needs.
- Use a base case and a cautious case, document every important assumption, and replace planned values with actual values after launch.
Build a financial plan from connected monthly assumptions
A useful financial plan answers several connected questions: how much capital is required, when recurring revenue covers recurring cost, and whether enough cash remains available until then. Start with realistic monthly sales volumes and prices rather than working backwards from a desired profit.
Separate fixed costs, variable costs, one-off investments, financing, and private funding needs. Then prepare both a profitability forecast and a liquidity plan. Profitability shows whether the business model can earn more than it consumes; liquidity shows whether bills can be paid at each point in time.
Use a base case and a cautious case, document every important assumption, and replace planned values with actual values after launch. The value of the plan is not that it predicts the future perfectly. It makes deviations visible early enough to act.
Sources and further information
Related workflows in accuno
These product pages show how accuno supports the workflows described in this guide.
Sources and further information
Editorial note
Prepared by the accuno Editorial Team and reviewed against the listed primary sources and the implemented product scope.
These articles provide general guidance and do not replace legal, tax, or business advice. Confirm your specific situation with a qualified professional.