Budgeting and Planning: Turning the Plan into Trackable Numbers

The difference between a budget and a financial model: the model explores scenarios and is used in funding conversations; the budget is an operational commitment to what you will spend and expect to earn, against which performance is measured.

1. Start from goals, not numbers

The correct sequence:

1. What is the goal for this period? One or two achievements, not five — reaching a revenue level, proving an acquisition channel, or launching a product.
2. What does achieving it require? People, tools, marketing spend, development.
3. What does that cost? Only here do the numbers appear.
4. Is that consistent with runway? If not, return to step one and reduce ambition — don't shrink the estimates to fit the desire.

Step four is the one usually skipped, producing an attractive budget that consumes the runway before reaching the goal.

2. Budget structure

• Revenue: by line, segment, or channel, tied to the revenue engine in the model.
• Variable costs: linked to activity volume rather than a fixed figure.
• Salaries: from a hiring plan with defined dates and fully loaded cost.
• Marketing: tied to an acquisition target and an assumed acquisition cost, not an arbitrary percentage.
• Operating and administrative: rent, tools, subscriptions, professional fees, statutory obligations.
• A contingency line: a margin for surprises. A budget without contingency is breached by month three.

3. Spending controls

A budget without controls is just a forecast. Three elements suffice:

• An owner for every line: a named person accountable for adherence.
• Approval limits: what is spent directly, what needs one approval, and what needs two.
• Separation of approval from execution: even if that separation is between two founders.

4. Variance analysis

Monthly, with three questions for every material variance:

• How large is it? In value and percentage.
• What caused it? Timing (merely delayed), price, volume, or a wrong assumption from the outset?
• What action follows? Correct, amend the budget, or accept the variance knowingly?

Distinguishing timing variance from substantive variance is the key to useful analysis. A deal delayed by a month is not a deal lost.

5. Reforecasting

A rigid annual budget doesn't suit a company whose assumptions change quarterly. The better practice:

• An annual budget as the overall frame.
• Quarterly reforecast of the remainder of the year based on actuals.
• A rolling 13-week cash forecast updated weekly.

This preserves discipline without clinging to a plan that reality has overtaken.

6. Linking the budget to metrics

Every significant spending line should be tied to a metric measuring its effect: marketing to acquisition cost and new customers, product hiring to launch velocity or a usage metric, operating spend to efficiency.

A line not tied to a metric is hard to defend — and usually hard to justify at all.

Common mistakes

• A budget prepared once and forgotten.
• Building from numbers rather than from goals.
• Ignoring runway when approving spend.
• No contingency line.
• Salaries estimated in aggregate with no hiring plan.
• Failing to distinguish timing from substantive variance.
• Amending the budget continuously until it loses value as a reference.

Checklist

• Period goals defined before the numbers
• Budget tied to the revenue engine and hiring plan
• Budget consistent with runway
• Contingency line included
• A named owner per line and approval limits
• Monthly variance review using the three questions
• Quarterly reforecast
• Significant spending lines tied to metrics

FAQ

Should I budget at very early stage?
Yes, even in simplified form. The purpose is controlling spend against runway, not institutional formality.

How often should I amend the budget?
Reforecast quarterly, and retain the original budget as a reference for comparison.

Which line most often escapes control?
Salaries and subscriptions — the first for its size, the second for its silent accumulation.