Why
A budget disconnected from the forecast is a negotiation outcome, not a management tool. Quarterly adjustment keeps budgets relevant — annual-only budgets become stale by Q2 and are ignored entirely by Q3. The gap between forecast and budget is a signal that triggers action: adjust the budget or adjust the plan.
What
Create a consolidated cloud budget report at org and BU level. The budget is set from the forecast with a confidence-based buffer, broken down by business unit, and adjusted quarterly.
How
Set the Budget from the Forecast
Start with the forecast base estimate. Apply a buffer based on confidence profile:
| Forecast Confidence | Buffer | When to Use |
|---|---|---|
| Mostly High | 0–5% | Steady-state quarter |
| Mix of High/Medium | 5–10% | Some unknowns. Most common. |
| Significant Low | 15–20% | Greenfield launches, re-architecture |
Break the total to BU level. If “Shared/Unallocated” exceeds 10% of total, your cost allocation needs work.
Establish Budget Governance
| Cadence | What Happens |
|---|---|
| Annually | Set annual cloud budget by quarter and BU. Define thresholds. |
| Quarterly | Review and adjust based on reforecast and updated demand |
| Monthly | Variance report. Trigger escalations if thresholds exceeded |
Define When to Revise the Budget
A one-month spike is a variance explanation. Two consecutive months of 10%+ overrun is a budget revision. A major unplanned initiative approved mid-quarter gets its own budget amendment immediately.
Deliverable Checklist
- Budget set from forecast with confidence buffer
- Budget broken down by BU (not just org-wide)
- Quarterly adjustment process defined
- Budget governance cadence established (annual → quarterly → monthly)
- Revision triggers documented