Turn a base project estimate into a safer delivery allowance for fractional executive work. This calculator adds separate reserves for uncertainty, stakeholder revisions, and deadline compression, so the final number shows both planned work and contingency. It is useful before quoting a fixed-fee engagement, reserving calendar time, or deciding whether a project fits alongside recurring clients.
The allowances are added to the same base estimate, making each reserve visible and preventing compounding from obscuring the plan.
The buffered total is the calendar and pricing allowance to plan against. It does not mean every reserve hour must be billed; unused contingency protects delivery margin.
If a risk is already included in the base estimate, do not add it again. Extremely uncertain work may be better scoped as a paid discovery phase.
An 80-hour estimate with 15% uncertainty, 10% revisions, and 5% deadline compression adds 24 reserve hours, producing 104 buffered hours. At $250 per hour, the reserve represents $6,000 of delivery value.
No. Each percentage is applied to the base estimate and the resulting reserve hours are added together.
No. Known tasks belong in base hours; uncertainty is for work that cannot yet be specified confidently.
Yes. Multiply buffered hours by an appropriate rate, then adjust for value, expenses, and contract terms as needed.
The calculator allows it because highly uncertain work can require a reserve larger than the base estimate, but that may signal a need for discovery.
Not necessarily. It is delivery protection and may be consumed if the identified risks occur.
| Variable | Meaning |
|---|---|
| Base hours | Work that can be described and estimated now. |
| Uncertainty | Allowance for incomplete information or unclear scope. |
| Revisions | Time reserved for stakeholder feedback and rework. |
| Compression | Coordination cost created by an accelerated deadline. |