Build The Freelancer Scope-Creep Cost Calculator, an interactive planning tool that reveals how small unplanned requests affect project profitability and delivery schedules.
Allow users to enter a project quote, estimated hours, hourly operating costs, revision limits, milestones, planned deliverables, and additional client requests.
The tool should:
Calculate the original effective hourly rate and expected margin.
Record extra tasks and estimate their time and cost.
Compare included revisions with requests outside the agreed scope.
Model the impact of accepting, postponing, or charging for each additional task.
Show changes to the delivery timeline and other project commitments.
Calculate a revised quote using configurable pricing rules.
Generate a professional change-request proposal.
Maintain a log of original scope, requested changes, approvals, and revised estimates.
Include realistic scenarios for a website project, a mobile app, and a monthly marketing retainer. Keep the calculations transparent, let users override estimates, and never assume that a client request is contractually chargeable without reviewing the actual agreement. Make the tool useful for solo freelancers and small agencies.
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