Project Cost Estimator

Build a clear cost breakdown for client projects. Add your line items, set your margin, and get a number you can stand behind.

Description
Hours
Rate ($)
Total

Project Total

Labor subtotal $0
Contingency buffer (10%) $0
Profit margin (15%) $0
Quote to client $0
Total hours 0
Effective hourly rate $0

How to Estimate Project Costs (Without Losing Money)

Undercharging is the most common freelancer mistake. It usually comes from forgetting to account for the invisible work: revisions, communication, context switching, and the gap between estimated hours and actual hours.

Break it into phases

Don't quote a project as one big number. Break it into phases or deliverables: discovery, design, development, testing, revisions. Each phase gets its own estimate. This makes the scope visible to both you and the client.

The contingency buffer is not optional

Projects always take longer than expected. A 10-15% buffer accounts for scope creep, unexpected complexity, and the things you didn't know you didn't know. Experienced freelancers consider this standard practice, not padding.

Profit margin vs. hourly rate

Your hourly rate covers your time. The profit margin covers your business: the time you spent writing the proposal, the tools you maintain, the expertise you've built over years. It's separate from your rate, and clients who understand business expect it.

Round up, not down

When you're unsure about hours, round up. If you think something takes 8-12 hours, quote 12. Finishing early makes you look efficient. Blowing past your estimate makes you look unreliable. Under-promise and over-deliver.