Estimate
A non-binding approximation of what a project will cost, given to a client before work begins.
Definition
An estimate is your best-effort approximation of what a job will cost, prepared before the work starts and before all the variables are known. It typically lists the anticipated scope, the expected hours or materials, and a projected total—often expressed as a range or with explicit caveats—so the client can decide whether to proceed.
The key distinction is that an estimate is non-binding: it signals "expect roughly this," not "I will charge exactly this." That separates it from a quote, which is generally a fixed offer you're committing to honor for a stated period. In practice the flow runs estimate, then quote or contract once scope firms up, then invoice once work is delivered. Many invoicing tools let you convert an accepted estimate directly into an invoice, carrying the line items over so nothing gets retyped.
Why It Matters
Estimates let you respond to opportunities fast without locking yourself into a price you'll regret. When a client asks "what would this roughly cost?" on day one, an estimate keeps the conversation moving while protecting you—if the scope doubles during discovery, an estimate flexes where a quoted fixed price would have you eating the difference.
The caveat is that clients tend to remember the number, not the disclaimer. Protect yourself by stating in writing that it's an estimate and not a fixed price, anchoring it to specific assumptions ("based on 5 pages and 2 revision rounds"), and committing to flag any overage before you incur it. An estimate that lands within about 10-15% of the final invoice builds trust; one that doubles without warning loses the client—so pad realistically rather than quoting low to win the job.
Examples
- 1
A web designer estimates a site rebuild at $6,000-$7,500 based on a 5-page scope, noting that e-commerce features would be estimated separately.
- 2
A contractor gives a $2,800 estimate for a deck repair, then calls the client when hidden rot is found and gets approval before the total rises to $3,400.
- 3
A copywriter sends a $1,500 estimate for a brochure; once the client confirms the final page count, she converts it to a fixed quote and then an invoice in her software.
Related Calculators
Apply this concept with our free calculators
Related Terms
Quick Navigation
Ready to put this into practice?
InvoiceLaunch automates invoicing with built-in payment terms, late fees, and more.
Get Started