How many qualified enquiries would cover the investment?

1. Contribution per win = average sale revenue × gross contribution margin.
2. Expected contribution per qualified enquiry = contribution per win × qualified-enquiry close rate.
3. Expected break-even enquiries = monthly investment ÷ expected contribution per qualified enquiry.

Use percentages as fractions: 30% = 0.30. The displayed enquiry threshold rounds up, because a fractional enquiry is not a whole additional opportunity to close. A positive investment with zero margin or zero close rate has no finite threshold. Zero investment needs zero incremental enquiries.

Suppose you enter PHP 30,000 monthly investment, PHP 100,000 revenue per project, 30% gross contribution margin and a 20% qualified-enquiry close rate.

PHP 100,000 × 0.30 = PHP 30,000 contribution per win. PHP 30,000 × 0.20 = PHP 6,000 expected contribution per qualified enquiry. PHP 30,000 ÷ PHP 6,000 = five incremental qualified enquiries.

At PHP 31,000 investment with the other assumptions unchanged, the expected threshold is approximately 5.17 enquiries, rounded up to six. Neither calculation promises a win from five or six particular enquiries.

Method: arithmetic from user-entered assumptions. No keyword-volume, ranking, client outcome or lead forecast is built into the result.

Subtract direct delivery costs, including subcontracted production, before estimating your gross contribution margin. Consider whether founder review time, overhead, rework and sales effort also affect the decision; this calculator does not independently value those costs.

Close rate should concern qualified business enquiries, not all visits, form spam or job applications. If you do not know it, compare plausible assumptions and collect evidence before treating one result as a budget commitment.

The arithmetic does not predict rankings, lead volume, sales timing, payment collection or recurring lifetime value. A monthly investment may support sales that close later. Covering expected contribution is different from having enough cash in the month you pay.

If the implied threshold is commercially implausible, investigate the offer, margin, buying cycle or alternative acquisition route before increasing SEO spend. If it is plausible, you still need evidence of reachable buyer demand, suitable pages and a functioning enquiry process.

Compare what published SEO offers include, then use the provider-selection guide to compare responsibility and evidence. Strata quotes after diagnosing the problem; the hypothetical example does not establish a Strata fee.