TL;DR

Source of hire tracks which recruitment channels produced the candidates who were actually hired. It tells you where your successful hires come from, not just where you attract applicants, making it the primary metric for evaluating recruiting channel ROI.

Where Your Hires Actually Come From

Source of hire answers the question that application volume cannot: which channels are producing people who get hired, not just people who apply? A job board that sends 500 applicants and produces two hires is not performing better than an employee referral program that sends 30 applicants and produces ten hires. Source of hire makes that visible.

The metric is tracked per hire. When a candidate is offered and accepts a position, the source is recorded. Over time, this data produces a distribution across channels: what percentage of hires came from referrals, direct applicants, LinkedIn, job boards, agency submissions, talent communities, campus programs, and so on.

Attribution is the hard part. Candidates routinely interact with multiple touchpoints before applying. Someone might see a LinkedIn post, visit the careers page, ignore it, see a referral mention from a colleague, and then apply directly. Which source gets credit? First touch, last touch, and multi-touch attribution models all produce different numbers. Most organizations default to last touch because it's the easiest to track, but this systematically undervalues brand awareness and top-of-funnel channels.

Why It Matters for Recruitment

Source of hire is how you decide where to spend the recruiting budget next quarter. Without it, channel investment is based on intuition and habit. With it, you can reallocate spend from high-volume, low-conversion channels to lower-volume, high-conversion ones.

For cost-per-hire analysis, source of hire provides the denominator. A LinkedIn Recruiter license costs roughly the same regardless of how many hires it produces. Knowing how many hires it produced in the past 12 months tells you the cost per hire from that channel and whether it compares favorably to alternatives.

For talent teams advising hiring managers on time-to-fill expectations, source of hire data provides evidence. "Our last six hires for this role type came through referrals with a 28-day average time-to-fill. If we're relying on job boards this time, plan for 45 days." That's a more credible briefing than a general estimate.

For staffing agencies, source of hire tracking separates productive sourcing methods from habitual ones. Agencies that know their placements come primarily from passive outreach on LinkedIn rather than inbound job board applications can justify investing in InMail credits over job postings.

In Practice

A mid-sized technology company with a 60-person talent team ran a source-of-hire analysis across 240 hires made in a 12-month period. Results: 38% from LinkedIn, 22% from referrals, 17% from direct applications, 12% from agencies, 7% from job boards, 4% from other.

The referral channel produced 22% of hires at a cost of roughly $1,200 per hire (program management and bonuses). LinkedIn produced 38% at a cost of $6,800 per hire (licenses, InMail). Job boards produced 7% at a cost of $4,100 per hire.

The analysis showed the referral program was returning more than five times the hire efficiency per dollar spent. The company doubled the referral bonus, reduced job board subscriptions to one, and reallocated the savings to LinkedIn for hard-to-fill senior roles. Twelve months later, referrals accounted for 31% of hires.

Key Facts