Recruiting | 11Min Read

Candidate Sourcing Metrics Redefining Recruitment Dynamics

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What Have We Covered?

Ever wondered why your recruitment process feels like a treasure hunt without a map? Imagine having a detailed treasure map with an X marking the spot. That's what candidate sourcing metrics do—they're your treasure map, guiding you straight to the best candidates.

Think of it like gardening. You want to grow the most beautiful flowers (top talent), but you need to know which seeds to plant and how to care for them. Metrics are your gardening guide, telling you which sources yield the best candidates and how long it takes for them to bloom, and helping you discover sourcing candidates more efficiently.

But are you planting the right seeds? Are you even checking your guide regularly? Because a guide doesn't help if it's gathering dust. So, let's dive into how candidate sourcing metrics are transforming recruitment dynamics and why you should be all over them. Ready to turn your recruitment garden into a blooming success?

Why do Candidate Sourcing Metrics Matter?

Candidate sourcing metrics are your recruitment compass, showing you what talent sourcing strategies are successful and which ones need improvement. They help you find the best sources for candidates, manage your budget wisely, and improve how you reach out to potential hires. For instance, if you get few responses, it might mean you need to change your message, and if one source is too expensive, you might need to shift your resources elsewhere.

Metrics such as the time it takes to find candidates can point out areas where you can be more efficient, and diversity ratios help you make sure your candidate pool is inclusive. By keeping track of these metrics, you can make quick adjustments, focus on what works best, and move from just filling positions to proactive talent acquisition. These metrics don’t just measure your progress—they help you make better, quicker hiring decisions.

Key Candidate Sourcing Metrics Every Recruiter Should Track

1. Rehire/Referral Rates

Rehire and referral rates are clear indicators of your company’s reputation. A high rate of rehires means that people liked their job and the chances they had, while a high rate of referrals shows that employees trust and enjoy working for you. Referred hires often perform better, adapt faster, and stay longer.

To make things better and keep track of these trends—if the rehire rate is low, it might mean there are problems like bad management or not enough career growth, and if the referral rate is low, it could mean employees are unhappy. Use these numbers to improve how people see your company and to hire better people.

i. Rehire Rate Formula

Rehire Rate (%) = ( Number of Rehired Employees / Total Employees Hired) × 100

ii. Referral Rate Formula

Referral Rate (%) = Number of Hires from Referrals / Total Employees Hired ) X 100

2. Candidate Pipeline Growth

Tracking the growth of your candidate pipeline shows how well your talent pool is expanding over time. It's not just about increasing numbers but making sure the candidates are qualified and fit your hiring needs. Regularly check how many profiles are added and divide them by skill set, experience, and where they came from to find any gaps. Work on keeping these candidates interested by staying in touch with them, like sending updates or checking in, so they stay ready and responsive. A growing and engaged pipeline means you're always ready for future hiring demands.

The Formula for Candidate Pipeline Growth

Pipeline Growth Rate (%) - (New Candidates Added - Candidates Removed) /starting Pipeline Size × 100

3. Sourcing Channel Efficiency

Sourcing channel efficiency helps you determine which platforms bring in the best talent with the least effort and cost. Monitor conversion rates to see which channels attract qualified candidates, not just volume. Compare cost per hire and include both ad spend and time invested. Evaluate the quality of hire to ensure channels deliver high-performing talent. Lastly, measure time-to-source to identify the fastest and most reliable platforms. This data helps you focus on channels that consistently deliver top talent efficiently.

Formula for Sourcing Channel Efficiency

Sourcing Channel Efficiency= (Qualified Hires)/ (Total Cost + Time Spent)

4. Passive vs Active Candidates

Passive candidates are not actively looking for jobs but might be interested if the right opportunity comes along. They offer new skills and viewpoints, which are great for innovation and diversity. On the other hand, active candidates are actively searching for jobs and can be hired faster, making them important for filling urgent positions.

Tracking the ratio of the number of passive versus active candidates helps you adjust your strategy. Relying too much on active candidates can limit your access to top talent while focusing too much on passive candidates can slow down the hiring process. Use this information to balance your approach—improve your reputation to attract passive talent and make your job ads better for active job seekers. The goal is to improve both the quality and speed of hiring.

Formula for Passive vs. Active Candidates Ratio

Passive Vs Active Ratio = Number of Active Candidates Sourced / Number of Passive Candidates Sourced

5. Response Rate

Response rate is the percentage of people you contact who respond to your message. It shows how well your messages are received. A high response rate means your communication is effective and interesting, while a low rate suggests you need to make changes, like personalising your messages or sending them at better times.
To improve your response rate, talk directly to the candidates, mention their background, and clearly explain the benefits you offer. Each response is important—it’s the first step towards building strong connections and making successful hires.

Formula to Calculate Response Rate

Response Rate (%)= ( Number of Responses / Number of Outreach Attempts) × 100

6. Time-to-Source

Time-to-Source measures the time it takes from starting a search to contacting a candidate for the first time. This shows how well your sourcing strategy works and how fast your process is. A quicker time to source often means you're using good methods or being proactive, while longer times might suggest areas to improve, such as better job descriptions or different sourcing platforms.

Keeping track of this helps you balance speed and quality, so you can find great candidates quickly without sacrificing how well they fit the job. It's an important tool to improve your strategy, use your resources wisely, and stay ahead in getting the best candidates.

Formula for Time-to-Source

The formula to calculate Time-to-Source is:

Time-to-Source = Total Time Taken to Source Candidates/ Number of Candidates Sourced

7. Employee Referral Rates from Sourced Hires

Employee Referral Image

Tracking employee referral rates from sourced hires shows how effectively your hires recommend your company to others. High referral rates suggest a strong company culture and successful onboarding, as these hires bring in candidates who fit well with your values and stay with the company longer.

To increase this number, offer attractive incentives and celebrate successful referrals to encourage more participation. This is a cost-effective way to build a loyal talent pool and shows that your team believes in your company. This metric clearly shows the potential of your internal network to improve the quality of hires and employee engagement.

Formula:

Employee Referral Rate from Sourced Hires = (Number of Referrals from Sourced Hires / Total Number of Sourced Hires) × 100

8. Candidates per Sourcing Channel

Tracking how many candidates each sourcing channel delivers is key to optimising recruitment efforts. It shows which platforms yield the most engaged and qualified candidates, helping you focus on high-impact channels. For example, if LinkedIn consistently produces top candidates, it’s worth doubling down there. Conversely, underperforming channels may need a fresh strategy or less investment.

This metric also shows trends, such as more activity on specialised job sites, helping you stay ahead in finding candidates. Use tools or tags in your hiring software to keep track of where you find people. Over time, this information helps improve your strategy, making sure you spend your resources where they are most effective, which increases efficiency and hiring quality.

Formula:

Candidates per Sourcing Channel = Number of Candidates from a Channel / Total Candidates Sourced × 100

9. Cost per Sourcing Channel

Cost per sourcing channel measures how much you’re spending on each platform to bring in candidates. It’s essential to identify inefficiencies—like a job board consuming 40% of your budget but delivering only 10% of hires. For example, if LinkedIn costs INR 15,000 for 10 qualified candidates (INR 1,500 per candidate), compare that to a niche platform costing INR 8,000 for two candidates (INR 4,000 each).

The key is balancing cost with conversion rates and quality of hire. Avoid focusing on the cheapest channels; prioritise those delivering the best results. Don’t overlook hidden costs like recruiter hours or premium features, as they can affect the true value of a channel. Tracking this metric ensures every penny works toward hiring success.

Formula for Cost per Sourcing Channel

Cost per Sourcing Channel = Total Cost of the Channel / Number of Qualified Candidates from the Channel

10. Sourcing Channel Effectiveness

Sourcing channel effectiveness measures how well each recruitment method—like job boards, social media, or referrals—converts candidates into quality hires. It's not just about the number of hires but finding out which methods bring in hires that fit well and perform well over time. For instance, a job board might bring many candidates, but reaching out on LinkedIn could result in better hires.

To track this, analyse hires per channel, retention rates, and long-term performance. This ensures you focus resources on channels that consistently deliver value, streamlining your recruitment efforts.

Formula for Sourcing Channel Effectiveness

Sourcing Channel Effectiveness (%) = (Number of Quality Hires from Channel ÷ Total Candidates from Channel) × 100

11. Quality of Hire (QoH)

Quality of Hire (QoH) measures how well new hires perform and contribute to the company over time. It’s a critical metric that reflects the long-term success of recruitment efforts.

To track it effectively:

  • Performance Reviews: Assess how new hires are rated by their managers.
  • Retention Rates: High retention signals a good hire; high turnover indicates a mismatch.
  • Milestone Achievement: Evaluate if new hires meet their targets or goals.
  • Cultural Fit: Monitor how well they align with the team and company culture.

QoH ensures recruitment isn’t just about filling roles—it’s about hiring talent that adds lasting value.

Formula for Quality of Hire (QoH)

A commonly used formula to calculate Quality of Hire (QoH) is:

Quality of Hire=(Performance Score) + (Retention Score) + (Cultural Fit Score) / 3

Performance Score: Measure based on the employee's performance ratings during appraisals (e.g., on a scale of 1–10).

Retention Score: Assign a score based on how long the employee has stayed compared to the desired retention period.

  • For example, if the goal is 12 months and the hire has stayed 6 months, the score could be 5/10.

Cultural Fit Score: The Manager's or team’s assessment of how well the hire aligns with company values and culture (e.g., on a scale of 1–10).

12. Diversity Metrics

Diversity metrics help ensure your sourcing efforts build an inclusive workforce. Track representation across demographics like gender, ethnicity, and age in your candidate pipeline. Look at how candidates move through the hiring stages to find any possible biases. Check the diversity ratios for each sourcing channel to see which ones bring in the most diverse candidates and compare how well diverse and non-diverse candidates do in the hiring process. These insights reveal gaps and help refine your strategy to attract and hire underrepresented talent, fostering a stronger, more innovative team.

Formula for Diversity Ratio per Sourcing Channel

Diversity Ratio = Diverse Candidates from a Channel / Total Candidates from the Same Channel

13. Candidate Pipeline Health

As an experienced recruiter, I understand the importance of maintaining a healthy candidate pipeline. Think of it as a garden where diversity and engagement are key.

Here’s what to focus on:

  • Volume and Variety: Ensure your pipeline has a sufficient and diverse mix of candidates to fill both current and future roles. It's not about collecting resumes but strategically aligning potential hires with your needs.
  • Engagement Levels: Active engagement with candidates is crucial. Regular interactions keep them interested and informed, preventing disinterest and dropout.
  • Progression Rates: Monitor how candidates move through your recruitment process. Stagnation indicates potential issues, either with your procedures or the candidates themselves.
  • Conversion Rates: A healthy pipeline is validated by its conversion rates. Low conversions might signal the need to revisit your initial candidate assessments or your overall recruitment strategy.

Regularly reviewing these aspects ensures your pipeline remains robust, reducing time-to-hire and enhancing the quality of hires. It's like gardening: nurture your candidates well to reap the benefits of a flourishing pipeline.

Formula for Pipeline Health Score

Pipeline Health Score = Engaged Candidates in Pipeline​ / Total Candidates in Pipeline× 100

Conclusion

Candidate sourcing metrics are transforming recruitment by providing data-driven insights that help identify the best talent efficiently. These metrics offer a clear view of the recruitment funnel, from initial contact to final offer, allowing recruiters to pinpoint bottlenecks and optimise strategies. By tracking key indicators like conversion rates and time-to-fill, companies can streamline their hiring process and save resources.

In addition, measuring the quality of hire through performance and retention rates enables businesses to assess the long-term impact of their hiring decisions. This feedback helps refine sourcing strategies, ensuring future hires align well with both the role and company culture.

Basically, candidate sourcing metrics improve the recruitment process, resulting in better teams, lower turnover, and overall business success. This data-driven method helps both employers and candidates, making hiring more effective and meaningful.

About the Author

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Amit Ghodasara is the CEO of iSmartRecruit, leading the charge in HR technology. With years of experience in recruitment, he focuses on developing solutions that optimize the hiring process. Amit is passionate about empowering recruiters to achieve success with innovative, user-friendly software.

You can find Amit Ghodasara's on here.

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