PKI is everywhere. Do you know what it’s costing you?
Every enterprise runs on PKI. Certificates secure your websites, authenticate your devices, protect your workloads, and enable zero trust. But while PKI has become foundational infrastructure, most organizations have never scrutinized what it actually costs to operate.
That is a problem, because the real cost of PKI is almost always higher than anyone expects.
Between aging on-premises infrastructure, manual certificate workflows, and a workforce stretched thin by repetitive operational tasks, organizations are spending far more on PKI than they realize. Moreover, with certificate volumes growing and TLS certificate lifespans shrinking, those costs are only accelerating.
This post breaks down where PKI costs actually come from, what the data says about modernization ROI, and how to build a business case your leadership team will take seriously.
Where the real costs of PKI hide
Your PKI spending is like an iceberg. The visible costs (software licenses, hardware refreshes, headcount) are just the tip. Below the waterline sits a much larger mass of labor inefficiency, certificate overspending, and operational drag that rarely shows up in a single budget line.
Infrastructure
Running PKI on-premises means maintaining certificate authority (CA) servers, hardware security modules (HSMs), and the licensing that ties it all together. For a typical large enterprise, that baseline runs roughly $300,000 per year in hardware and licensing alone.
Then there is the staffing. Dedicated PKI engineers (an average of two per organization, at approximately $187,000 each) plus an additional 1.5 IT FTEs supporting PKI-related tasks at roughly $165,000 each bring the total infrastructure baseline to approximately $921,000 per year. One telecom organization reported managing 80 to 100 CA servers across its environment, illustrating how quickly infrastructure sprawls as certificate volumes grow.
These are not unusual numbers. They are the cost of doing business with legacy PKI.
Labor
Infrastructure costs are at least predictable. Labor costs are where organizations consistently underestimate their PKI spending.
Consider the time it takes to manage certificates manually. Provisioning a single certificate takes an average of 90 minutes. Renewing one takes 25 minutes. Deploying it takes 70 minutes. At a blended rate of $75 per hour, those minutes add up fast across thousands of certificates.
Automated workflows cut those times dramatically: provisioning drops to 2 minutes, renewal to 1 minute, and deployment to 15 minutes. Over a three-year period, the present value of labor savings is significant: $1.5 million in provisioning, $4.3 million in renewals, and $1.7 million in deployment.
As one SVP at a major banking institution put it: “We don’t get any business value having our engineers focus on the manual deployment and management of certificates across our environment.”
That is $7.5 million in combined labor costs that organizations are absorbing simply because manual processes have been the default. Read more in Post 3: Certificate lifecycle automation: how to manage certificates at enterprise scale
The public certificate premium
There is another cost that rarely gets the scrutiny it deserves: certificate type selection. Many organizations default to purchasing expensive public certificates for use cases where a private certificate would work just as well.
One enterprise leader explained: “We had a lot of interfaces that use public certificates that could utilize our trusted routes internally, and then we can issue them at a much cheaper cost.”
Another framed the opportunity more directly: “If I can take 30% of what we purchase in public today and move them to private certificates, we could save a ton of money.”
The exact savings will vary by organization based on certificate mix, volume, and existing infrastructure. But for enterprises managing hundreds of thousands of certificates, shifting even a portion of public certificates to private issuance represents a meaningful and recurring cost reduction.
Quantifying the ROI of PKI modernization
Understanding where costs hide is step one. Step two is knowing what a better approach looks like in hard numbers.
An independent Forrester Total Economic Impact study examined the financial outcomes of organizations that modernized their PKI using solutions that automate common workflows, consolidate infrastructure and improve certificate visibility and governance. The findings make a compelling case.
The composite organization
For the study, Forrester assumed a composite organization modeled around the interviews conducted. The model includes some assumptions about the composite organization, such as:
- It has around 40K employees,
- It relies on 400K certificates,
- It deploys and manages certificates with legacy infrastructure.
356% ROI with payback in under six months
The study found that a composite organization ($20 billion in revenue, 40,000 employees, 400,000 certificates under management) achieved a risk-adjusted ROI of 356% just three years post-modernization, with a payback period of less than six months. Concretely, the total benefits reached $12.7 million in present value against a total cost of $2.8 million, delivering a net present value of $9.9 million over three years.
Those are not theoretical projections. They are risk-adjusted figures based on actual outcomes. Read more in Post 4: PKI modernization in months, not years: a practical guide to fast deployment
Where the savings come from
The $12.7 million in benefits breaks down across six categories, each reflecting a different dimension of PKI cost reduction:
- Infrastructure consolidation: $1.4 million (replacing legacy on-premises PKI with cloud-delivered services)
- Certificate renewals: $4.3 million (automating the highest-volume, most time-intensive workflow)
- Certificate provisioning: $1.5 million (cutting provisioning time by over 95%)
- Certificate deployment: $1.7 million (reducing deployment from 70 minutes to 15)
- Incident reduction: $3.6 million (fewer certificate-related outages and faster resolution) Read more in Post 2: Certificate outages are preventable: how to reduce PKI risk and eliminate downtime
- Security posture improvement: $102,000 (stronger crypto-agility and compliance readiness)
The largest savings category, certificate renewals, reflects the sheer volume of renewal events across an enterprise certificate estate and the dramatic time reduction automation delivers.
What the investment looks like
Modernization is not free, but the investment is modest relative to the returns. The Forrester study documented the following costs for the composite organization:
- Annual SaaS platform fees: $485,000
- Professional services (implementation): $53,500
- Internal staffing (2.5 FTEs at $156,000 average): ongoing operational support
The total cost in present value over three years came to $2.8 million, yielding the 356% return outlined above.
The cost of doing nothing is going up
Even if your current PKI costs feel manageable today, two trends are compounding the problem.
Certificate volumes are growing
Organizations in the study reported certificate growth rates of 8% in year one, 10% in year two, and 12% in year three. At that pace, a 400,000-certificate environment grows to over 475,000 in just two years.
Every additional certificate adds provisioning, renewal, and deployment work. Without automation, that growth translates directly to headcount pressure.
As one customer noted: “The greatest testament to the value we’ve gotten from Keyfactor is the ability to scale certificate usage tenfold with the same number of resources.”
47-day TLS certificate lifespans are coming
The CA/Browser Forum is moving toward 47-day TLS certificate lifespans by 2029, down from the 398-day maximum that was in place just recently, and was reduced to 200 days as of March 2026. That shift will increase renewal frequency by roughly eight times for every TLS certificate in your environment.
For organizations still managing renewals manually, this change turns a labor problem into a staffing crisis. At 25 minutes per manual renewal, the math simply does not work.
One retail security leader described it this way: “All of the automation enabled by Keyfactor will help us with the visibility and automation we need to meet these industry changes.”
How to build your own business case for PKI modernization
The data above provides a strong foundation. Here is how to translate it into a business case tailored to your organization.
Map your current cost baseline
Start by cataloging your PKI infrastructure costs: CA servers, HSMs, licensing, and dedicated PKI staff. The Forrester benchmarks ($300,000 in hardware/licensing, $921,000 total infrastructure baseline) provide useful reference points for comparison. If your numbers are in the same range, you are likely carrying a similar cost structure.
Quantify the cost of manual certificate management
Identify your total certificate count, then apply the time benchmarks from the Forrester study to estimate your labor exposure:
| Action | Manual Process | Automated Process | Time Reduction |
|---|---|---|---|
| Provisioning | 90 minutes per certificate | 2 minutes | 97.8% |
| Renewal | 25 minutes | 1 minute | 96.0% |
| Deployment | 70 minutes | 15 minutes | 78.6% |
Multiply the time savings by your internal labor rate and certificate volume to calculate the annual value of automation at your scale.
Frame the ROI conversation for leadership
The strongest business cases frame PKI modernization as a business efficiency investment, not a security line item. Lead with the payback period (under six months) and net present value ($9.9 million for the composite organization). Connect those numbers to your own certificate volume and growth trajectory.
As one enterprise leader summarized: “The return on cost for Keyfactor is incredibly high. Probably in the millions of dollars a year.”
Keyfactor can help
Keyfactor’s platform addresses each of the cost categories outlined in this post:
- Replace legacy PKI with managed, cloud-delivered PKI.
Keyfactor’s EJBCA platform eliminates on-premises CA infrastructure and the $1.4 million in associated costs by moving PKI to a fully managed SaaS model. - Automate certificate lifecycle with Keyfactor Command.
Cut provisioning, renewal, and deployment labor by over 95%, recovering $7.5 million in combined savings across the certificate lifecycle. - Gain visibility to optimize certificate spending.
Discover where public certificates can be replaced with private issuance and right-size your certificate strategy.
Take the two-minute assessment to estimate your ROI and access the full Forrester study.
Got PKI cost questions? We’ve got answeres.
What is the total cost of ownership (TCO) of running PKI in-house?
For a typical large enterprise, the annual baseline runs approximately $921,000 in infrastructure costs alone, including hardware, licensing, and dedicated staff. This does not account for the labor costs of manual certificate management, which can add millions more over a three-year period.
What ROI can organizations expect from PKI modernization?
An independent Forrester study found that organizations modernizing with Keyfactor achieved a 356% risk-adjusted ROI, with total benefits of $12.7 million in present value against $2.8 million in total costs over three years.
How quickly does PKI modernization pay for itself?
The Forrester study documented a payback period of less than six months. The combination of immediate infrastructure savings and rapid labor cost reduction drives fast returns.
Where do the biggest cost savings come from?
Certificate renewal automation delivers the largest single category of savings at $4.3 million in present value, followed by incident reduction ($3.6 million), deployment automation ($1.7 million), provisioning automation ($1.5 million), and infrastructure consolidation ($1.4 million).
How will shorter TLS certificate lifespans affect PKI costs?
The CA/Browser Forum is moving toward 47-day TLS certificate lifespans by 2029, down from 398 days. This will increase renewal frequency by roughly eight times, making manual certificate management unsustainable at enterprise scale without automation.
What does PKI modernization cost?
Based on the Forrester study, the composite organization invested $485,000 annually in SaaS platform fees, $53,500 in professional services, and ongoing support from 2.5 internal FTEs. The total three-year cost in present value was $2.8 million.
How do I build a business case for PKI modernization?
Start by mapping your current PKI infrastructure costs and certificate count. Apply the Forrester time benchmarks (90 minutes per manual provisioning vs. 2 minutes automated) to estimate labor savings at your scale. Frame the conversation around business efficiency and lead with payback period and NPV.
Can private certificates replace public certificates to save money?
In many cases, yes. Organizations often use expensive public certificates for internal interfaces where a private certificate would suffice. Shifting even a portion of public certificates to private issuance can deliver meaningful, recurring cost savings depending on your certificate mix and volume.
