Are free SSL certificates safe?

Yes. Let's Encrypt certificates provide the same level of encryption as paid DV certificates. The difference is purely in validation level and features (wildcard support, warranty, trust indicators). For most sites, Let's Encrypt is perfectly secure.

What is the difference between DV, OV, and EV?

DV (Domain Validation) verifies domain ownership only—fastest and cheapest. OV (Organization Validation) verifies the organization's identity. EV (Extended Validation) requires extensive business verification and may show the company name in the browser. All three provide the same encryption strength.

Do I need a paid SSL certificate?

For most websites, Let's Encrypt (free DV) is sufficient. Consider paid certificates if you need: wildcard coverage without ACME challenges, OV/EV for compliance or trust, SAN certificates for multiple root domains, or a warranty from the certificate authority.

How much does a wildcard SSL cost?

Wildcard DV certificates cost $50–150/year from providers like Sectigo, DigiCert, or GlobalSign. Let's Encrypt offers free wildcards but requires DNS-01 challenge validation. ACM provides free wildcards for AWS services.

What happens if my SSL expires?

Browsers will show a full-page security warning, blocking most visitors. Google may de-index HTTPS pages with expired certificates. Set up automated renewal and monitoring alerts at least 30 days before expiration to prevent outages.

Can I use one certificate for multiple domains?

Yes, using a SAN (Subject Alternative Name) or UCC (Unified Communications Certificate). These can cover multiple root domains (example.com, example.org, example.net) plus subdomains. Pricing is usually a base fee plus $10–30 per additional domain.

SSL Certificate Cost Calculator

Calculate SSL/TLS certificate costs for single, wildcard, and multi-domain certificates. Compare Let's Encrypt, DV, OV, and EV certificate pricing.

Certificate Type

Certificate PriceTypical: $50–$200

$/yr

Domains / Subdomains

Renewal Price

$/yr

Projection Period

Mgmt Hours / Cert / YrRenewal, install, monitoring

hrs

Admin Hourly Rate

$/hr

Total Cost

$540.00

Over 3.00 year(s), 5.00 domain(s)

Average / Year

$180.00

All-in annual cost

Cost per Domain

$108.00

Total ÷ 5.00 domains

Per Domain / Year

$36.00

Amortized per domain per year

Initial Purchase

$100.00

1 cert(s)

Total Renewals

$200.00

2 renewal(s)

Management Cost

$240.00

1.00 hrs × $80.00/hr × 3 yrs

Let's Encrypt Savings

$300.00

Cert cost eliminated (mgmt remains)

Cost Breakdown

Initial Cert

$100.00

Renewals

$200.00

Management

$240.00

Certificate Strategy Comparison

Strategy	Cert $/Domain/Yr	Mgmt $/Yr	Annual Total	3-Year Total
Let's Encrypt (free)	$0.00	$800.00	$800.00	$2,400.00
Individual DV Certs	$100.00	$400.00	$900.00	$2,700.00
Wildcard DV	$60.00	$80.00	$380.00	$1,140.00
SAN Certificate	$60.00	$80.00	$380.00	$1,140.00
ACM (AWS Free) ✅	$0.00	$40.00	$40.00	$120.00

Certificate Type Reference

Type	Validation	Price Range	Best For
DV Single	Domain only	$0–$30/yr	Blogs, personal sites
DV Wildcard	Domain only	$50–$200/yr	Sites with many subdomains
OV Single	Organization	$50–$250/yr	Business websites
OV Wildcard	Organization	$150–$500/yr	Enterprise with subdomains
EV	Extended	$100–$500/yr	E-commerce, banking
SAN/UCC	Varies	$80–$400/yr	Multiple root domains
Let's Encrypt	Domain only	Free	Any site (automated)
ACM (AWS)	Domain only	Free	AWS ALB/CloudFront

Planning notes, formulas, and examples

About the SSL Certificate Cost Calculator

SSL/TLS certificates are essential for encrypting web traffic and are now required for SEO, browser trust, and compliance. While Let's Encrypt provides free DV certificates, organizations often need paid certificates for wildcard coverage, extended validation (EV), or multi-domain (SAN) support.

Pricing ranges dramatically: a single-domain DV certificate can cost $0–10/year, a wildcard DV is $50–150/year, OV certificates run $50–200/year, and EV certificates cost $100–500/year. Multi-domain (SAN) certificates charge a base price plus per-additional-domain fees.

This calculator estimates the total cost of SSL certificates based on type, number of domains, and term length. Use it to compare the cost of individual certificates versus wildcard or SAN certificates, and to determine whether paid certificates are worth the investment over free alternatives.

When This Page Helps

Free certificates from Let's Encrypt work well for simple sites, but organizations with many subdomains, compliance requirements, or customer-facing trust needs often require paid certificates. This calculator helps you compare the total cost of different certificate strategies and avoid overpaying.

How to Use the Inputs

Enter the price per certificate (or select a type to see typical pricing).
Set the number of domains or subdomains to cover.
Enter the annual renewal cost (may differ from initial purchase).
Set the number of years for the total cost projection.
Review the total certificate cost over the period.

Formula used

Initial Cost = cert_price × domains
Renewal Cost = renewal_price × domains × (years − 1)
Total = Initial Cost + Renewal Cost

Example Calculation

Result: $675.00 over 3 years

Three wildcard DV certificates at $75/year each. Year 1: $75 × 3 = $225. Years 2–3: $75 × 3 × 2 = $450. Total: $675 over 3 years. Alternatively, a single SAN certificate covering all three domains might cost $150–200/year, potentially saving $25–75/year.

Tips & Best Practices

Use Let's Encrypt for simple DV certificates on personal sites and internal services.
Wildcard certificates (*.example.com) cover unlimited subdomains and often cost less than multiple single-domain certs.
EV certificates show the organization name in some browsers but are not required for most sites.
ACM (AWS Certificate Manager) provides free TLS certificates for use with ALB, CloudFront, and API Gateway.
Set up automated renewal with certbot or your CDN to avoid certificate expiration outages.
SAN certificates can cover different root domains (example.com AND example.org) on one cert.

SSL Certificate Type Comparison

Single-Domain DV: $0–10/year, covers one FQDN. Wildcard DV: $50–150/year, covers *.domain.com. OV: $50–200/year, shows organization in cert details. EV: $100–500/year, highest validation level. SAN/UCC: $100–300/year base + $10–30/additional domain. Let's Encrypt: free DV and wildcard with 90-day renewal.

Free Certificate Options

Let's Encrypt: free DV and wildcard via ACME protocol. AWS ACM: free for ALB, CloudFront, API Gateway. Cloudflare: free Universal SSL for proxied domains. Google-managed: free for GCP load balancers. For AWS-native workloads, ACM eliminates all certificate costs.

Certificate Management at Scale

Organizations with 50+ certificates should consider certificate management platforms like Venafi or DigiCert CertCentral. Automated lifecycle management prevents expiration outages. For cloud-native workloads, service mesh solutions like Istio or Linkerd provide automatic mTLS with built-in certificate rotation.

Sources & Methodology

Last updated: February 8, 2026

Frequently Asked Questions

Yes. Let's Encrypt certificates provide the same level of encryption as paid DV certificates. The difference is purely in validation level and features (wildcard support, warranty, trust indicators). For most sites, Let's Encrypt is perfectly secure.