How does EFS Infrequent Access pricing work?

EFS IA storage costs significantly less per GB than Standard (roughly 92% cheaper), but you pay a per-read fee each time an IA file is accessed. The estimator lets you specify what percentage of your data is in IA and how often it is read so you can find the cost-optimal lifecycle threshold.

What is the difference between Bursting and Elastic throughput?

Bursting throughput scales with the size of your file system and uses burst credits for spikes. Elastic throughput automatically scales up to 10 GiB/s with no provisioning and charges only for what you use, making it ideal for spiky, unpredictable workloads. The estimator models both so you can compare.

EFS Cost Estimator

StorageAWS

Estimate monthly EFS costs across storage classes and throughput modes.

EFS Cost Configuration

Storage Amount (GB)

Storage Class

Throughput Mode

Raw Output

Output will appear here...

About This Tool

The EFS Cost Estimator calculates your expected monthly spend on Amazon Elastic File System based on storage volume, throughput mode, and storage class mix. It supports EFS Standard, EFS Infrequent Access (IA), EFS One Zone, and One Zone-IA storage classes as well as Bursting, Provisioned, and Elastic throughput modes. You can model different usage patterns to see how lifecycle policies that move cold files to IA can dramatically lower costs. The tool provides a clear cost breakdown so you can make informed decisions about shared file storage for EC2, ECS, Lambda, and EKS workloads.

When to Use This Tool

•Estimating monthly EFS costs for a shared CMS content store accessed by multiple EC2 instances.
•Modeling the savings from enabling EFS Lifecycle Management to move infrequently accessed files to the IA storage class.
•Comparing Provisioned Throughput costs against Elastic Throughput for workloads with unpredictable access patterns.
•Budgeting EFS costs for containerized workloads on EKS or ECS that require persistent shared storage.

Frequently Asked Questions

How does EFS Infrequent Access pricing work?: EFS IA storage costs significantly less per GB than Standard (roughly 92% cheaper), but you pay a per-read fee each time an IA file is accessed. The estimator lets you specify what percentage of your data is in IA and how often it is read so you can find the cost-optimal lifecycle threshold.
What is the difference between Bursting and Elastic throughput?: Bursting throughput scales with the size of your file system and uses burst credits for spikes. Elastic throughput automatically scales up to 10 GiB/s with no provisioning and charges only for what you use, making it ideal for spiky, unpredictable workloads. The estimator models both so you can compare.

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