I think about provisioned concurrency as something that eliminates the cold starts and not something that saves money. There is a bit of saving if you can keep the lambda function running all the time (100%) utilization, but as you've calculated it becomes quite expensive when the provisioned capacity sits idle.
Answer from Tamás Sallai on Stack OverflowReddit
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r/aws on Reddit: Pricing of lambda provisioned concurrency
May 1, 2024 -
I was trying to setup provisioned concurrency in AWS lambda, and wanted some guidance on the cost overhead that I'll bear.
Let's say I decide to setup provisioned concurrency as 5.
My memory size 3072 MB.
Estimated total cost per month: $0.00000005 (cost per ms for 3072 mb) * 1000*60*60*24*30 (total ms in a month) * 5 (provisioned concurrency) = 648 $
A) is this calculation correct?
B) With every update do I have to deploy a new version and setup concurrency?
Top answer 1 of 2
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Hello, You may find this doc helpful in accurately estimating and calculating your concurrency: https://go.aws/3Wn9KYQ . If not, feel free to reach out to Support for additional insight: http://go.aws/support-center . - Marc O.
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Calc looks correct to me, but don't forget to factor in the cost of cold starts and potential idle time. And yeah, updating your Lambda function does require a new version deployment and re-configuring concurrency.
Amazon Web Services
aws.amazon.com › compute › aws lambda › pricing
AWS Lambda Pricing
1 week ago - AWS Lambda participates in Compute Savings Plans, a flexible pricing model that offers low prices on Amazon Elastic Compute Cloud (Amazon EC2), AWS Fargate, and Lambda usage, in exchange for a commitment to a consistent amount of usage (measured in $/hour) for a one- or three-year term. With Compute Savings Plans, you can save up to 17 percent on AWS Lambda. Savings apply to duration and Provisioned Concurrency. Learn more · Calculate your AWS Lambda and architecture cost in a single estimate.
Videos
Amazon Web Services
amazonaws.cn › en › lambda › pricing
Amazon Lambda Pricing
1 week ago - You executed the function 1.2M ... region, operated by Sinnet · Provisioned Concurrency charges The Provisioned Concurrency price is ¥ 0.0000407741 for every GB-second...
Medium
aws.plainenglish.io › what-is-provisioned-concurrency-and-when-should-you-use-it-6eab44e9cd46
What is Provisioned Concurrency- and When Should You Use It? | by Joseph Schambach | AWS in Plain English
June 2, 2025 - Provisioning concurrency for your Lambda increases reaction time significantly because it reduces the need for cold starts and latency. This does come at a cost, which is different based on your region. See the AWS Lambda pricing calculator and look for the provisioned concurrency pricing section ...
AWS re:Post
repost.aws › questions › QUHrfRYdnySHWgAiqDQnmY8Q › pricing-on-lambda
Pricing on lambda | AWS re:Post
September 2, 2022 - AWS Calculator can help with your cost estimations. https://calculator.aws/#/addService/Lambda ... Increasing the account's concurrency limit as no direct impact on pricing. With Lambda you only pay for what you use.
Lumigo
lumigo.io › guides › aws lambda 101 › aws lambda cost factors, cost comparisons and optimization [2024]
AWS Lambda Cost Factors, Cost Comparisons and Optimization [2024]
August 30, 2024 - This feature incurs additional ... ... Provisioned concurrency costs are calculated from the time it is enabled until it is disabled, rounded to the nearest five minutes....
Cloudchipr
cloudchipr.com › blog › aws-lambda-pricing
AWS Lambda Pricing Breakdown: Ultimate Guide 2025
Understand AWS Lambda pricing with a detailed breakdown and examples, including compute, storage, and concurrency costs.
AWS re:Post
repost.aws › questions › QUKvpjIg9xSIy6fyBJxQxBdA › require-guidance-on-calculating-cost-for-lambda-with-provisioned-concurrency-and-ecs-fargate
Require guidance on calculating cost for Lambda with provisioned concurrency and ECS Fargate | AWS re:Post
January 30, 2025 - I can provide guidance on calculating costs for Lambda with provisioned concurrency and ECS Fargate based on the configurations you've mentioned, but I cannot provide information on internal AWS pricing or discounts. Here's how you can approach the cost calculation for each service: ... Ephemeral storage is included in the base price for up to 20 GB, so no additional cost.
Dashbird
dashbird.io › home › knowledge base › aws lambda › provisioned concurrency
AWS Lambda Provisioned Concurrency | Dashbird
June 29, 2021 - The amount of memory needed by a function is usually fixed and determined by the workload, so developers are left with only one dimension to analyze Lambda costs: duration of the executions. Additionally to duration, with Provisioned Concurrency developers must also observe:
The Burning Monk
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The best ways to save money on Lambda | theburningmonk.com
September 16, 2023 - For example, one provision concurrency for a 128MB function has an uptime cost of just $1.40 per month, plus variable costs based on the no. of invocations and execution time. But one provision concurrency for a 10GB function would have an uptime ...
Costgoat
costgoat.com › pricing › aws-lambda
AWS Lambda Pricing Calculator & Cost Guide (Dec 2025)
3 weeks ago - This is a premium feature with additional costs beyond standard Lambda pricing. ... $0.0000041667 per GB-second for keeping functions warm. Calculated as: memory (GB) × concurrent executions × hours per month × idle rate.
CloudZero
cloudzero.com › home › blog › a simple guide to aws lambda pricing and cost management
A Simple Guide To AWS Lambda Pricing And Cost Management
December 12, 2024 - When enabled, provisioned concurrency keeps your functions warm. This ensures they are ready to respond immediately, reducing latency. You’re charged based on the concurrency level and the amount of memory allocated to the function, with additional charges for requests and duration. The following formula will help you calculate your AWS Lambda costs in GB-seconds:
Amazon Web Services
docs.aws.amazon.com › aws lambda › developer guide › understanding lambda function scaling › configuring provisioned concurrency for a function
Configuring provisioned concurrency for a function - AWS Lambda
Configuring provisioned concurrencyAccurately estimating required provisioned concurrency for a functionOptimizing function code when using provisioned concurrencyUsing environment variables to view and control provisioned concurrency behaviorUnderstanding logging and billing behavior with provisioned concurrencyUsing Application Auto Scaling to automate provisioned concurrency management · In Lambda, concurrency is the number of in-flight requests that your function is currently handling.
Awsbites
awsbites.com › 129-lambda-provisioned-concurrency
Lambda Provisioned Concurrency
Luciano: So provision concurrency cost is calculated from the time you enable it for a specific function until you disable it, if you, of course, ever disable it. And it's rounded up to the nearest five minutes. So imagine that you, I don't know, enable it for seven minutes before disabling it, you will be paying for 10 minutes. The price depends on the amount of memory you allocate...
Cloudforecast
cloudforecast.io › home › aws pricing & cost optimization › aws pricing calculator 2025 guide
AWS Pricing Calculator 2025 Guide
February 25, 2025 - The provisioned concurrency settings result in a monthly estimated cost of $62.57. And that’s it for Lambda–the remaining sections don’t pertain to our application. In total, our Lambda estimate comes out to $67.63 per month (Provisioned ...
Trek10
trek10.com › homepage › blog listing › the hidden cost of lambda provisioned concurrency pricing
The hidden cost of Lambda provisioned concurrency pricing
Yan Cui, in his thorough breakdown of the ins and outs of provisioned concurrency, points out that provisioning can actually be cheaper than on-demand Lambda invocations if you are consistently using your provisioned concurrency near 100% capacity. But wait a second.
How-To Geek
howtogeek.com › home › cloud › should you use provisioned concurrency for aws lambda functions?
Should You Use Provisioned Concurrency for AWS Lambda Functions?
July 7, 2023 - Overall, provisioned concurrency doesn't cost much more than regular Lambda functions. You can use AWS's Pricing Calculator to figure out how much it will cost you personally.
ProjectPro
projectpro.io › blog › decoding aws lambda pricing optimization - how to save big?
Decoding AWS Lambda Pricing Optimization - How to Save Big?
Each Lambda function has free access to 512 MB of ephemeral storage. In the AWS Lambda memory pricing plan, you only pay for the extra ephemeral storage you specify. The duration of provisioned concurrency is estimated to the nearest five minutes ...