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 OverflowAmazon Web Services
aws.amazon.com › compute › aws lambda › pricing
AWS Lambda Pricing
1 week ago - Total compute (seconds) = 6M * ... = $0.08 · Total monthly charges: Total charges = Compute charges + Request charges = $105.33 + $1 + $0.08 = $106.41 per month · Enable Provisioned Concurrency for your Lambda functions for greater control over your serverless application ...
Reddit
reddit.com › r/aws › pricing of lambda provisioned concurrency
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
1
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.
2 of 2
1
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.
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.
Amazon Web Services
amazonaws.cn › en › lambda › pricing
Amazon Lambda Pricing
1 week ago - Example 2: Let’s assume you allocated 256 MB of memory to your function and enabled Provisioned Concurrency on it for 31 days. The concurrency that you configured was 100. You executed the function 100 million times during the 31 days and the function ran for 1 second each time. Your charges would be calculated as follows:
Tencent Cloud
tencentcloud.com › document › product › 583 › 44256
Provisioned Concurrency Price | Tencent Cloud
*Idle provisioned concurrency fees = number of idle instances * configured memory size * idle duration * idle provisioned concurrency unit price* Number of idle instances: SCF counts the maximum concurrency of a version at a 10-second granularity.
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
Dashbird
dashbird.io › home › knowledge base › aws lambda › provisioned concurrency
AWS Lambda Provisioned Concurrency | Dashbird
June 29, 2021 - Additionally to duration, with Provisioned Concurrency developers must also observe: ... Consider a function with 512 MB allocated running for 31 days. It receives 10 Million requests, with a duration of 2 seconds, each. In the traditional, on-demand pricing model, this function would cost:
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.
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.
Cloudforecast
cloudforecast.io › home › aws pricing & cost optimization › complete aws lambda pricing and optimization guide
Complete AWS Lambda Pricing and Optimization Guide
September 28, 2023 - Provisioned concurrency solves for cold start by enabling Lambda functions to be initialized for high workloads in milliseconds. AWS provides a pricing calculator to estimate the cost of using Lambda for your applications.
Cloudchipr
cloudchipr.com › blog › aws-lambda-pricing
AWS Lambda Pricing Breakdown: Ultimate Guide 2025
Provisioned Concurrency: Billed from the time you enable it until you disable it, rounded up to the nearest five minutes. Duration: Calculated from the time your code begins executing until it terminates, rounded up to the nearest millisecond.
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 ...
Cloudforecast
cloudforecast.io › home › aws pricing & cost optimization › aws pricing calculator 2025 guide
AWS Pricing Calculator 2025 Guide
February 25, 2025 - After all this, our service settings results in a monthly estimated cost of $5.06 (including the free tier). The next section illustrates why you’ll often need to have some prerequisite AWS knowledge to make best use of the Pricing Calculator. It concerns Provisioned Concurrency, which is the number of “pre-warmed” environments that are always ready to handle incoming requests.
AWS Fundamentals
awsfundamentals.com › blog › aws-lambda-pricing-a-complete-guide-to-understanding-the-cost-of-the-serverless-service
AWS Lambda Pricing: A Complete Guide
Skip the 300-page docs. Our Lambda cheat sheet covers everything from cold starts to concurrency limits - the stuff we actually use daily.
The Burning Monk
theburningmonk.com › home › the best ways to save money on lambda
The best ways to save money on Lambda | theburningmonk.com
September 16, 2023 - Because provisioned concurrency has an uptime cost per month per unit of concurrency. And that cost scales proportionally to the amount of memory allocated to the function. 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...
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.
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 26, 2025 - Remember that actual costs may vary based on usage patterns and other factors. For internal pricing or specific discount percentages, you would need to consult with your organization's AWS account manager or financial team, as these are not publicly available and may be subject to specific agreements between AWS and your company. Sources Serverless Computing – AWS Lambda Pricing – Amazon Web Services Double charge for provisioned lambdas | AWS re:Post Serverless Compute Engine–AWS Fargate Pricing–Amazon Web Services