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 - Provisioned Concurrency is calculated from the time you enable it on your function until it is disabled, rounded up to the nearest five minutes. The price depends on the amount of memory you allocate to your function and the amount of concurrency that you configure on it.
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 ...
Pricing of lambda provisioned concurrency
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. More on reddit.com
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May 1, 2024Require guidance on calculating cost for Lambda with provisioned concurrency and ECS Fargate
I can provide guidance on calculating ... 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 ... More on repost.aws
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January 30, 2025amazon web services - Cost efficiency for AWS Lambda Provisioned Concurrency - Stack Overflow
I'm now looking at the native solution ... Lambda Concurrent Provisioning, which at first glance looks awesome, but when I start calculating, either I'm missing something, or this will simply be a large cost increase for a system with only medium load. Example, with prices from the eu-west-1 ... More on stackoverflow.com
AWS Lambda provisioned concurrency vs EC2 – SQLServerCentral Forums
AWS Lambda provisioned concurrency vs EC2 Forum – Learn more on SQLServerCentral More on sqlservercentral.com
Medium
mark-sailes.medium.com › the-other-feature-of-aws-lambda-provisioned-concurrency-saving-money-24e4e5086e1b
The Other Feature of AWS Lambda Provisioned Concurrency — Saving Money | by Mark Sailes | Medium
April 16, 2021 - ... Provisioned Concurrency is billed slightly differently, it has 3 components. Requests and duration are the same as regularly billing. Provisioned concurrency also has a set fee for each GB-second you reserve.
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.
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
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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.
Serverless
serverless.com › blog › aws-lambda-provisioned-concurrency
Provisioned Concurrency: What it is and how to use it with the Serverless Framework
Now you have the means to schedule the provisioned concurrency whenever you choose and so optimise the cost efficiency of it.
Ran The Builder
ranthebuilder.cloud › post › optimize-aws-lambda-with-dynamic-provisioned-concurrency
Optimize AWS Lambda with Dynamic Provisioned Concurrency
July 8, 2024 - In the early stages of developing our serverless SaaS services, we encountered significant latency across multiple Lambda functions. Implementing provisioned concurrency promptly resolved this issue. However, we soon encountered a notable increase in our AWS account charges.
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.
Datadog
datadoghq.com › blog › monitor-aws-lambda-provisioned-concurrency
Monitor AWS Lambda Provisioned Concurrency metrics with Datadog | Datadog
Serverless computing continues to be a growing trend, with AWS Lambda as a main driver of adoption. Today, AWS released Provisioned Concurrency, a new feature that makes AWS Lambda more resilient to cold starts during bursts of network traffic. If you’re running a consumer-facing application, slow page loads and request timeouts can degrade the user experience and lead to significant revenue loss.
Pulumi
pulumi.com › home › blog › provisioned concurrency: avoiding cold starts in aws lambda
Provisioned Concurrency: Avoiding Cold Starts in AWS Lambda | Pulumi Blog
March 19, 2025 - However, it comes at a cost in terms of a direct impact on billing and management overhead to provision concurrency at optimal levels. For high-load functions where utilization is continuously above a known level of requests, it makes sense to set the provisioned concurrency to that level to save money and have the guarantee of warm workers.
Dashbird
dashbird.io › home › knowledge base › aws lambda › provisioned concurrency
AWS Lambda Provisioned Concurrency | Dashbird
June 29, 2021 - Provisioned Concurrency is a step away from the serverless model of paying for what is used. By enabling it in a Lambda function, it is going back to renting compute capacity for time.
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
But provisioned concurrency can also help reduce costs. The GB second is much cheaper (about 70%) as with normal Lambda functions. However, you need to pay for it all the time. This approach only works if your Lambda function is almost never idle.
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 - Provisioned Concurrency also charges you for Requests and Duration when enabled and executed for your function. The service calculates the PC from when you enable it on your function to when you disable it, rounded up to the nearest five minutes. The price varies with the amount of memory you provide to your function AND the level of concurrency you configure on it.
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 - In this article, I’ll try to break down provisioned concurrency in an easily digestible way, then discuss when you should use it, and lastly show you how to configure your own provisioned concurrency in AWS.
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
Reserved concurrency acts as both a lower and upper bound - it reserves the specified capacity exclusively for your function while also preventing it from scaling beyond that limit. Configuring reserved concurrency for a function incurs no additional charges. Provisioned concurrency – This is the number of pre-initialized execution environments allocated to your function.
Hacker News
news.ycombinator.com › item
Provisioned concurrency is insanely expensive. If you have any kind of a thunder... | Hacker News
October 13, 2021 - I'm sure it has some use-cases in some kind of backoffice task queue scenario, but Lambda is nearly unusable in a web context unless you have a very trivial amount of traffic · Taking all of this into account, Lambda is then useful for a very small niche:
Lumigo
lumigo.io › guides › aws lambda performance optimization › aws lambda concurrency
AWS Lambda Concurrency - Lumigo
August 21, 2024 - After activating provisioned concurrency, you pay a set fee for the Lambda containers that are active and awaiting requests (even if you do not actually use the containers), and a slightly lower fee for actual function invocation time.
SQLServerCentral
sqlservercentral.com › forums › topic › aws-lambda-provisioned-concurrency-vs-ec2
AWS Lambda provisioned concurrency vs EC2 – SQLServerCentral Forums
May 5, 2022 - Now here is the big question : it'd be less expensive to have as many EC2 instances as the number of Lambda I plan to provision (since my lambdas are configured with 10GB of memory), but I'm not really sure if that would cause any problems with AWS, and I feel that provisioned concurrency on lambda would be more suited despite being more expensive.
Cloudchipr
cloudchipr.com › blog › aws-lambda-pricing
AWS Lambda Pricing Breakdown: Ultimate Guide 2025
Provisioned Concurrency keeps your ... responses. When enabled, you are billed based on the amount of concurrency configured, the memory allocated, and the function's execution duration....