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.
Trek10
trek10.com › homepage › blog listing › the hidden cost of lambda provisioned concurrency pricing
The hidden cost of Lambda provisioned concurrency pricing
So if I’m not paying for state with my per-hour billing charges, what exactly is Lambda provisioned concurrency giving me for my money? In a nutshell, it’s a managed version of the pre-warmers that Lambda users have been hacking together for years. The warm environment in between those occasional warming events is something that regular Lambda already gives me for free.
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 ...
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.
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:
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.
Amazon Web Services
amazonaws.cn › en › lambda › pricing
Amazon Lambda Pricing
1 week ago - The monthly request price is ¥1.36 per 1 million requests and the free tier provides 1M requests per month. Total requests – Free tier requests = Monthly billable requests(25M+5M+2.5M) requests – 1M free tier requests = 31.5M Monthly billable requests · Monthly request charges = 31.5M ...
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.
Awsbites
awsbites.com › 129-lambda-provisioned-concurrency
Lambda Provisioned Concurrency
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.
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 - For example, if you have a function ... concurrent executions per second. 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 ...
Medium
aws.plainenglish.io › lambda-provisoned-concurrency-vs-snapstart-when-to-use-what-9736501e77a5
Lambda Provisoned Concurrency vs SnapStart — When to use what | by Abhijit Jadhav | AWS in Plain English
November 11, 2024 - The Provisioned Concurrency price is $0.0000044985 per GB-s Total period of time for which Provisioned Concurrency is enabled (seconds): 24 hours * 3,600 seconds = 86,400 seconds Total concurrency configured (GB): 1 * 1536MB/1024MB = 1.5 GB ...
AWS re:Post
repost.aws › questions › QUHrfRYdnySHWgAiqDQnmY8Q › pricing-on-lambda
Pricing on lambda | AWS re:Post
September 2, 2022 - Increasing the account's concurrency limit as no direct impact on pricing. With Lambda you only pay for what you use.
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.
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....
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.
Pump
pump.co › home › blog › understanding the aws lambda pricing and costs
Understanding the AWS Lambda Pricing and Costs
It is possible to achieve savings by combining functions that are not to be called unnecessarily and by using batch processing. Patterns related to invocation can be studied to identify cost-effective opportunities. An execution environment on your instance can receive up to ten requests per second, so the overall invocation ceiling equals your concurrency cap multiplied by 10.
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.
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.
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.