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 - Monthly ephemeral storage charges: ... price is $0.0000000309 for every GB-second and Lambda provides 512 MB of storage at no additional cost. Total compute (seconds) = 6M * 280ms = 1,680,000 seconds Total billable ephemeral storage = 2048 MB – 512 MB = 1536 MB Total ephemeral storage (GB-s) = 1,680,000 * 1536 MB/1024 MB = 2,520,000 GB-s Monthly ephemeral storage charges = 2,520,000 * $0.0000000309 = $0.08 · Total monthly charges: Total charges = Compute charges + Request charges = $105.33 + $1 + $0.08 = $106.41 per month · Enable ...
Reddit
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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.
Dashbird
dashbird.io › home › knowledge base › aws lambda › provisioned concurrency
AWS Lambda Provisioned Concurrency | Dashbird
June 29, 2021 - Another problem is the complexity that the pricing model for Provisioned Concurrency3 adds to the overall Lambda financials. 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 ...
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.
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.
The Burning Monk
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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 ...
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.
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 › home › aws lambda provisioned concurrency: the end of cold starts
AWS Lambda Provisioned Concurrency: The End of Cold Starts - Lumigo
June 25, 2024 - Eagle-eyed readers might notice that $0.035 + $0.015 = $0.05 per GB-hour for a fully utilized concurrent execution. Which is $0.01 (16%) cheaper than on-demand concurrency! So a system with high Provisioned Concurrency utilization can also save ...
Amazon Web Services
amazonaws.cn › en › lambda › pricing
Amazon Lambda Pricing
1 week ago - You only pay for the amount of concurrency that you configure and for the period of time that you configure it. When Provisioned Concurrency is enabled for your function and you execute it, you pay for Requests and Duration based on the prices below. If the concurrency for your function exceeds the configured concurrency, you will be billed for executing the excess functions at the rate outlined in the Amazon Lambda Pricing section above.
Lumigo
lumigo.io › guides › aws lambda performance optimization › aws lambda concurrency
AWS Lambda Concurrency - Lumigo
August 21, 2024 - After activating provisioned ... containers), and a slightly lower fee for actual function invocation time. The cost per requests remains the same....
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 - 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:
Cloudchipr
cloudchipr.com › blog › aws-lambda-pricing
AWS Lambda Pricing Breakdown: Ultimate Guide 2025
AWS Lambda’s free tier is designed to support low-traffic applications or allow for testing at no cost. Each month, the free tier includes: ... For usage beyond these limits, Lambda offers tiered pricing and additional savings through AWS Compute Savings Plans. By committing to a consistent usage level for one or three years, these plans can offer up to 17% savings on duration and Provisioned Concurrency costs.
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.
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 - While hand-crafted Lambda warmers are virtually free, provisioned concurrency can be costly.
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 28, 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
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.