Function pricing (consumption vs premium) in Azure - When to Use Which

The Big Idea

What if you could pay only when your app works and never worry about slowdowns or wasted money?

The Scenario

Imagine you run a small online store and want to add a feature that sends a thank-you email every time someone buys something.

You try to set this up manually on a server you own, guessing how many emails you'll send each day and paying for the whole server even when no one buys anything.

The Problem

This manual way means you pay for the server all the time, even if no emails are sent.

Also, if suddenly many people buy at once, your server might slow down or crash because it can't handle the extra work.

Fixing this requires buying bigger servers or complex setups, which is slow and expensive.

The Solution

Azure Functions pricing models like Consumption and Premium solve this by charging you only for what you use or giving you guaranteed performance when needed.

Consumption pricing means you pay only when your function runs, perfect for unpredictable workloads.

Premium pricing gives you always-ready resources for steady or heavy use, avoiding delays and scaling smoothly.

Before vs After

✗ Before

Run server 24/7; pay fixed cost; risk overload

✓ After

Use Consumption: pay per execution; auto-scale; or Premium: always ready, better performance

What It Enables

You can build apps that scale automatically and cost less by paying only for what you use or choosing premium performance when needed.

Real Life Example

A photo-sharing app that sends notifications when friends comment can use Consumption pricing to save money during quiet times and Premium pricing during big events to handle many notifications instantly.

Key Takeaways

Manual server hosting wastes money and struggles with sudden demand.

Consumption pricing charges only when functions run, saving cost for variable use.

Premium pricing offers always-on performance for steady or heavy workloads.