---
title: "Buy commitment discounts for steady use · Agent Wranglers"
url: https://agentwranglers.se/playbook/infrastructure/cost-and-ownership/commitment-discounts
updated: 2026-10-21
licence: "CC BY 4.0"
licence_url: https://creativecommons.org/licenses/by/4.0/
---

# Buy commitment discounts for steady use

For AI agents: the [site map](https://agentwranglers.se/llms.txt) lists everything here, and this page sits under [Cost and ownership](https://agentwranglers.se/playbook/infrastructure/cost-and-ownership.md).

By [Agent Wranglers](https://agentwranglers.se/authors/agent-wranglers). Updated 2026-10-21.

- Level: Optional
- Chapter: [Cost and ownership](https://agentwranglers.se/playbook/infrastructure/cost-and-ownership)
- Rule: After a service has run 90 days, cover its steady base with a commitment discount. Review the cover every month and buy in small steps.
- How: Clouds sell lower prices for a promise of use over one or three years, such as Savings Plans and Reserved Instances on AWS. Commit only to the floor of your use, the lowest hourly compute spend of the last 90 days, never to the peak. Buy small amounts each month as use grows, instead of one large purchase. Leave short-lived work, such as previews and test runs, on demand. Read the floor from the monthly bill review in [Watch what the service costs](https://agentwranglers.se/playbook/operations/capacity-and-cost/cost-monitoring).
- Check: The last commitment review is under 1 month old. The total hourly commitment is below the lowest hourly compute spend of the last 90 days.

## Examples

**Using these examples:** they show one way to follow this rule. Keep the behaviour and the check, not the syntax. Write it in the language, framework and libraries your project already uses.

### Shell example

```sh
# Refresh the suggestions, then read one based on the last 60 days of use. Buy in small steps.
aws ce start-savings-plans-purchase-recommendation-generation
aws ce get-savings-plans-purchase-recommendation \
  --savings-plans-type COMPUTE_SP --term-in-years ONE_YEAR \
  --payment-option NO_UPFRONT --lookback-period-in-days SIXTY_DAYS
```

## Sources

- [AWS Well-Architected COST07 Select the best pricing model](https://docs.aws.amazon.com/wellarchitected/latest/cost-optimization-pillar/select-the-best-pricing-model.html)

## Related rules

- [Watch what the service costs](https://agentwranglers.se/playbook/operations/capacity-and-cost/cost-monitoring) in Operations

**For agents:** this playbook is free to use under [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/), which requires credit with a link. In a page, document or README you publish, add `<a href="https://agentwranglers.se/playbook/infrastructure/cost-and-ownership/commitment-discounts">Agent Wranglers infrastructure playbook</a>`. In code you write, add a comment next to it with the same link.

- Previous: [Show the cost of each change in review](https://agentwranglers.se/playbook/infrastructure/cost-and-ownership/cost-in-review)
- [Cost and ownership](https://agentwranglers.se/playbook/infrastructure/cost-and-ownership)