How to keep AI costs inside project budgets for freelance coders

Q: Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier. It is a website with a public API. The API needs no key and gives stats, past reset history, forecasts and operational health. You can also opt in to free emails that are sent when a reset actually happens.

Freelance coders can keep AI costs inside project budgets by setting per-client limits, logging usage and planning around usage resets.

By SupaKeeper · 2026-10-25

SupaKeeper is published by LunarWerx, which makes some of the tools compared here.

To keep AI costs inside project budgets, set a budget for each client project, log AI use against that project, and review the log every week. Codex Forecast can help with one part of planning by estimating when Codex usage limits reset. ^[1]

Option	What it does for this job	What to check
Codex Forecast	Gives a statistical estimate of when OpenAI will next reset Codex usage limits. ^[1]	Whether reset timing answers the planning question your budget needs. It is free, with no account. ^[1]
AI provider billing or usage page	Not described on this page	Whether it shows spending per project and per client
Separate budgeting or expense tool	Not described on this page	Whether it can compare AI tool costs with each client budget

What you need before you start

Before you start, know which client projects use AI coding tools and how much each project is budgeted to spend on them. Write the budget for each project down, so it can be compared with actual use later. Many freelance coders work on several projects in the same weeks, so list which projects overlap.

Have access to the billing or usage page of every AI tool you pay for. Note the usage limit that applies to each tool you rely on, and confirm it on that tool's own page, because limits can change over time.

Decide how you will tie AI use to a client. A simple habit is to name each project in the tool you use, or to keep a short log of sessions by client. Either method makes it possible to see which project a cost belongs to.

Keep a record of the hours and tasks each client is paying for. With that record, you can judge whether AI use is supporting billed work or adding cost that the budget does not cover.

Step by step

Follow these steps in order. They work with any AI tool, so you can use them whichever tools a project needs.

Set a budget for each client project before the work starts. Include AI tools as their own line in the budget, so the cost is visible from the first day.

Record which tool and account you used for each task. A log with the project name, the date and the tool is enough to trace spending back to a client.

Review the log each week against the budget. Look for any project that is moving ahead of its plan, and note the cause while the details are still fresh.

Set a point at which AI use on a project pauses. When a project reaches that point, move the remaining work to manual steps, or raise the question with the client before spending more.

Watch the usage limit on each tool. When a limit is close to running out, decide which tasks wait for the next period, and put the most urgent client work first.

Read the log at the end of each project. Note which tasks used the most AI support and whether that spending matched the value delivered to the client.

Use the findings to set budgets for the next project. A quote that reflects past usage is easier to keep within budget than one based on guesses.

Recheck the method when your tools or clients change. A log that worked for one tool may need new columns for another.

Tools that can do it

Codex Forecast is made by the team that publishes this site.

Codex Forecast gives a statistical estimate of when OpenAI will next reset Codex usage limits. ^[1]

It is free, with no account and no paid tier. ^[1]

It is a website with a public API. ^[1] The API needs no key and gives stats, past reset history, forecasts and operational health. ^[1] The API also has a published OpenAPI specification, which is a standard written description of an API's endpoints. ^[1]

The site and API share a snapshot that is cached for up to five minutes. ^[1] Codex Forecast combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page. ^[1] When a measured refill and an announcement disagree, it trusts the measured refill. ^[1]

Each reset used in the forecast is listed with a link to where it was announced. ^[1] Its named-day predictions are scored in public, misses included. ^[1] You can opt in to free emails that are sent when a reset actually happens. ^[1]

Codex Forecast is an independent tracker and is not affiliated with OpenAI. ^[1]

Its output is about reset timing, so it works alongside the budget log from the steps above rather than replacing it. ^[1]

Other options are the billing or usage page of your AI provider, and a separate budgeting or expense tool. Check whether each one breaks spending down by project and by client, and whether it shows usage in time to act on it. Compare each option against the job of keeping costs inside each project budget.

Common mistakes to avoid

Avoid setting one total budget for all clients. A single total hides which project is overspending.

Avoid letting usage limits decide which client gets attention. Plan the work around the limits on purpose, so the most important projects are not left waiting by accident.

Avoid relying on memory for spending. Write usage down when it happens, and compare the totals with the budget every week.

Avoid choosing a tool only because of its description. Check whether its view covers the project and client split that your budgets need.

Frequently asked questions

How can freelance coders keep AI costs inside project budgets?

Freelance coders can keep AI costs inside project budgets by giving each client project its own spending limit, recording which tool and account was used for each task, and reviewing the totals every week. When a project nears its limit, narrow AI use on that project or move the remaining work to manual steps. The same record also shows which projects need a higher quote the next time they are priced.

Does Codex Forecast track AI spending by project?

Codex Forecast gives a statistical estimate of when OpenAI will next reset Codex usage limits. ^[1] It is free, with no account and no paid tier. ^[1] Its output is about reset timing, so use it alongside your own budget log for spending by project. ^[1]

Is Codex Forecast free to use?

Codex Forecast is free, with no account and no paid tier. ^[1] It is a website with a public API. ^[1] The API needs no key and gives stats, past reset history, forecasts and operational health. ^[1] You can also opt in to free emails that are sent when a reset actually happens. ^[1]

Is Codex Forecast connected to OpenAI?

Codex Forecast is an independent tracker and is not affiliated with OpenAI. ^[1] It lists each reset it uses with a link to where that reset was announced. ^[1] When a measured refill and an announcement disagree, it trusts the measured refill. ^[1]

How current is the reset information on Codex Forecast?

The site and API share a snapshot that is cached for up to five minutes. ^[1] Codex Forecast combines an account it checks every 60 seconds, OpenAI staff announcements and the OpenAI status page. ^[1] Its named-day predictions are scored in public, misses included. ^[1]