> ## Documentation Index
> Fetch the complete documentation index at: https://calcs.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.
# Choose a Plan
> Choose a Calcs.com plan and pay through the billing checkout page.
To choose a paid plan, you need to be an account admin. Go to the [billing checkout page](https://app.calcs.com/billing/change) in Calcs.com.
If you have any questions about this process, please contact us at [support@calcs.com](mailto:support@calcs.com), or give us a call on +1 303 309 9444 (USA/Canada) or +61 1300 846 800 (Australia).
On this page, you can select a plan and billing period (monthly or annual), and enter your credit card details. On successful checkout, your account will be instantly upgraded and you will be sent an email invoice. From then on, you can manage your plan at any time from **Settings > Billing > Manage subscription**, which redirects you to the Stripe customer portal. See [Change Your Users or Billing Period](/docs/plans/billing/change-users-billing-period).
## Frequently asked questions
We accept all major credit cards. Invoice payment is available for annual plans, contact us to arrange.
## Compare plans
Plan inclusions change as we release new calculators and features, so the authoritative list of what each plan unlocks lives on the [Calcs.com pricing page](https://calcs.com/pricing). At a high level, lower plans cover analysis and the most-used wood, steel, and concrete member calculators, while the [**Pro plan**](https://calcs.com/pricing) adds the broader concrete suite (including the concrete beam design tab), advanced lateral and foundation calculators, and additional region-specific code modules. Region-specific (US, AU/NZ, CA, etc.) calculator availability also varies by plan. Check the pricing page for the current breakdown.
The 14-day free trial gives you everything in the [Pro plan](https://calcs.com/pricing). See [See What's Included in the Free Trial](/docs/plans/free-trial/whats-included).
If you're not sure which plan you're on, go to **Settings > Billing** in Calcs.com. Your current plan is shown at the top of that page.