> ## Documentation Index
> Fetch the complete documentation index at: https://pipedream.com/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# FAQ

export const MEMORY_LIMIT = '256MB';

## How does workflow memory affect credits?

Pipedream charges credits proportional to the memory configuration. If you run your workflow at the default memory of {MEMORY_LIMIT}, you are charged one credit each time your workflow executes for 30 seconds. But if you configure your workflow with `1024MB` of memory, for example, you’re charged **four** credits, since you’re using `4x` the default memory.

## Are there any limits on paid tiers?

**You can run any number of credits for any amount of compute time** on any paid tier. [Other platform limits](/workflows/limits/) apply.

## When am I billed for paid plans?

When you upgrade to a paid tier, Stripe will immediately charge your payment method on file for the platform fee tied to your plan (see [https://pipedream.com/pricing](https://pipedream.com/pricing))

If you accrue any [additional credits](/pricing/#additional-credits), that usage is reported to Stripe throughout the [billing period](/pricing/#billing-period). That overage, as well as the next platform fee, is charged at the start of the *next* billing period.

## Do any plans support payment by invoice, instead of credit / debit card?

Yes, Pipedream can issue invoices on the Business Plan. [Please reach out to support](https://pipedream.com/support)

## How does Pipedream secure my credit card data?

Pipedream stores no information on your payment method and uses Stripe as our payment processor. [See our security docs](/privacy-and-security/#payment-processor) for more information.

## Are unused credits rolled over from one period to the next?

**No**. On the Free tier, unused included daily credits under the daily limit are **not** rolled over to the next day.

On paid tiers, unused included credits are also **not** rolled over to the next month.

## How do I change my billing payment method?

Please visit your [Stripe customer portal](https://pipedream.com/settings/billing?rtsbp=1) to change your payment method.

## How can I view my past invoices?

Invoices are emailed to your billing email address. You can also visit your [Stripe customer portal](https://pipedream.com/settings/billing?rtsbp=1) to view past invoices.

## Can I retrieve my billing information via API?

Yes. You can retrieve your usage and billing metadata from the [/users/me](/rest-api/#get-current-user-info) endpoint in the Pipedream REST API.

## How do I cancel my paid plan?

You can cancel your plan in your [Billing and Usage Settings](https://pipedream.com/settings/billing). You will have access to your paid plan through the end of your current billing period. Pipedream does not prorate plans cancelled within a billing period.

If you’d like to process your cancellation immediately, and downgrade to the free tier, please [reach out](https://pipedream.com/support).

## How do I change the billing email, VAT, or other company details tied to my invoice?

You can update your billing information in your [Stripe customer portal](https://pipedream.com/settings/billing?rtsbp=1).

## How do I contact the Pipedream team with other questions?

You can start a support ticket [on our support page](https://pipedream.com/support). Select the **Billing Issues** category to start a billing related ticket.