button.
## Step 3 — Buy a specific amount instead (optional)
In the **Custom Credit Purchase** section of the **Buy Credits** page. To buy a specific amount rather than a pack:
* Enter a whole number of credits (from 1 to 10,000) in the **Number of credits** field.
* An **Estimated cost** in Singapore dollars (SGD $0.80 per credit) appears once the amount is valid, and the 
button stays inactive until then.
* You can optionally add a note in the **Customer Note** field before buying.
## Step 4 — Complete the payment
In Stripe Checkout. Complete payment. When you finish — or if you cancel — BriefTech returns you to the **Usage/Billing** page. Credits from a successful payment are added automatically; open the **Purchase History** tab there to confirm the purchase and its status.
## Other ways to start a top-up
You can also reach this top-up flow two other ways:
* On the **Usage/Billing** page, click **Buy credits** in the credit-balance panel.
* When something you're doing needs more credits than you have, you can also start from an **Insufficient Credits** prompt: for most actions it offers a **Buy Credits** button that opens the **Usage/Billing** page.
Your credits are now on your balance, and the purchase is recorded in the **Purchase History** tab on the **Usage/Billing** page.
See [Credit costs and pricing](/reference/credit-costs-and-pricing.md).
## Related
| How credits work | What credits measure and how your balance is calculated. | How credits work |
| See what consumed credits | Review your usage history to see which operations consumed credits. | See what consumed credits |
| Credit costs and pricing | How credits are consumed, what they cost, and when they expire. | Credit costs and pricing |
| Check your storage usage | See how much of your storage allowance you have used, from the Usage/Billing page. | Check your storage usage |
| File size and storage limits | Maximum file sizes, storage allowance, and path length limits. | File size and storage limits |