Legal document

Refund & Cancellation Policy

Last updated: 2026-07-15

This summary is provided for transparency and is not specific legal or tax advice. Questions? Contact support@billsos.com.

This Policy applies to all BillsOS subscriptions.

1. Plans and Billing

BillsOS offers three plans:

Starter — Free, no charge
Freelancer — ฿390/mo or ฿3,900/yr
Pro — ฿490/mo

Billing is handled by Stripe, our approved payment processor. BillsOS charges no fee on the PromptPay payments you receive from your own clients — your BillsOS subscription and your PromptPay income are entirely separate.

2. Cancellation

You may cancel your subscription at any time from the in-app billing portal (Stripe Customer Portal). There is no penalty and no long-term contract.

After cancellation, access to paid plan features continues until the end of the already-paid billing period.

3. Refunds

Payments for BillsOS subscriptions are generally non-refundable as the service is delivered and accessible immediately upon payment.

No pro-rated refunds are provided for partial billing periods unless required by applicable law.

Exception: Cavastir may, at its sole discretion, consider a refund where a serious technical fault caused by BillsOS prevents access to the Service for an extended period.

4. Billing Edge Cases

Failed payment or a declined card: Stripe automatically retries on its normal schedule. If it still fails, your account may be temporarily moved to the Starter (free) plan until you update your payment method.
Changing plans mid-cycle: upgrades take effect immediately and Stripe prorates the remaining period. Downgrades take effect at the next billing cycle — you keep the current plan's features until the paid period ends.
Duplicate or incorrect charges: if you see what looks like a duplicate or incorrect line item on your Stripe invoice, please send us a screenshot at our support email. We will investigate and correct or refund it if the error is on our end.
Currency and conversion: all billing is in Thai baht (THB). If your card is issued in another currency, your card issuer sets the conversion rate and may add a foreign-transaction fee — this is outside Cavastir's control.

5. How to Request Assistance

If you have questions about your billing, wish to cancel, or want to discuss an exceptional circumstance, please contact support@billsos.com.

We aim to respond within 1–2 business days.

6. Starter (Free) Plan Exception

The Starter plan is at no charge; therefore no billing occurs and no refund scenario applies.