OffsetC uses Plaid to connect your credit-card account securely. OffsetC does not receive your financial institution password. Plaid provides transaction information from the linked card to OffsetC, and OffsetC retains only transactions Plaid identifies as gas-station purchases. Please see our Privacy Policy for a fuller explanation of how we handle your data.

Connected transaction information is generally refreshed several times per day. If your purchase hasn’t appeared yet, check again later. If it still hasn’t appeared, contact us at the link above.

We take the purchase price from your transaction, divide it by the U.S. Energy Information Administration’s average price/gallon for the state where you purchased the gasoline (or your home ZIP code, if that isn’t available) to determine the number of gallons. We then use a U.S. Environmental Protection Agency estimate for the amount of CO2 from burning a gallon of gasoline to come up with the estimated emissions.

When you approve a purchase, OffsetC uses your payment to procure carbon credits through CNaught. CNaught retires the credits on behalf of OffsetC, and we track the portion attributable to your purchase.

Once we issue a certificate for the purchase, go to Activity > Transactions in the app and you’ll see an individual certificate for each purchase. Click on the link and you’ll see exactly what projects your offset supported.

If there is a problem with an OffsetC purchase, contact us at info@offsetc.com. We will correct duplicate or unauthorized charges, billing errors, and purchases we are unable to fulfill.

If the underlying gasoline transaction is reversed by your financial institution, OffsetC will ordinarily refund the related offset purchase automatically.

Carbon credits may be ordered for retirement shortly after payment is completed. A refund does not reverse or cancel credits that have already been retired.

Approved refunds are returned to the original payment method and may take 5–10 business days to appear, depending on your bank.