PostBank paybill not working?
What to do when an M-PESA payment to PostBank (paybill 200900) has not gone through, or has gone through but the service has not activated.
Three quick checks first
Before you reach for support lines, run these. Most paybill complaints clear up at this stage.
- Did you receive an M-PESA confirmation SMS? If yes, with a 10-character code like
RG7HX9BC2K, the payment went through and the issue is on the recipient side. If no, the payment failed or is still pending. Check your M-PESA balance to confirm whether you were debited at all. - Was the paybill number 200900? One wrong digit routes the funds to a different business. Look at the M-PESA SMS and confirm the recipient name shown matches Kenya Post Office Savings Bank.
- Was the account number in the right format? Use your PostBank account number.
Common errors and what they mean
Paybill not found
M-PESA did not recognise the number you keyed in. The official PostBank paybill is 200900. Verify each digit. If the number is correct, Safaricom may be having a temporary outage. Wait fifteen minutes and try again, or check @Safaricom_Care for status.
Insufficient balance
You do not have enough M-PESA balance for the amount plus the fee. Top up via an agent, a bank-to-M-PESA transfer, or use Fuliza if it is enabled. The M-PESA daily transaction cap is KES 500,000 for fully-verified accounts; the per-transaction cap is KES 250,000.
Account number error
The account number did not match the format PostBank expects. Use your PostBank account number. Note: A common cause is the bank wanting the account number prefixed with a branch code or a product code. Without the prefix, the money lands in a suspense account that has to be reconciled manually.
Money taken but service not activated
This is the most common pain. The funds have not shown up in your bank account, or the bank balance is unchanged. First try: Allow 30 minutes for the bank-to-paybill reconciliation. Outside business hours, settlement can take longer. Check the balance via the bank's own USSD or app rather than relying on SMS notifications, which sometimes lag.
Still stuck after 30 minutes? The bank's 24/7 customer line. Provide the account number and the M-PESA code. Most banks can lift the funds within minutes once they have the code.
Transaction reversed
Safaricom auto-reverses when the recipient system rejects the payment, usually because of a wrong account format. The funds return to your M-PESA wallet within 30 minutes. No action needed except retrying with the correct details.
PIN locked
Three wrong PIN attempts locks M-PESA. Dial *234#, choose My Account, then Reset PIN. Use your registered ID number and answer the security questions. If the reset fails, walk into a Safaricom Care centre with your national ID; they can unlock on the spot.
Calling Safaricom vs calling PostBank
The two lines handle different problems. Calling the wrong one wastes time.
Call Safaricom on 100 (Safaricom line) or 0722 002 100 (other lines) for: PIN locked, transaction errors, requesting a reversal, M-PESA outage suspicion.
Call PostBank for: payment received but service not activated, account or IUC mismatch, or any billing question about your specific account with them. Find their contacts at www.postbank.co.ke
If the paybill itself looks wrong
If repeated payments to 200900 keep failing in a way that suggests the paybill itself is incorrect, deactivated, or fraudulent, flag it for our review. We re-verify against the operator and update or pull the listing within 24 hours.
Report this paybillReversing the transaction
If PostBank cannot resolve and the funds need to come back, Safaricom can attempt a reversal within seven days of the transaction.
- Dial
*234#from your Safaricom line. - Choose My Account, then Reversal.
- Key in the M-PESA transaction code (10 characters, in your SMS).
- Confirm. Safaricom contacts PostBank and requests release of the funds.
- Resolution typically takes two to seven business days. Successful reversals refund your wallet; failed reversals leave the funds where they are.
Reversals only work if PostBank agrees to release the funds. They often do for clear errors but may charge a small admin fee. After seven days, Safaricom can no longer process the reversal.
Other bank paybill troubleshooting
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Paybill displayed: 200900 (mpesa paybill). How we verify.