To avoid ACH returns, M1 does not accept ACH relationships established through the following institutions and routing numbers.
If your bank falls on the list below, please connect an alternative account to fund your M1 account.
| Bank | Routing Number |
| American Express Centurion Bank | 124071889 |
| Bancorp, NetSpend Bank | 31101169 |
| Bancorp, NetSpend Bank | 114924742 |
| BBVA/Simple | 62201601 |
| Central Bank of Kansas City | 101019084 |
| Chime Bank | 31101279 |
| Chime Bank | 103100195 |
| Citizens Bank | 11500120 |
| Citizens Bank | 21313103 |
| Citizens Bank | 31101143 |
| Citizens Bank | 36076150 |
| Citizens Bank | 221370030 |
| Citizens Bank | 222371054 |
| Citizens Bank | 241070417 |
| Citizens Bank | 271071321 |
| Citizens Bank | 11001331 |
| Citizens Bank | 11304517 |
| Citizens Bank | 11401533 |
| Citizens Bank | 11601443 |
| Citizens Bank | 21372940 |
| Citizens Bank | 44015831 |
| Citizens Bank | 72402076 |
| Citizens Bank | 211070175 |
| Citizens Bank | 211170114 |
| Citizens Bank | 211574613 |
| Citizens Bank | 231373069 |
| Citizens Bank | 236074619 |
| Customers Bank | 67092886 |
| Evolve Bank and Trust | 84106768 |
| First Century Bank, Payoneer | 61120084 |
| Flagstar Bank | 272471852 |
| GE Money Bank | 124085024 |
| GoBank Division of Green Dot Bank | 124303162 |
| Green Dot Bank (Pasadena) | 124085024 |
| Green Dot Bank (Provo) | 124302529 |
| Green Dot Bank, (Bonneville Bank) | 124303120 |
| Green Dot Bank, (Synovus) | 61120000 |
| Marcus by Goldman Sachs | 124085260 |
| MetaBank (Memphis) | 84003997 |
| MetaBank (Sioux Falls, SD) | 73972181 |
| Metropolitan Commercial Bank | 62202985 |
| Metropolitan Commercial Bank | 26014902 |
| RushCard (JPM Chase) | 21409169 |
| UMB, NA | 101205681 |
| Vystar Credit Union | 263079276 |