| Business | Phone |
| Lemieux & Nolet Comptables 25 Boul Tache O, Montmagny G5V 2Z9 | (418) 248-1910 |
| Mallette 5 Boul Tache E #200, Montmagny G5V 1B6 | (418) 248-5777 |
| Raymond Chabot Grant Thornton 15 Av Saint-Magloire, Montmagny G5V 2W4 | (418) 248-1303 |
| Boulet, Yvon 3 Boul Tache E, Montmagny G5V 1B6 | (418) 248-9321 |
| Couillard, Marc Ca 26 Av Belanger, Montmagny G5V 2X3 | (418) 248-1637 |
| Dube, Michel 3 Boul Tache E, Montmagny G5V 1B6 | (418) 248-3270 |