Master merchant accounts, or aggregation merchant accounts are where you get a merchant account and have multiple MIDs (Merchant ID numbers) that you can assign to other businesses to let them accept credit cards. It’s a high volume account and the hardest to qualify for. To qualify for a master merchant account you usually have to show that you’re currently processing for at least the amount you’re applying for to be considered for one. Volume is typically accepted at a few hundred thousand per month minimum. (more…)