When you subscribe to a monthly plan, you will be charged $49.98 at the time of your purchase- assuming your business is approved by Tresle admin. After that, you will be automatically charged a renewal fee of $49.98 at the beginning of each additional month until the listing is canceled.
When you subscribe to a quarterly or semiannual plan, you will be billed a one-time payment at the cost of your selected plan. After that, you will automatically be charged at the beginning of each period (in this case 3 or 6 months) until the listing is canceled.