In the Name of Allah, The Most Gracious, Most Merciful

If all businessmen paid their Zakat in Ramadan, what is left to the poor the rest of the year?

I want to address our brothers who work in trade. If you pay your Zakat in full on the first day of Shawwal for example, write down the Zakat for the coming year, given you have 365 days during which you can choose the cases you find worthy of your Zakat, like a relative who needs a surgery for real, and you know that he is honest.
Hence, through the entire coming year you have the time to find the cases you want to support by your Zakat.

Praise be to Allah, the Lord of Creations