Kelly Clarkson Has to Pay Ex-Hubby $200k/Mo. in Spousal & Child Support

Kelly Clarkson will be coughing up almost a quarter of a million dollars every 30 days to her ex-husband in the fallout of their divorce, at least for now ... TMZ has learned.

The judge in her divorce recently signed off on docs formalizing the temporary spousal and child support Kelly will pay Brandon Blackstock -- it's nearly $200k/mo. according to the docs. We're told the ruling actually happened in April, and it merely formalized what Kelly had already been paying her ex since she filed for divorce last June.

According to the docs, Brandon will get $150k in spousal support and $45,601 for their 2 kids. Hard to think of that huge amount as a discount for Kelly, however ... Brandon had requested $436k per month. So, with that in mind, it's a bit of a win for KC.

She does also have to fork over a one-time $1.25 million payment to cover Brandon's attorney fees.

Once the divorce is settled, we're told Brandon will only get 2 more years of spousal support, based on the length of their marriage. The unresolved issue is their prenup. If the judge determines it's valid, all those support numbers go out the window, and Brandon will get whatever is spelled out in the prenup.

Kelly was also awarded primary custody of their children -- 6-year-old River and 4-year-old Remy -- a little while back.