I pay a mutually agreed amount in child maintenance to my ex-wife for our 8 yr old daughter. My ex has started co-habitating with a new partner and they intend to marry. The new partners income is considerably higher than mine. My question is am I expected to still pay the agreed amount now that she is in a much stronger financial position than me? Thanks.
Not knowing what you agreed it''s difficult to say.
If your ex were to pursue child maintenance through the CSA you would be expected to contribute a percentage of your income until your daughter was no longer a dependant no matter what her financial circumstances.
The short answer is yes - this is because maintaining a child financially is the responsibility of the parents, not new partners or step-parents. If you are struggling to continue paying the mutually agreed amount, I suggest you use the CSA calculator to give you an indication of what that rate would be (15% of your net income, not allowing for any variations you may be entitled to).
child maintenance payable via the CSA would still be payable as it is based on your income not on your ex wifes financial situation.
Have you checked if the agreed amount is in line with what you would pay via the CSA. If you are paying more you could reduce payments to the CSA level. They have a calculator on their website that you can use to check.