All you need to do is file for an order modification, in the court that has jurisdiction of the case, for a reduction in support. Once a hearing is scheduled you can state your case. I would suggest however that you have an attorney to advise you on whether the median income rule will apply.

While your income level has changed as with most Americans, you may communicate with your former spouse regarding the pay of a lower amount of child support. I would recommend going that avenue first prior to petitioning for anything as the costs may be substantive. With the rising costs of college, everyday items, and interest rates you may want to reconsider the decision in wanting to pay less child support.

If the spouse agrees to a reduction and it is not court approved, the father will be in arrears if she changes her mind down the road. Support is court ordered and ONLY a judge can change it, not a parent, not a relative.

Is your retirement mandatory? If it is not, you're in effect voluntarily reducing your income, and the court may not agree to lower your support because you opted to not continue working when you know what your financial obligation to your children is.

The median figure might be used for those who flat out don't work or hide their income, Unfortunately, your situation is not the same at all. You've got a good job and are choosing to stop working, and your pension income will be treated the same as any other income, rental income, investment income, royalties, etc. Income calculations for support don't need to be from only work when calculating support. Even a billionaire that plays all day while paying others to manage his assets still pays support, after all.

Good luck.