Remember to update your IRD CS Estimate of Income
All non-custodial parents who are paying IRD [Spousal and] Child Support should think through whether they should submit a new Estimate of Income, before the 31st March.
If you haven’t submitted an Estimate and your income has reduced, you might end up paying quite a bit more CS than is set by the formula. This is a bigger risk, if you are self employed.
As it is late in the year, you should visit an IRD office in person, taking two copies with you. Ask the receptionist to date stamp and initial the copy that you take away with you. (This is important to give you an item of evidence, just in case IRD feel that they might have forgotten receiving your Estimate of Income.)
(I am not fully up to date in this area, so if my advice is out of date please correct me quickly!
If you have any concerns, discuss these issues through with someone knowledgeable, but don’t delay.