Donate Child Support Calculator
Skip navigation

Calculators - Child support calculators, Family Law Web Guides website and CSA website

Add Topic
I have used both calculators, both CSA and the advanced Family Law one, and the difference is around $100 less on your advanced calculator, same information was used on both.
We have another child on the way to add into calculations, and yours comes out $70 less, again, than CSA calculator. We are waiting for the CSA to get back to us in regards to a breakdown of their 'workings out'.
Would be great if the CSA used your calculator…

OBCH, that is quite a difference, therefore I'd be pretty confident it's not a rounding issue. One area where calculations may not be truly reflected is the calculator is used when a child turns 13, in such a case you would have to run two scenarios and divide each result by 365 (I think, if I recall correctly, the divisor is in fact 365.25) and then multiply this by the number of days, in the child support period, that the child is the corresponding age.

With a $70-$100 discrepancy, my first look would be at the year which should be the same as the year in which the assessment starts.

Which of the two calculators did you use. I would recommend the advanced (this, if the Show Details checkbox is ticked, shows many of the intermediates values).

Did you try to crosscheck results against the CSA's Estimator?

calculators - Child support calculators, Family Law Web Guides website and CSA website

Thanks for your reply Mike T,
All children are under 13.
3 children from previous relationship, 1 child in new relationship
2009 year used in advanced calculator. Can't put a year in CSA calculator.
All information the same in both calculators.
Advanced calc - $713.50/m…$164/w
CSA calc ——- $802.00/m…$184/w

The difference is quite a lot, of course the CSA goes on theirs, do they have access to yours, can we ask them to use the advanced…???

        thanks for providing the information you have. I believe that the issue may be what is being input. The advanced calculator, as you should have seen, doesn't ask a lot of questions, such as children of other relationships and whether there are other cases, rather it relies upon what parents are given to automatically determine this. Having run scenarios I believe that the discrepancy may well be due to this aspect.

If a I run a scenario (3 CS children and 1 relevant dependant) that comes to $802 per month and then change the RDC to be a multi-case child (more about this later) then the CS becomes 715.50.

For an RDC child, that child should only have 1 parent all other adults should be "Other", if another parent is specified then that child is then a CS child.

For what I understand your scenario to be you should have the following (I believe that you had three adults and the 4th child having two parents, one different from the other 3 children):-

2 Adults only.
4 Children, the first 3 with both adults as parents (i.e. they are then seen as CS children. Note that a non-parent carer can also be be involved with 1 or 2 adults to indicate a CS child.)

The last child (not that it has to be last) has ONLY the one parent (yourself) the other parent is OTHER.

(P.S. you could have a third adult and have ALL relationships as other).

What I suspect that you have done (or perhaps that hasn't been explained clearly enough) is to add your current partner as a parent to the last child. The result is that this relationship is then considered not an ongoing one and that the child is therefore a CS parent and as such that it is a multi-case scenario (i.e. if you look through the results it will show that there are 2 cases not just the one).

I hope this makes sense.

I'll try to express the rules :-

If a child has two parents (parent abroad and deceased parents are parents, however they are dealt with specially if a non-parent-carer is involved), or one or more parents and one or more non-parent carer's, then that child is a CS child and will belong to a CS case.
If a child has only one parent specified and all other relationships are OTHER, then that child is a relevant dependant child (note that parent covers an adopted child).
Children will belong to the same CS case if the parents, are the same and the relationships constitute a case, if not and the criteria for the child being in a case are met, then they will belong to another case.

P.S. I found that the Advanced Calculator and the CSA's estimator do match (for the Case with an RDC, the Estimator cannot do multi-case scenarios).

Again I hope this makes sense. Oh and I believe that $802 is likely the correct figure.

Oh and I do believe that there are some people in the CSA who see the advantage of the advanced calculator and use it. It's perhaps an area that we should insist that the CSA come up with a sound reason for not using what is a simpler to use and more comprehensive tool.

Calculators - Child support calculators, Family Law Web Guides website and CSA website

Thanks Mike T,

Wow, you know your stuff…I understood barely then re-read and understand perfectly.

And changed 4th child, other parent to 'OTHER', which makes sense, now.

Thank you for the clarification, and I'm glad CSA is correct, not always the case!

We are still waiting for our reply from our CS objection…

Hoping our outcome will be favourable, however after reading SSAT forum, sounds unlikely.

Will keep you posted.

Guest said
Yes this 2009 year used in advanced calculator, it just can't put a year in CSA calculator. That would be a big thing to think for.  

I'm not that sure what you're saying guest. However if you're saying that you can't specify the year in the CSA Calculator (the non-advanced one on here), then that one is designed to display amounts for each year. However there is no intention to change that calculator other than to perhaps drop it's use.

Basically it was designed based upon an incomplete understanding of the legislation and it became clear that the principles behind it's design could not be extended to cater for the complexities of multi-case scenarios or for some of the non-parent carer scenarios such as when a parent is abroad or is deceased as in these situations different calculations methods apply. Likewise the standard calculator could not cope with the distribution of payments when those payments are spread amongst multiple recipients. I believe that the CSA's estimator is also limited in the same way.

Guest said
And about the Advanced Calculator and the CSA's estimator have match for the Case with an RDC, the Estimator cannot do multi-case scenarios. Then that would be a great one.

As above, the limitations of the CSA's estimator, appears to be very much along the lines of the limitations of the standard/basic calculator. I believe many in the CSA are limited to using the estimator or otherwise have to resort to either passing such a calculation on to a technical support officer or trying to do it manually based upon the procedural instructions. However I do believe that the CSA do have another calculator available but it appears that it's existence is something that isn't advertised internally.

I'm unsure why you have posted the link that you have. Very extensive testing of the advanced calculator has already been undertaken. Perhaps one of the most telling was with a real complex case. The calculations were slightly out, however it was then realised that the assessment start date was in the previous year as when the new legislation came into effect assessments were amended rather than being started with a new assessment, changing the year resulted in a match with the actual assessment. Also there was never actually any conversion done (knowingly anyway), the estimator and the basic and advanced calculators were developed independently (although some of the changes made to the estimator did appear to reflect some of the features that were originally provided exclusively by the advanced calculator), except that some of the core code, such as the cost of children calculation function was carried forward from the basic to the advanced calculator.
1 guest and 0 members have just viewed this.

Recent Tweets