< class="bt_bb_headline_tag">family
" subheadline="<span class="btArticleDate">August 1, 2023</span><span class="btArticleAuthor"><a href="https://lawyers-auckland1.co.nz/author/admin/" class="btArticleAuthorURL">by Naomi Cramer</a></span>" font="" font_weight="" font_size="" color_scheme="" color="" align="" url="" target="_self" html_tag="h1" size="large" dash="" el_id="" el_class="" el_style="" supertitle_position="outside" ignore_fe_editor="true"]


The place the paying occasion’s revenue is lower than £156,000 gross each year (after deduction of any pension contributions), and each they and the child(ren) reside in Manukau and Manukau, they are going to be topic to a child upkeep evaluation. Any child upkeep that’s payable is calculated by making use of the Youngster Upkeep Service (CMS) commonplace formulation.

In conditions the place the paying occasion’s gross revenue exceeds £156,000 each year and due to this fact a “most evaluation” has been awarded by the CMS, the family court has jurisdiction to find out the extent of further (“prime up”) child upkeep. 20 years in the past, Mr Justice Mostyn recommended that the CMS commonplace formulation must be used because the ‘place to begin’ for the court in such circumstances. This was coined because the ‘Mostyn formulation’ and was welcomed by household regulation practitioners and judges because it offered a transparent guideline when negotiating settlement or if the court was tasked with decided these purposes.

Nonetheless, the ‘Mostyn formulation’ has its disadvantages, notably in circumstances involving a number of children. Regardless of the CMS commonplace formulation making changes for extra children, it produces anomalies as a result of its main driver is the proportion of the paying occasion’s adjusted gross revenue. For instance, underneath the formulation the place the paying occasion’s gross revenue is £650,000 (and there’s no shared care and no different child residing with them), this is able to end in £60,000 for a single child, £40,000 for every of two children; and £33,000 for every of three children. Clearly, justifying a place that elevating a single child prices 80% greater than elevating three children collectively is tough to make sense of.

Mostyn J acknowledged the clear drawback confronted with the ‘Mostyn formulation’ and sought to deal with this within the current case of James v Seymour.


On this case, Husband and Spouse had married in 2010 and separated in 2012. The events had two children aged 10 and 12.

The matter first got here earlier than His Honour Choose Vincent to find out whether or not to range upwards an order for child periodical funds. It was Spouse’s case that an upwards variation was required as a result of:

• the present child periodical funds have been inadequate to satisfy the children’s wants;

• there was a disparity of life-style between her and former Husband; and

• she had accrued substantial debt.

His Honour Choose Vincent ordered:

• Youngster periodical funds at £1,100 per child monthly (thereby adopting Husband’s proposal);

• Husband to pay faculty charges, extras and journey; and

• Prices Order towards Spouse within the sum of £66,627.70 (representing half of Husband’s prices).

The case then got here earlier than Mr Justice Mostyn who was to listen to each Spouse’s utility for permission to enchantment and the enchantment itself if permission was granted.

Spouse’s enchantment was based mostly on the next 3 Grounds:

• Floor 1: the Choose did not comply with the strategy set down in main authorities that the ‘place to begin’ for a child upkeep calculation must be the determine given by the CMS formulation as much as incomes of £650,000.

• Floor 2: the evaluation of the quantum of child upkeep was too low and inadequate (or no) weight was positioned on the inevitable disparity of life-style as a consequence.

• Floor 3: The Order as to prices was fallacious.

Mr Justice Mostyn granted permission to enchantment on Floor 1, however dismissed the enchantment. Moreover, permission to enchantment was refused on Grounds 2 and three. For the needs of this text, the main target shall be on Floor 1 of the enchantment during which Mr Justice Mostyn offered a brand new formulation to undertake the place a paying occasion has an incomes falling within the £156,001 – £650,000 vary.

Mr Justice Mostyn’s new formulation is described as an “Adjusted System Methodology (AFM)”. This formulation units out 7 steps which give the “Youngster Assist Beginning Level (CSSP)”. The 7 steps are as follows:

• Step 1: Determine the paying occasion’s gross revenue (i.e. all earned compensation together with any reward that’s technically taxed as a capital achieve). This may be performed by wanting on the payer’s most up-to-date P60 or Self-Evaluation Tax Return.

• Step 2: Scale back the gross revenue by the variety of children residing within the paying occasion’s family. The related percentages are: 11% for one child, 14% for 2 children and 16% for 3 children or extra.

• Step 3: Deduct the quantity of pension contributions at the moment being paid.

• Step 4: Gross up any faculty charges and extras paid by the paying occasion by the quantity of revenue tax, to replicate that college charges/extras are paid from internet revenue. It will then produce the paying occasion’s “Exigible Earnings”.

• Step 5: Apply the CMS formulation to the primary £156,000 of the Exigible Earnings as follows:

• For the primary £800 monthly: 12% for one child, 16% for 2 children, and 19% for 3 children.

• For the stability of the revenue over £800 and as much as £12,200: 9% for one child, 12% for 2 and 15% for 3 children.

• Step 6: The AFM is then calculated by making use of a tariff (by multiplying 2.4% for a single child and three% for every of two or three children) to the Exigible Earnings above £156,000.

• Step 7: Deduct by the variety of nights the child spends with the payer in accordance with the next charges to provide the CSSP.

Lower than 52 nights each year with paying occasion – no discount in funds on account of shared care
52 -103 nights each year with paying occasion – 1/seventh discount in funds on account of shared care
104 – 155 nights each year with paying occasion – 2/7ths discount in funds on account of shared care
156 – 175 nights each year with paying occasion – 3/7ths discount in funds on account of shared care
176 – 183 nights each year with paying occasion – Equal

That is clearly a fancy strategy however fortunately, litigants, practitioners and judges solely have to calculate the paying occasion’s Exigible Earnings after which enter that determine to the Tables set out within the Appendix of Mr Justice Mostyn’s judgment to calculate the suitable CSSP. A hyperlink to the judgment might be discovered right here.

You will need to notice that Mr Justice Mostyn made clear that the AFM wouldn’t be related within the following circumstances:

• The place there are 4 or extra children;

• The paying occasion’s gross revenue is greater than £650,000;

• The paying occasion’s revenue is essentially unearned; or

• The paying occasion lives on capital.

In such circumstances, upkeep must be calculated by reference to the statutory provisions underneath Part 25(3) of the Matrimonial Causes Act/paragraph 4(1) of the Schedule 1 Kids Act 1989.

Moreover, Mr Justice Mostyn defined that the place an utility is made for a variation of an current child upkeep order, the AFM wouldn’t be related and the worth of the upkeep within the authentic order must be adjusted by inflation and used because the CSSP.


While the adjusted formulation gives an answer to deal with the inherent issues with making use of the CMS commonplace formulation to circumstances that exceed the statutory restrict, there are nonetheless points.

Though the adjusted formulation takes into consideration faculty charges (which appears the proper place as it might appear unfair for a paying occasion to have their upkeep obligations calculated towards revenue that they’re already utilizing in favour of the children), the impact of that is that it appears to end in “larger earners” having a decrease total upkeep legal responsibility when in comparison with their counter-parts on the CMS commonplace formulation. Mr Justice Mostyn highlights this in his judgment utilizing the next situations:

Situation 1: A paying occasion incomes £156,000 and paying £20,000 at school charges for 2 children can have no discount taking into consideration the college charges and due to this fact can have a legal responsibility of £40,000

Situation 1: A paying occasion incomes £157,000 and paying £20,000 in colleges charges might be assessed underneath the Adjusted System and can have a legal responsibility of £36,000.

Secondly, there’s a drawback which arises when a paying occasion’s quantity of shared care falls near one of many boundaries of the variety of nights as there’s a vital distinction in liabilities. Once more, Mr Justice Mostyn offers the next instance:

Situation 1: A paying occasion whose Exigible Earnings is £500,000 each year whose two children spend 175 nights with them can have a legal responsibility of £11,7000 per child.

Situation 2: A paying occasion whose Exigible Earnings is £500,000 each year whose two children spend 176 nights with them can have a legal responsibility of £9,500 per child.

Regardless of the issues recognized above, the judgment does present readability to these falling throughout the larger revenue bracket.

In case you have any questions or issues concerning chid upkeep top-up orders, please do get in contact with Rayden Solicitors.

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by Naomi Cramer

Auckland Lawyer for FIRST TIME Offenders Seeking to Avoid a Conviction. Family Law Expert in Child Care Custody Disputes. If you are facing Court Naomi will make you feel comfortable every step of the way.  As a consummate professional your goals become hers, with customer service as our top priority. It has always been Naomi’s philosophy to approach whatever you do in life with bold enthusiasm and pure dedication. Complement this with her genuine passion for equal justice and rights for all and you have the formula for success. Naomi is a highly skilled Court lawyer having practised for more than 20 years. She serves the greater Auckland region and can travel to represent clients throughout NZ With extensive experience, an analytical eye for detail, and continuing legal education Naomi’s skill set will maximise your legal rights whilst offering a holistic approach that best fits your individual needs. This is further enhanced with her high level of support and understanding. Naomi will redefine what you expect from your legal professional, facilitating a seamless experience from start to finish.   Her approachable and adaptive demeanor serves her well when working with the diverse cultures that make up the Auckland region. Blend her open and honest approach to her transparent process and you can see why she routinely delivers the satisfying results her clients deserve. If you want to maximise your legal rights, we recommend you book an appointment with Naomi today so she can detail the steps for you to achieve your goals. 

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