{"id":"F2025L00657","name":"Family Law (Superannuation) (Interest Rate for Adjustment Period) Determination 2025","slug":"family-law-superannuation-interest-rate-for-adjustment-period-determination-2025","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"in_force","isInForce":true,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":106444,"registerId":"commonwealth-F2025L00657-current","compilationNumber":null,"startDate":"2026-04-03","status":"InForce","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"Name of determination","content":"#### 1 Name of determination\n\n  This determination is the Family Law (Superannuation) (Interest Rate for Adjustment Period) Determination 2025.","sortOrder":0},{"sectionNumber":"2","sectionType":"section","heading":"Commencement","content":"#### 2 Commencement\n\n  This determination commences on 1 July 2025.","sortOrder":1},{"sectionNumber":"3","sectionType":"section","heading":"Authority","content":"#### 3 Authority\n\n  This determination is made under section 76 of the Family Law (Superannuation) Regulations 2025.","sortOrder":2},{"sectionNumber":"4","sectionType":"section","heading":"Definition","content":"#### 4 Definition\n\n  In this determination:\n\n> regulations means the Family Law (Superannuation) Regulations 2025.","sortOrder":3},{"sectionNumber":"5","sectionType":"section","heading":"Adjustment period—financial year","content":"#### 5 Adjustment period—financial year\n\n  For paragraph 76(4)(a) of the regulations, the interest rate for the adjustment period, being the financial year beginning on 1 July 2025, is 0.069.","sortOrder":4},{"sectionNumber":"6","sectionType":"section","heading":"Adjustment period—less than 12 months within financial year","content":"#### 6 Adjustment period—less than 12 months within financial year\n\n  (1) This section applies to an adjustment period of less than 12 months that begins and ends in the financial year beginning on 1 July 2025.\n  (2) For paragraph 76(4)(b) of the regulations, the method for working out the interest rate for the adjustment period is by using the formula:\n  ![Start formula 1.069 superscript start fraction d over 365 end fraction end superscript minus 1 end formula](image.002.png)\n  where:\n\n> d is the number of days in the adjustment period.","sortOrder":5},{"sectionNumber":"7","sectionType":"section","heading":"Adjustment period—12 months not within financial year","content":"#### 7 Adjustment period—12 months not within financial year\n\n  (1) This section applies to an adjustment period of 12 months that begins in the financial year beginning on 1 July 2024 and ends in the financial year beginning on 1 July 2025.\n  (2) For paragraph 76(4)(c) of the regulations, the method for working out the interest rate for the adjustment period is by using the formula:\n  ![Start formula 1.068 superscript start fraction d1 over d1 plus d2 end fraction end superscript times 1.069 superscript start fraction d2 over d1 plus d2 end fraction end superscript minus 1 end formula](image.003.png)\n  where:\n\n> d1 is the number of days in the adjustment period in the financial year beginning on 1 July 2024.\n\n> d2 is the number of days in the adjustment period in the financial year beginning on 1 July 2025.","sortOrder":6},{"sectionNumber":"8","sectionType":"section","heading":"Adjustment period—less than 12 months not within financial year","content":"#### 8 Adjustment period—less than 12 months not within financial year\n\n  (1) This section applies to an adjustment period of less than 12 months that begins in the financial year beginning on 1 July 2024 and ends in the financial year beginning on 1 July 2025.\n  (2) For paragraph 76(4)(c) of the regulations, the method for working out the interest rate for the adjustment period is by using the formula:\n  ![Start formula 1.068 superscript start fraction d1 over 365 end fraction end superscript times 1.069 superscript start fraction d2 over 365 end fraction end superscript minus 1 end formula](image.004.png)\n  where:\n\n> d1 is the number of days in the adjustment period in the financial year beginning on 1 July 2024.\n\n> d2 is the number of days in the adjustment period in the financial year beginning on 1 July 2025.","sortOrder":7}],"analysis":{"flash_summary_failed":{"failed":true,"reason":"Unauthenticated. Configure AI_GATEWAY_API_KEY or use a provider module. Learn more: https://ai-sdk.dev/unauthenticated-ai-gateway","source":"analysis-cron"},"kimi_summary":{"content_quality":"ok","complexity_score":4,"scope_assessment":{"changed":false,"description":"This determination performs exactly its intended function: setting the annual interest rate for superannuation splitting adjustments. The four scenarios (full year, part-year within year, full year straddling years, part-year straddling years) represent the complete logical coverage required by the enabling regulations. No scope creep is evident."},"complexity_factors":["Mathematical formulas requiring compound interest calculations across three scenarios","Cross-referencing to Family Law (Superannuation) Regulations 2025 section 76(4)","Temporal conditional logic — four distinct scenarios based on period length and financial year boundaries","Blended rate calculations requiring day-counting across financial year boundaries","Technical superannuation/family law terminology ('adjustment period', 'payment split', 'non-member spouse') assumed but not defined"],"plain_english_summary":"This instrument fixes the interest rate at 6.9% (0.069) for calculating adjustments when superannuation is split after a relationship breakdown in the 2025–26 year. It affects separating couples, family lawyers and super funds, and determines how much the delayed payout is increased—so higher rates raise the compensation owed to the non-member spouse."},"flash_summary":{"complexity_score":3,"scope_assessment":{"changed":false,"description":"This determination does not change who is covered by the family law superannuation rules. It implements the existing power in the Regulations to set the interest rate and methods for calculating it (section 3) by prescribing a numeric rate for 2025–26 and formulae for various adjustment‑period scenarios (sections 5–8)."},"complexity_factors":["Single headline rate specified for the full financial year (section 5) reduces discretionary interpretation but fixes a numeric input implementers must use.","Different calculation methods depending on the type and timing of the adjustment period — separate formulas for (a) periods shorter than 12 months within the 2025–26 year, (b) 12‑month periods spanning two financial years, and (c) shorter periods spanning two financial years (sections 6–8).","Cross‑year weighting where an adjustment period spans two financial years requires counting days in each year and applying exponentiation with d1/(d1+d2) and d2/(d1+d2) weights (section 7).","Day‑count accuracy is required (d, d1, d2) to compute exponents and final rate, creating potential rounding and implementation issues for administrators (sections 6–8).","Instrument is procedural and delegated — made under regulation power (section 3) and relies on definitions in the regulations (section 4), so implementers must link this determination to the parent regulations.","Commencement is fixed (section 2), so systems must be updated by 1 July 2025 to apply the new rate and formulas."],"plain_english_summary":"Sets the interest rate and the mathematical methods used to calculate interest on family-law superannuation adjustment periods for the 2025–26 financial year, commencing 1 July 2025. It affects people who divide superannuation under family law, superannuation administrators and courts or registrars who must apply the rate. This matters because the prescribed rate and formulas determine the interest added to or deducted from split entitlements; some adjustment periods require pro rata day-count calculations across financial years, creating a small calculation and compliance burden."}},"importantCases":[],"_links":{"self":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025","history":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025/history","analysis":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025/analysis","conflicts":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025/conflicts","importantCases":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025/important-cases","documents":"/api/acts/family-law-superannuation-interest-rate-for-adjustment-period-determination-2025/documents"}}