KiwiSaver Medical Withdrawal Documents Checklist (2025 Guide)
Hülya Alkan · Dec 9, 2025 · Updated Oct 6, 2026
If you’re applying for a KiwiSaver withdrawal to help fund weight loss surgery — such as gastric sleeve, gastric bypass or mini bypass — your application will only move quickly if your documentation is complete and well-organised.
In 2025, KiwiSaver providers are more strict about documentation, especially for medical and financial hardship withdrawals. Missing even one document can delay your application by weeks.
This guide provides the exact checklist of what you need for a successful application, including:
-
Required documents (medical, financial, identity)
-
Optional documents that strengthen your case
-
Provider variations (Booster, Fisher Funds, Aurora, Milford, Simplicity, ANZ, AMP)
-
Tips to avoid delays
-
A downloadable-style checklist you can follow step-by-step
If you haven’t seen it yet, start with the full guide:
👉 KiwiSaver for Weight Loss Surgery (2025 Guide)
Regardless of provider, you will always need:
✔ 1. KiwiSaver Withdrawal Application Form
Download the version specific to your provider.
This form includes:
-
your personal details
-
purpose of withdrawal
-
statutory declarations
-
medical or hardship sections
-
document checklist
Tip: Do not leave any section blank — incomplete forms cause automatic delays.
✔ 2. Proof of Identification
Usually one of the following:
-
Passport
-
Driver licence
-
NZ birth certificate
-
Citizenship certificate
Some providers may require certified copies.
✔ 3. Proof of Address
Any of:
-
utility bill
-
bank statement
-
government letter
-
rental agreement
Must show your name + address.
KiwiSaver providers require evidence that surgery is medically necessary.
You will need:
✔ 4. GP Medical Letter (Required)
The most important document.
Must include:
-
Diagnosis
-
BMI + weight + height
-
Comorbidities
-
Treatment history
-
Why surgery is recommended
-
Why it should not be delayed
Use our template here:
👉 KiwiSaver GP Letter Template for 2025
✔ 5. Specialist Notes (If available)
Helpful but not mandatory.
Examples:
-
Bariatric surgeon consultation notes
-
Sleep study
-
Endocrinology reports
-
Diabetes metabolic reports
✔ 6. Medical History Summary (Optional but useful)
Often improves approval speed.
🟧 3. Surgery Documentation (Cost Evidence)
KiwiSaver providers require proof of the surgery's cost.
✔ 7. Formal Cost Estimate from Your Bariatric Clinic
Must include:
-
Surgery type (sleeve, bypass, mini-bypass)
-
Total cost (GST included)
-
Hospital + anaesthesia fees
-
Pre-op test fees
-
Clinic details
✔ 8. Invoice or Booking Confirmation (If applicable)
Especially useful for medical-only withdrawals.
🟩 4. Financial Documentation (Required for Hardship Applications)
If you are applying under significant financial hardship, you will need additional documents.
✔ 9. Last 3 Months of Bank Statements
For all accounts, including:
-
personal
-
joint
-
savings
-
credit card accounts (sometimes requested)
Statements must show:
-
income deposits
-
rent/mortgage payments
-
living costs
-
recurring bills
✔ 10. Income & Expense Breakdown
Providers often require a budget summary showing:
-
rent
-
utilities
-
food
-
transport
-
debt payments
-
child-related costs
✔ 11. Debt or Overdue Notices (If relevant)
Examples:
-
overdue bills
-
loan arrears
-
credit card overdue statements
✔ 12. Proof of Inability to Obtain Alternative Funding
May include:
-
loan decline letters
-
insurance exclusions
-
savings account balances
-
financial hardship letters
Some providers (e.g., Simplicity) ask for more detail.
⭐ Booster (Bariatric-friendly)
Typically requires:
-
GP letter
-
Cost estimate
-
Bank statements (if hardship)
-
ID + proof of address
Straightforward process.
⭐ Fisher Funds (Clear and structured)
Often requests:
-
GP letter
-
Detailed medical info
-
Clear cost breakdown
-
Full bank statements
Easy to work with if the documents are complete.
⭐ Aurora (Fast hardship decisions)
Requires:
-
GP letter (if medically relevant)
-
Bank statements
-
Expense breakdown
Simple and fast, especially for hardship.
Milford
Strict about:
-
financial documentation
-
discretionary spending explanations
But good with medical withdrawals if GP letter is detailed.
Simplicity
The strictest provider for hardship.
Often requires:
-
extended bank history
-
very detailed budgets
-
proof of loan declines
Be prepared for follow-up requests.
ANZ
Balanced and fair.
Requires:
-
detailed GP letter
-
cost estimate
-
financial disclosure (if hardship)
AMP
Accepting but thorough.
Expect follow-up questions.
Requires:
-
medical evidence
-
financial summary
-
income verification
These are not required but significantly increase approval chances:
✔ Personal Statement
Explains why surgery is essential and unaffordable without KiwiSaver.
✔ Weight-related diagnostic reports
e.g., sleep apnea, HbA1c, blood pressure logs.
✔ GP referrals from previous years
Shows consistent medical need.
✔ Mental health impact letter
If weight affects mental wellbeing or quality of life.
🟦 7. Full Downloadable-Style Checklist
Here is the complete checklist in one place:
IDENTITY
-
ID (passport or driver licence)
-
Proof of address
MEDICAL
-
GP letter (required)
-
Specialist notes (optional)
-
Medical history summary
-
BMI + comorbidity documentation
SURGERY DOCUMENTS
-
Formal cost estimate
-
Invoice or booking confirmation
FINANCIAL (Hardship only)
-
3 months of bank statements
-
Income & expense worksheet
-
Debt or overdue notices
-
Loan decline letters (if any)
-
Proof of inability to self-fund
FORMS
-
Provider-specific withdrawal form
-
Statutory declaration (if required)
🟧 8. Common Documentation Mistakes
❌ Missing GP letter
❌ No cost estimate
❌ Missing bank accounts
❌ Inconsistent financial information
❌ Submitting photos instead of PDFs
❌ Sending documents in multiple emails
❌ Not explaining discretionary spending
Pro tip: Send everything in one single PDF to speed up processing.
🔗 Need the full process start to finish?
Read the complete guide here:
👉 KiwiSaver for Weight Loss Surgery (2025 Guide)
Not sure if you have everything ready?
Take our 30-second eligibility check →
Thinking about your own journey?
Every patient comes to Turkey for a different reason. Tell us yours - your coordinator replies on WhatsApp.
