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Public vs Private Surgery Calculator

Compare the financial cost of waiting for public elective surgery vs paying for private. Factors in productivity loss and 5-year health insurance premiums.

By Konstantin IakovlevPublished 28 March 2026Last reviewed
Data stays on your deviceVerified formula

About this calculator

This calculator implements NZ elective surgery wait times + private cost estimates from Te Whatu Ora + Policywise. Last consulted 18 May 2026. Verify the figures yourself by following the link.

NZ elective surgery costs & wait times

Te Whatu Ora Jan 2025 + Policywise 2026
  • Hip replacement private: ~$28,000
  • Knee replacement private: ~$26,500
  • Cataract (one eye) private: ~$4,800
  • Public wait >4 months (Jan 2025): 37,000+ patients
  • Typical hip wait public: 6-18 months
  • Health insurance premium (45yo couple): ~$300-450/mo

Source: Te Whatu Ora — Wait times

Disclaimer

This calculator provides estimates for general information purposes only. Results are based on standard formulas and may not reflect your individual circumstances. Always consult a qualified professional for advice specific to your situation.

How public vs private surgery cost compares

Net financial cost = (private upfront cost) vs (productivity loss during public wait + insurance premiums).

  1. 1

    Private upfront cost

    Private = procedure_cost (hip ~$28k, knee ~$26k, cataract ~$4.8k)

    Out-of-pocket or via health insurance.

  2. 2

    Public wait cost

    Public_cost = monthly_income × productivity_loss_% × wait_months

    Lost productivity (e.g. 30%) for the wait period.

  3. 3

    Insurance premium cost

    Insurance = monthly_premium × 60 (5-year amortised)

    Compare 5-year premium total to one-off private cost.

  4. 4

    Decision rule

    Go_private if public_cost > private_cost

    Plus quality-of-life considerations (not in formula).

Worked example

Inputs: Hip private $28k, public wait 12mo, $6k/mo income, 30% productivity loss

Result: Public cost = $6,000 × 30% × 12 = $21,600. Private = $28,000. Public ($21.6k) < Private ($28k) — wait it out.

Frequently Asked Questions

How long are NZ public elective surgery waits?
As of January 2025, 37,000+ NZers were waiting >4 months for elective surgery (Te Whatu Ora data). Wait times vary by procedure: hip/knee replacements often 6-18 months; cataract surgery 6-12 months; bariatric surgery 12-36 months. Acute (life-threatening) surgery is fast — usually within days. Source: Te Whatu Ora.
When is health insurance worth it in NZ?
Health insurance starts making sense when (1) you have a family income relying on you, (2) you have known health risks, (3) you can afford ~$1,500-$3,000/year for individual or $4-8k for family cover. Pre-existing conditions are usually excluded — sign up while healthy. Major providers: Southern Cross (largest), nib, AA Health, Accuro, Partners Life. Source: Consumer NZ.
Which conditions are NOT covered by NZ public health?
NZ's public health system (Te Whatu Ora) covers most acute and major elective care free, but excludes: (1) Most dental beyond age 18 (children's dental is free), (2) optical and vision aids (except for serious eye disease), (3) cosmetic procedures, (4) IVF beyond 2 free cycles for eligible couples, (5) most physiotherapy except via ACC for injuries, (6) bariatric (weight-loss) surgery in most DHB regions, (7) gender-affirming surgery (long waitlists, limited access), (8) most allied health (psychology, nutrition, podiatry) unless via GP referral. Private health insurance typically covers most of these. Source: Te Whatu Ora + Manatū Hauora.
Are pre-existing conditions ever covered by NZ health insurance?
Standard policies exclude pre-existing conditions permanently, but most major NZ insurers offer pathways: (1) Time-based clearance — after 3-5 years symptom-free, condition becomes covered (varies by insurer); (2) Underwritten loading — insurer accepts coverage but charges +30-100% premium; (3) Group/employer schemes — Southern Cross UltraCare and similar offer no medical underwriting, so pre-existing conditions are covered after 6-12 months; (4) Disclose-and-cover — some insurers cover specific conditions with conditions attached. Always disclose fully when applying. Non-disclosure void the policy. Major NZ providers: Southern Cross, nib, AA Health, Accuro, Partners Life. Source: Consumer NZ Health Insurance review.

How this calculator works

This public vs private surgery calculator uses the latest data from official New Zealand government sources to provide accurate results. All calculations are performed in your browser — your data never leaves your device.

All calculations are performed in your browser — your data never leaves your device. Results are for general guidance only and should not be considered professional financial advice.

Built and maintained by Konstantin Iakovlev. Data sourced from the IRD and official New Zealand government sources.

Last reviewed: