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Expense Strategy in Retirement: Practical Modelling Guide

How retirement spending typically evolves, what can go wrong in assumptions, and how to use the expense strategies available in RetireMe.

Last reviewed: 13 Feb 2026 (NZT)

1) Why expense strategy matters more than most users expect

Return assumptions matter, but spending assumptions often dominate plan sustainability. Small changes in annual expenses compound over decades. [1][2]

  • Underestimating early retirement lifestyle costs causes optimistic short-run forecasts.
  • Ignoring late-life healthcare/care costs hides tail risk.
  • Assuming one flat spending line for 30+ years is usually unrealistic.

2) What spending often does in retirement

Many households experience a "go-go, slow-go, no-go" profile: higher discretionary spend early, moderation in mid-retirement, then healthcare and support costs rising later. [2][3]

  • Early years: travel, hobbies, home upgrades can keep spending elevated.
  • Middle years: discretionary categories often ease.
  • Later years: healthcare and support services can increase total spend again.

3) Expense strategy options in RetireMe

RetireMe supports three retirement expense modes:

  • Recommended: applies an age/lifecycle-informed curve from your base retirement expense.
  • Lifestyle Profile: uses preset lifestyle intensity (`frugal`, `typical`, `very-active`) to scale the curve.
  • Manual: lets you define your own custom lifestyle and care overlays.

Care Overlay

Care overlay is modelled separately from base lifestyle spending. This improves realism for late-life support costs and allows scenario testing for care funding strategy.

4) Related controls that change results

  • Base Retirement Expense: your anchor value; all curves build from this.
  • CPI Inflation: affects real-vs-nominal spending projection path.
  • Care Funding Strategy: self-funded vs public-RCS vs private-insurance scenarios.
  • Pre-retirement match-income behavior: can shape transition into retirement and early drawdown.

5) A robust workflow for users

  • Start with Recommended to get a baseline path.
  • Then run a Lifestyle Profile scenario (frugal vs very-active).
  • Add a stress scenario with care overlay enabled.
  • Compare outcomes across versions and note changes in liquid net worth durability.
  • Document assumptions so future updates are intentional, not accidental.

Best practice is not one "correct" number; it is a range with explicit downside and policy assumptions.

6) References

  • [1] Retirement Commission (Sorted) — Retirement budgeting guidance: sorted.org.nz
  • [2] Academic literature on retirement spending pathways (go-go/slow-go/no-go and retirement spending smile).
  • [3] Stats NZ — Household expenditure and age cohort spending data.
  • [4] Reserve Bank of New Zealand — Inflation and monetary context: rbnz.govt.nz
  • [5] Work and Income — NZ Super and care-related policy pages: workandincome.govt.nz
  • [6] Te Whatu Ora / Ministry of Health — Older persons' health service context.
  • [7] Inland Revenue — Tax code and pension tax treatment context: ird.govt.nz

Important disclaimer

This article is general educational information, not personalised advice. Use licensed advice for personal planning decisions.