# Episode 391: How Assumptions Shape Financial Planning Outcomes

Page: https://stenobird.com/podcast/the-rational-reminder-podcast-743537/episode-391-how-assumptions-shape-financial-planning-outcomes
Text version: https://stenobird.com/podcast/the-rational-reminder-podcast-743537/episode-391-how-assumptions-shape-financial-planning-outcomes.md
Podcast: [The Rational Reminder Podcast](https://stenobird.com/podcast/the-rational-reminder-podcast-743537)
Published: 2026-01-08T10:30:00+00:00
Episode link: https://rationalreminder.libsyn.com/episode-391-how-assumptions-shape-financial-planning-outcomes
Audio file: https://dts.podtrac.com/redirect.mp3/traffic.libsyn.com/secure/rationalreminder/RR_-_EP.391_-_AUDIO_V1.mp3?dest-id=763774
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JSON: https://stenobird.com/v1/public/podcasts/the-rational-reminder-podcast-743537/episodes/episode-391-how-assumptions-shape-financial-planning-outcomes
Duration seconds: 4539

## Resource

Financial planning is built on assumptions — about markets, inflation, longevity, human behaviour, and even the questions clients bring into the room. In this episode, Ben and Braden welcome a diverse panel that originally came together at the FP Canada Conference to explore how those assumptions influence planning outcomes in practice. Joining them are Adam Chapman, a retirement-focused planner who helps clients turn their money into memories; Joe Nunes, an actuary with decades of pension and longevity experience; and Aaron Theilade, Director of Continuing Education at FP Canada. Together, the panel unpacks how to make assumptions credible, how to stress-test them, how to navigate client bias, and how planners can blend math with humanity to create better client outcomes. Key Points From This Episode: (0:00:04) Why this episode: recreating a conference panel on planning assumptions. (0:01:03) Braden on the panel's value for planners and DIY investors. (0:02:32) Meet the guests: Adam, Joe, Aaron, and Braden. (0:06:04) Assumptions matter: directional accuracy > prediction. (0:07:47) Actuarial view: start with inflation, bond yields, and risk capacity. (0:09:38) Engineering mindset: plan for expected and unexpected outcomes. (0:13:21) Client pushback: longevity surprises and hidden assumptions. (0:16:59) Asset allocation: strategic, goal-based, informed by behaviour. (0:20:57) Software limits: life is too variable for perfect modeling. (0:22:01) Behaviour gap: retirees spend less over time despite inflation. (0:25:18) Software guides; planners interpret and humanize outputs. (0:28:48) Use assumptions based on the specific question (e.g., withdrawals). (0:30:31) Always ask: "Why are we modeling this?" (0:34:15) Handling bias: reframe assumptions to reveal inconsistencies.…

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