How People Respond to Fixed vs Flexible Saving

People overwhelmingly prefer flexible arrangements when asked in advance, expecting to save more in good months and less in bad ones. In practice the good-month increase rarely materialises while the bad-month reduction reliably does.

A fixed schedule converts saving from a repeated choice into a standing arrangement. Ashraf, Karlan and Yin's Philippines field experiment found that a commitment savings product substantially increased balances relative to a standard account offered to the same population.

Commitment is not free. Rigid arrangements can force costly borrowing when circumstances change, which is why commitment should apply to the schedule and the amount, not to access.

Fix the contribution and the schedule; keep withdrawal open. This preserves the behavioural benefit of a default while removing the trap risk — the arrangement is a commitment against forgetfulness, not against yourself.

Choose a fixed amount below your threshold and leave it alone. If circumstances change, reduce it deliberately rather than skipping ad hoc — a reduced fixed schedule survives; an irregular one does not.

A Pod fixes the amount and schedule while leaving withdrawal available at any time, with a 3% withdrawal fee capped at $20 maximum. No subscriptions, no upfront fees, and you can quit anytime.

• Stated preference favours flexibility; results favour fixed.
• Flexible schedules reintroduce a decision every period.
• Commit the schedule, not your access to the money.
• Reduce deliberately rather than skipping ad hoc.

• Ashraf, N., Karlan, D. & Yin, W. — Tying Odysseus to the Mast: Evidence from a Commitment Savings Product in the Philippines (2006)
• Thaler, R. H. & Benartzi, S. — Save More Tomorrow (2004)