Pre-commit a raise before you touch it

Direct a fixed percentage of any income increase to savings before it hits your spending account.

Why it works

Lifestyle creep happens automatically when new income enters spending-accessible accounts and the new level quickly becomes the reference point. Pre-committing the increase — ideally through automatic redirection before the paycheck lands — means the higher income never becomes the new spending baseline. The lever is that hedonic adaptation adapts to the level of income that reaches discretionary spending, not to gross income.

How to do it

1. When a raise or bonus is confirmed, immediately set a new automatic transfer to savings or investment accounts for at least half the after-tax increase.
2. Redirect the transfer before the first paycheck at the new rate arrives so the spending account never sees the difference.
3. Allow a pre-defined, modest increase in discretionary spending (e.g. 20% of the raise) to enjoy the gain without consuming it all.

Evidence

The Save More Tomorrow (SMarT) research found that pre-committing future income increases — specifically, allocating raises to savings before they were received — reliably increased savings rates with minimal resistance because current consumption wasn’t reduced. (rct)

The original studies were in 401(k) workplace settings; the principle applies broadly, but friction varies by account type and employer system.

Sources

• Thaler & Benartzi (2004), "Save More Tomorrow," Journal of Political Economy

Common mistake

Planning to save "more" after the raise arrives and then deciding what to save from what’s left — the spending baseline adjusts instantly and nothing is left.