Automate the extra payment on the target debt the day after payday

Schedule the extra avalanche payment as an automatic transfer so the decision is made once, not every month.

Why it works

Willpower depletion and decision fatigue mean that recurring optional decisions — "how much should I send to this debt this month?" — are reliably made worse over time than a single pre-committed decision. Automating the extra payment converts a monthly willpower expenditure into a single setup decision. The "day after payday" timing ensures the transfer occurs before discretionary spending absorbs the funds.

How to do it

1. Set up a recurring automatic transfer from your checking account to the target debt, timed for the day after each payday.
2. Set the amount to your realistic monthly extra — the amount you calculated will go to debt after minimum payments.
3. Review and update the automation after each payoff event (the freed-up minimum from the completed debt should be added).
4. Do not cancel the automation when the month feels tight; instead, adjust it deliberately and consciously.

Evidence

Automation of savings and debt repayment is associated with substantially higher adherence than intention-based approaches; behavioral research on default enrollment (Thaler & Benartzi, 2004) finds that making the desired behavior the automatic default dramatically increases follow-through. (rct)

Thaler & Benartzi studied automatic savings enrollment in retirement plans; the same automation principle applies to debt repayment but the specific effect size in that context has not been isolated in an RCT.

Sources

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

Common mistake

Setting the automated amount too high, which causes the payment to fail or creates cash-flow stress that motivates canceling the automation entirely — start with a realistic amount and automate, rather than an aspirational amount that cannot be sustained.