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
- Set up a recurring automatic transfer from your checking account to the target debt, timed for the day after each payday.
- Set the amount to your realistic monthly extra — the amount you calculated will go to debt after minimum payments.
- Review and update the automation after each payoff event (the freed-up minimum from the completed debt should be added).
- 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.
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More practices for The Debt Avalanche, Made Practical
- List all debts ranked by interest rate, highest to lowest
Sort every debt by APR descending — this single ordering is the entire strategic decision of the avalanche method.
- Calculate the concrete dollar saving of avalanche versus snowball for your debts
Run both methods through a calculator with your actual numbers — knowing the saving in dollars makes the avalanche’s discipline worth it.
- Build a motivation scaffold for the long stretch before the first payoff
Create interim milestones — balance reductions, interest-saved totals, percentage paid — so the first elimination event is not the only win.
- Guard against the "one more purchase" exception
The avalanche fails when every large optional purchase becomes an exception to the debt freeze — pre-commit to what qualifies as an exception.
- Audit interest rates for refinance or transfer opportunities before choosing an order
Before locking the avalanche sequence, check whether any high-rate debt can be refinanced or transferred to a lower rate — this changes the optimal order.