Debt Payoff Planner (Snowball vs. Avalanche)

📈 Snowball vs. Avalanche: Which to Choose?

The choice between the Debt Snowball and Debt Avalanche is a debate between psychology and math. The **Debt Avalanche** method is mathematically optimal because placing extra cash on your highest-interest debt first minimizes interest accumulation. This saves you the maximum amount of money and is the rational choice if you are disciplined. However, the **Debt Snowball** method (knocking out the smallest balance first) is popular because of behavior modification. Clearing a credit card balance entirely gives you a quick victory, reducing stress and boosting motivation to continue. Pick the plan you are most likely to follow consistently.

The role of minimum payments and budget surplus

No matter which payoff strategy you choose, you must pay the minimum monthly payment on every debt to avoid late penalties and credit score destruction. The strategy only dictates where you direct your **budget surplus** (the leftover money you allocate to debt payoff beyond the minimum requirements). This calculator aggregates all minimum payments, deducts them from your monthly budget, and applies the remaining surplus to your target debt. As soon as a debt is cleared, its minimum payment is "rolled over" to the next debt in line, compounding the acceleration effect.

⚠️ Common Mistakes to Avoid

• Not paying minimums on all debts: Regardless of strategy, you must pay the minimum monthly payment on every debt to avoid late fees and credit damage.
• Ignoring emotional motivation: The Snowball method is mathematically less efficient but provides early psychological wins that keep people motivated.
• Failing to establish a small emergency fund: Before aggressively paying off debt, save a small starter fund (e.g., $1,000) to avoid taking on new debt for unexpected expenses.