Your sinking funds for debt payoff are not fixed and can be adjusted as your situation changes, such as your income, expenses, or debt balances. For instance, if you receive a windfall, such as a bonus, tax refund, or gift, you can use some or all of it to boost your sinking funds and pay off your debt faster. On the other hand, if you have an unexpected expense, such as a medical bill, car repair, or home improvement, you can use some of your sinking funds to cover it, but make sure to replenish them as soon as possible. Additionally, if you pay off one of your debts, you can use the money that you were saving for that debt to increase your savings for your other debts, or to save for a different goal. Lastly, if you have a change in your income or expenses, you can review your budget and your sinking funds, and adjust them accordingly.