High-Interest Debt: What To Pay First

High-interest debt can make it harder to build savings and move toward other financial goals because a larger portion of your payments may go toward interest instead of reducing the balance.

If you have several debts, the most important question is usually not:

“Which debt bothers me the most?”

It is:

“Which debt is costing me the most, and which payment strategy can I realistically maintain?”

In many cases, paying the highest-interest debt first is the most efficient approach because it reduces the most expensive borrowing cost first.

But that does not mean every situation should be handled exactly the same way.

Quick Answer: Which High-Interest Debt Should You Pay First?

A practical approach is:

1. List every debt
2. Record the balance, interest rate, and required payment
3. Make at least the required payment on every debt
4. Build a small emergency buffer if you have no savings
5. Prioritize the highest-interest debt
6. Direct all available extra money toward that balance
7. Roll the old payment into the next-highest-rate debt
8. Reassess if interest rates or circumstances change

This is commonly called the debt avalanche method.

If your biggest challenge is motivation rather than interest cost, the debt snowball may still be worth considering.

What Counts as High-Interest Debt?

There is no universal cutoff that makes a debt “high interest.”

It depends partly on:

• The interest rate
• The type of debt
• Alternative borrowing costs
• Your overall financial situation
• How quickly the balance can realistically be repaid

Examples often include:

• Credit cards
• Certain personal loans
• Some lines of credit
• Payday or other very expensive short-term loans
• Retail financing after promotional rates expire
• Other unsecured consumer debt

A debt charging 20% interest is usually much more expensive to carry than a debt charging 5%.

That difference can have a major effect on how quickly your balance declines.

Why Interest Rate Matters

Interest is the cost of borrowing money.

If two debts have the same balance but different rates, the higher-rate debt generally costs more to carry.

For example:

Even though the balances are identical, Debt A is much more expensive.

That is why a highest-interest-first strategy usually prioritizes Debt A.

Step 1: List All Your Debts

Start by writing down every balance you owe.

For each debt, record:

• Lender or creditor
• Current balance
• Interest rate
• Required payment
• Due date
• Whether the rate is fixed or variable
• Any promotional rate
• When a promotional rate ends
• Any fees

For example:

Seeing everything together makes the repayment order much easier to understand.

Step 2: Make Required Payments on Every Debt

Do not stop paying lower-interest debts while focusing on the highest-rate balance.

Continue making at least the required payment on every account.

Then direct your extra repayment money toward the debt you have chosen to prioritize.

Missing required payments can create new problems, including fees, credit consequences, or collection activity depending on the account and circumstances.

Step 3: Find Out How Much Extra You Can Pay

Your debt strategy depends on how much room you have in your monthly budget.

Suppose your take-home income is:

$4,500

and your regular expenses and required payments total:

$4,200

That leaves:

$300 per month

You may be able to direct that $300 toward your highest-priority debt.

Use the:

Monthly Budget Calculator

if you need help identifying how much room your budget currently has.

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Step 4: Prioritize the Highest Interest Rate

Using the earlier example:

The repayment order would be:

Credit Card A → Credit Card B → Personal Loan → Car Loan

That is the debt avalanche approach.

The main goal is reducing the most expensive debt first.

Why the Highest-Interest Debt Usually Comes First

Suppose you owe:

$4,000 at 24%

and:

$4,000 at 8%

If you have an extra $300 to pay each month, directing that money toward the 24% balance generally reduces more interest than sending it to the 8% balance.

The exact interest savings depend on how the lender calculates interest, payment timing, fees, and the account terms.

But the general principle is straightforward:

Higher rate = more expensive debt

Use the Debt Avalanche Calculator

The Budget & Freedom Debt Avalanche Calculator can help you model a highest-interest-first strategy using your own balances and rates.

Use the Debt Avalanche Calculator

This is especially useful when you have several debts and want to see how the payoff order may change.

What If the Smallest Debt Has a Lower Interest Rate?

This is where the debt snowball and debt avalanche can point in different directions.

Suppose you have:

Debt A: $500 at 10%

Debt B: $5,000 at 24%

The snowball prioritizes Debt A because the balance is smaller.

The avalanche prioritizes Debt B because the interest rate is higher.

From a mathematical interest-cost perspective, Debt B generally deserves priority.

But if eliminating the $500 balance quickly gives you enough motivation to continue, you may still prefer the snowball.

See:

Debt Snowball vs. Debt Avalanche

Should You Always Pay the Highest-Interest Debt First?

Not always.

There are situations where another priority may make sense.

Examples include:

• A promotional rate is about to expire
• One debt could trigger serious consequences if not addressed
• A very small balance can be eliminated immediately
• A debt has special repayment terms
• A secured debt puts an important asset at risk
• A lender offers a meaningful settlement or restructuring option
• Your financial situation requires a different short-term priority

The highest interest rate is an important factor, but it is not the only factor.

What If a 0% Promotional Rate Is About to End?

A 0% promotional balance may look inexpensive today.

But if the rate will soon jump to 20% or more, it could become one of your most expensive debts.

Review:

• Promotional end date
• Rate after promotion
• Transfer fees
• Required payments
• Whether deferred interest applies
• Remaining balance

Do not assume a 0% balance should always be paid last.

The upcoming rate matters too.

What If You Have Payday or Extremely High-Cost Debt?

Very high-cost short-term debt can deserve immediate attention because fees and effective borrowing costs may be extremely high.

If this type of debt is part of your situation, the normal avalanche principle still applies:

Address the most expensive debt first

However, if required payments are becoming unmanageable, repayment strategy alone may not be enough.

Professional assistance may be appropriate.

Should You Build Savings Before Paying High-Interest Debt?

Some emergency savings can be useful even while paying down expensive debt.

If you have no savings at all, an unexpected expense can force you back into borrowing.

A possible progression is:

Small emergency buffer → Aggressive high-interest debt repayment → Larger emergency fund

Your first savings target might be:

$250

$500

or:

$1,000

depending on your circumstances.

See:

How to Save Your First $1,000

Should You Invest While Carrying High-Interest Debt?

This depends on your circumstances.

High-interest debt can create a difficult hurdle for investment growth to overcome.

For example:

Credit card rate: 22%

Hypothetical investment return: 7%

The credit-card cost is based on the debt terms.

The investment return is uncertain.

That can make high-interest debt a strong priority.

However, employer matching, taxes, pension contributions, or other considerations can complicate the decision.

The broader trade-off will be covered in:

Should You Save Money or Pay Off Debt?

Should You Use Savings to Pay Off High-Interest Debt?

Possibly.

If you have substantial savings beyond what you need for emergencies, using some of that money to reduce expensive debt can lower interest costs.

But draining your savings completely can create another risk.

Consider:

• Emergency-fund size
• Income stability
• Upcoming expenses
• Interest rate
• Insurance
• Other available financial resources

A balanced approach may make more sense than using every dollar of savings.

Should You Consolidate High-Interest Debt?

Debt consolidation can sometimes reduce interest costs by replacing several debts with one lower-rate loan.

But consolidation is only helpful if the new arrangement actually improves your financial position.

Compare:

• New interest rate
• Existing rates
• Fees
• Repayment term
• Monthly payment
• Total repayment cost
• Whether the new rate can change
• Whether collateral is required

A lower monthly payment alone does not guarantee lower total cost.

Balance Transfers for High-Interest Credit Card Debt

A balance transfer may temporarily reduce the interest rate on credit card debt.

This can be helpful if:

• The promotional rate is significantly lower
• Transfer fees are reasonable
• You have a realistic repayment plan
• You understand the post-promotion rate

For example:

Balance: $6,000

Transfer fee: 3%

Fee:

$6,000 × 3% = $180

New effective balance:

$6,180

If the promotional period lasts 12 months, you would need approximately:

$515 per month

to eliminate the balance before the promotion ends.

The lower rate only helps if the repayment plan is realistic.

High-Interest Credit Card Debt

Credit cards are one of the most common forms of high-interest consumer debt.

If your main concern is credit-card balances, see:

How to Pay Off Credit Card Debt

and:

Credit Card Payoff Calculator

These resources are more specific than a general debt payoff plan.

What If You Have Several High-Interest Credit Cards?

If several cards have similar high rates, the order may matter less.

For example:

Card A: 23.99%

Card B: 22.99%

Card C: 21.99%

The mathematical difference may be relatively small.

In that case, you might use the smaller balance as a tiebreaker.

That gives you an earlier payoff while still staying close to the avalanche approach.

What If Interest Rates Are Variable?

Variable-rate debt can change over time.

Suppose:

Debt A = 12%

Debt B = 11%

If Debt B later rises to 14%, your repayment priority may change.

You do not need to reorganize your plan every week.

But reviewing rates periodically can help ensure your strategy still makes sense.

High-Interest Debt vs. Mortgage Debt

A mortgage may have a much larger balance than a credit card.

But the interest rate may be much lower.

For example:

Mortgage: $250,000 at 5%

Credit card: $8,000 at 22%

Even though the mortgage balance is much larger, the credit card is generally the more expensive debt per dollar borrowed.

That is why focusing only on balance size can be misleading.

High-Interest Debt vs. Student Loans

Student loan terms vary substantially between Canada and the United States and can involve different interest rates, repayment programs, benefits, and government rules.

Do not automatically treat all student debt like credit-card debt.

Review:

• Interest rate
• Government repayment programs
• Tax treatment
• Forgiveness or assistance options
• Repayment flexibility

Country-specific student-loan decisions deserve separate analysis.

Should You Pay Off a Car Loan Before a Credit Card?

Usually, compare the rates first.

Suppose:

Car loan = 7%

Credit card = 21%

The credit card generally deserves priority under an avalanche strategy.

Continue making the required car payment while directing extra money toward the card.

What About Buy Now, Pay Later Debt?

Buy now, pay later arrangements vary significantly.

Some may charge no interest if paid according to the terms.

Others can involve fees, interest, or penalties.

Check:

• Interest rate
• Late fees
• Payment schedule
• Promotional conditions
• What happens after a missed payment

Do not assume every installment plan is inexpensive simply because the monthly payment looks small.

How Extra Payments Help

Extra payments reduce principal faster.

A smaller balance usually means less future interest.

Suppose your regular debt payments total:

$700 per month

and you can add:

$200

Your total repayment becomes:

$900 per month

That additional $200 can significantly affect the payoff timeline, especially when applied to high-interest debt.

Use the:

Debt Payoff Calculator

to compare different payment amounts.

Roll Payments Forward

Once your highest-rate debt is paid off, redirect that payment toward the next debt.

Suppose you were paying:

$500 per month

toward Card A.

Card B has a required payment of:

$100

Once Card A is gone:

$500 + $100 = $600 per month

can go toward Card B.

When Card B disappears, that payment rolls forward again.

This is how the avalanche gains momentum.

Do Not Add New High-Interest Debt While Paying It Off

This sounds obvious, but it can be difficult in practice.

If you pay:

$500

toward a card while adding:

$400

of new charges, your progress is much smaller than it appears.

Try to identify why the debt keeps growing.

Possible causes include:

• Monthly spending above income
• Unexpected emergencies
• Irregular expenses
• Income loss
• High fixed costs
• Overspending
• Medical costs
• Large one-time purchases

Addressing the cause is just as important as choosing the repayment order.

Use Sinking Funds to Prevent New Debt

Predictable expenses should not automatically become emergencies.

Examples include:

• Vehicle maintenance
• Annual insurance
• Gifts
• Holiday spending
• School expenses
• Home maintenance

If you expect:

$1,200

of annual vehicle maintenance:

$1,200 ÷ 12 = $100 per month

Saving $100 monthly can reduce the chance that the next repair ends up on a high-interest credit card.

What If You Cannot Afford More Than Minimum Payments?

Start by maintaining required payments if you can.

Then examine your budget.

Look at:

• Housing
• Transportation
• Insurance
• Food
• Subscriptions
• Discretionary spending
• Income opportunities

If there is little discretionary spending left, cutting small expenses may not solve the problem.

Increasing income, restructuring debt, or getting professional help may be more important.

When High-Interest Debt Becomes Unmanageable

Warning signs can include:

• Missing required payments
• Borrowing to make other debt payments
• Using credit for basic necessities
• Increasing balances despite regular payments
• Accounts going to collections
• Being unable to cover minimum payments

At that point, a repayment calculator may not be enough.

Depending on your location and circumstances, consider contacting creditors directly or speaking with a reputable credit counsellor or appropriate licensed debt professional.

Be cautious with companies promising guaranteed debt elimination or pressuring you into expensive programs before explaining the risks and fees.

Canada and U.S. Differences

The basic repayment principle is similar in both countries:

Pay required amounts → Focus extra money on the most expensive debt → Reduce new borrowing

However, consumer-credit rules, insolvency systems, student-loan programs, and debt-relief options differ between Canada and the United States.

Country-specific solutions should therefore be researched separately.

A High-Interest Debt Example

Suppose you owe:

You have an extra:

$350 per month

First Priority

Credit card:

$150 + $350 = $500 per month

The other debts continue receiving minimum payments.

Second Priority

Once the credit card is gone, that $500 rolls toward the line of credit:

$175 + $500 = $675 per month

Third Priority

Once the line of credit is gone:

$300 + $675 = $975 per month

can go toward the car loan.

The same monthly budget gradually produces larger payments as each debt disappears.

High-Interest Debt Payoff Checklist

Before you start, know:

• Every debt balance
• Every interest rate
• Every minimum payment
• Every due date
• Which rates are variable
• Which promotional rates will expire
• Your available monthly extra payment
• Your emergency savings
• Your repayment order
• What caused the debt
• How you will avoid adding new balances

A clear list often makes the next decision much easier.

When Should You Reassess Your Payoff Order?

Review your strategy if:

• A promotional rate expires
• A variable rate changes significantly
• You refinance or consolidate
• Your income changes
• Your available payment changes
• You eliminate a balance
• A lender changes the account terms

Your repayment plan does not need to remain static forever.

Where High-Interest Debt Fits in Budget & Freedom

The Budget & Freedom framework is:

Budget → Debt → Save → Earn → Grow → Freedom

High-interest debt sits squarely in the Debt stage because expensive borrowing can slow progress toward nearly every later goal.

Reducing it can:

• Lower interest costs
• Free monthly cash flow
• Make saving easier
• Make investing easier
• Improve financial flexibility

The objective is not simply to get rid of a balance.

It is to reclaim more of your future income.

Your Next Step

Write down all your debts.

Then rank them from:

Highest interest rate → Lowest interest rate

Continue making required payments on all of them.

Direct extra money toward the highest-rate debt.

Then use the:

Debt Avalanche Calculator

to see how that strategy may work with your own balances.

If you are dealing mainly with credit cards, use:

Credit Card Payoff Calculator

The best plan is one that reduces expensive debt without making the rest of your budget impossible to maintain.

Frequently Asked Questions

What debt should I pay off first?

If your goal is minimizing interest, paying the highest-interest debt first is usually the most efficient approach. This is called the debt avalanche method.

Should I pay the smallest debt or highest-interest debt first?

Paying the smallest balance first is the debt snowball method and may help with motivation. Paying the highest rate first is the avalanche method and generally focuses on reducing interest costs.

What is considered high-interest debt?

There is no universal cutoff. Credit cards and certain unsecured loans often carry relatively high rates compared with mortgages or other lower-cost borrowing.

Should I pay off a 20% credit card before a 6% car loan?

From an interest-cost perspective, the 20% card would generally be the stronger priority, while you continue making the required payment on the car loan.

Should I use savings to pay off high-interest debt?

It may make sense to use some savings, particularly if you have money beyond your emergency-fund needs. Avoid automatically draining your savings to zero.

Should I invest while paying high-interest debt?

High-interest debt can be a strong priority because the borrowing cost may be much higher than uncertain investment returns. However, employer benefits, taxes, and other factors can affect the decision.

Is a balance transfer worth it for high-interest debt?

It can be useful if the new rate is significantly lower, fees are reasonable, and you have a realistic plan to reduce the balance before the promotional period ends.

Is debt consolidation worth it?

It can help if it lowers your total borrowing cost and creates a manageable repayment plan. A lower monthly payment alone does not guarantee that consolidation is beneficial.

What if several debts have almost the same interest rate?

You could use the smaller balance as a tiebreaker. When rates are very close, the difference in interest cost may be relatively small.

What if I cannot afford more than minimum payments?

Start by maintaining required payments and reviewing your budget. If essential expenses already consume most of your income, increasing income or seeking professional debt assistance may be more useful than trying to cut another small expense.

Related Budget & Freedom Guides

• How to Pay Off Debt
• How to Pay Off Credit Card Debt
• Debt Snowball vs. Debt Avalanche
• How to Stop Living Paycheque to Paycheque
• How to Build an Emergency Fund
• Saving vs. Investing

About the Author

Laura Bennett

Laura Bennett writes about budgeting, saving money, reducing everyday expenses, and building better financial habits. Her goal is to make personal finance topics easier to understand and help readers make more informed decisions with their money.

Financial Disclaimer

Budget & Freedom provides general educational and informational content only. The information on this page is not individualized financial, investment, tax, accounting, or legal advice. Interest rates, fees, loan terms, and debt-relief options vary by lender, country, and individual circumstances. Consider your own situation and, where appropriate, consult a qualified professional before making important financial decisions.