Is debt consolidation a good idea?

Consolidation makes sense when the new loan rate is meaningfully lower than your existing rates AND you choose a term close to your current aggressive-payoff timeline. Extending the term to lower the monthly payment usually costs more in total interest, even with a lower rate. Always do the full math before committing.

Does consolidation hurt my credit?

Short-term, slightly. The application is a hard inquiry (–3 to –10 points). Longer-term, consolidation often improves credit by reducing credit utilization on revolving accounts and creating a single fixed-installment loan with on-time payments. Score impact usually reverses within a few months of consistent payments.

What types of debt can be consolidated?

Credit cards, personal loans, medical bills, payday loans, and other unsecured debts are commonly consolidated. Federal student loans have their own consolidation programs (Direct Consolidation, not the same as private debt consolidation). Mortgages typically cannot be consolidated into a personal loan — use a cash-out refinance instead.

What's the difference between consolidation and balance transfer?

A consolidation loan is a fixed-rate, fixed-term installment loan that pays off your existing debts; you then pay back the new loan. A balance transfer moves credit card debt to a new credit card with a 0% intro APR for 12–21 months. Balance transfers usually have lower upfront fees and lower intro rates but require you to pay off the bulk of the balance before the intro period ends.

Should I use a HELOC to consolidate credit card debt?

Sometimes — when your equity is sufficient, your income is stable, and the rate savings are large. The HELOC rate (typically 8–10%) beats credit card rates (typically 20%+) easily. The trade-off: your home becomes collateral, so missed payments can lead to foreclosure. The financial math is great; the risk profile is much worse. Use carefully.

Debt Consolidation Calculator

Enter up to three existing debts and a potential consolidation loan to see if combining them saves money. Compare monthly payments, total interest, and payoff timeline between keeping debts separate vs consolidating.

Debt consolidation replaces multiple high-rate debts — typically credit cards, personal loans, and medical bills — with a single new loan, ideally at a lower interest rate and a fixed payoff schedule. Done well, it saves real money on interest and simplifies the monthly payment routine. Done badly, it extends the payoff timeline so far that the total interest paid is actually higher despite the lower rate.

The math hinges on three numbers: the weighted average rate of your existing debts, the rate of the consolidation loan, and the time over which the new loan is repaid. A 22% credit card consolidated into a 10% personal loan is an obvious win on rate. But if the new loan stretches 60 months while you would have paid off the credit card in 30 months by maintaining current payments, the total interest paid can be higher despite the lower rate.

This calculator compares the two paths directly: continuing your current monthly payments against each debt vs. consolidating into a single new loan. It accounts for the consolidation fee (typically 1–8% of the loan amount) and shows the true savings (or cost) of the trade. Use it to make the consolidation decision quantitatively, and to choose the right consolidation term — shorter terms save money; longer terms lower monthly payments.

Inputs

Debt 1 Balance

Debt 1 Rate

Debt 1 Monthly Payment

Debt 2 Balance

Debt 2 Rate

Debt 2 Monthly Payment

Debt 3 Balance

Debt 3 Rate

Debt 3 Monthly Payment

Consolidation Loan Rate

Consolidation Term (Months)

Consolidation Fee %

Results

Current Total Payment

$550/mo

Consolidated Payment

$402/mo

Monthly Savings

$148

Total Interest Savings

$1,899

Current vs Consolidated Interest

Current Debt Breakdown

Last updated: May 25, 2026Reviewed by the CalcMountain editorial team

Formula

Current debts — total amortization (paying current monthly payments): For each debt: Months to payoff = solve M × [1 − (1+r)^(−n)] / r = B for n Total interest = (M × n) − B Where: B = Balance M = Monthly payment r = Monthly rate (annual ÷ 12) Sum across all debts: Total Interest Current = Σ Total Interest per debt Consolidation loan: Loan amount = Σ Balances + Consolidation fee = (B₁ + B₂ + B₃) × (1 + fee%) Monthly payment: M_consol = Loan × [r_c × (1+r_c)^n_c] / [(1+r_c)^n_c − 1] Where: r_c = Monthly consolidation rate n_c = Consolidation term in months Total interest on consolidation: (M_consol × n_c) − Loan Total cost comparison: Current path: Σ B + Total Interest Current Consolidation path: Σ B + Fee + Total Interest Consolidation Savings = Current path total cost − Consolidation path total cost Example: Three debts ($5K @ 22% + $8K @ 18% + $3K @ 15%) totaling $16,000. Current monthly payments: $200 + $250 + $100 = $550/month. Estimated current-path interest if paying these minimums: ~$3,800 (varies based on actual minimum payment behavior). Consolidation: $16,000 + 2% fee = $16,320, 48 months at 9.5%. Monthly payment: ≈ $410/month Total interest paid: ≈ $3,360 Savings: ~$440 over the payoff period. Plus, the consolidated payoff is fixed at 48 months — known, predictable. The current path stretches indefinitely if you only pay minimums. Better scenario: Same debts, but the consolidation rate is 7% (excellent credit, HELOC-style): Total interest: ~$2,400 Savings vs current: ~$1,400 Worse scenario: Same debts, but consolidation stretches to 60 months at 12%: Total interest: ~$5,300 Result: +$1,500 in cost vs current. Lower monthly payment, higher total cost.

How to use this calculator

List your current debts. For each, enter balance, interest rate (annual APR), and current monthly payment. Most credit card and personal loan statements show these clearly.
Enter the consolidation loan rate. Personal loan rates typically run 7–15% for borrowers with good credit, 15–30% for fair credit. HELOC rates are usually 8–11%. Always shop multiple offers before consolidating.
Choose the consolidation term. Shorter terms (24–36 months) save more on total interest but have higher monthly payments. Longer terms (60+ months) lower the payment but cost more in interest. Pick the shortest term you can comfortably afford.
Enter the consolidation fee. Origination fees vary widely: 0% for some credit union loans, 1–5% for most online lenders, up to 8%+ for high-risk borrowers. Always include this in the comparison.
Review the total cost comparison. Savings (or extra cost) accounts for both interest and the upfront fee.
If the savings are small, try a shorter consolidation term to see if it tips the math more favorably.
If the comparison shows extra cost, the consolidation loan rate or term isn't favorable enough — shop for a better rate or skip consolidation entirely and use a payoff-focused plan on your existing debts.

Worked examples

Consolidating credit card debt — clear win

Debt 1: $10,000 credit card at 24% APR, minimum $250/month Debt 2: $6,000 credit card at 19% APR, minimum $180/month Debt 3: $4,000 store card at 28% APR, minimum $100/month Continuing minimums: ~$8,000 in interest over ~3.5 years of payments. Consolidation: $20,000 personal loan at 11% APR, 48-month term, 3% origination fee. New loan amount: $20,600. Monthly payment: $533. Total interest: ~$5,070. Savings: ~$2,900, plus a fixed payoff date 48 months out. Strong consolidation case.

Consolidation that extends term — net loss

Two debts: $8,000 at 16% APR with $300/month payment; $5,000 at 14% APR with $200/month. Aggressive payoff path: At current payments, these clear in roughly 30 and 28 months respectively. Total interest paid: ~$2,400. Consolidation: $13,000 + 4% fee = $13,520. 60-month term at 10% APR. Monthly payment: $287. Total interest paid: ~$4,720. Result: $2,320 MORE in total cost despite the lower rate. The 60-month term doubled the payoff time and gave the bank more interest. The lower monthly payment ($287 vs $500) makes it feel cheaper but costs more. Lesson: a longer term often defeats the rate benefit. Choose a term close to your current aggressive payoff timeline.

HELOC consolidation — lowest rate, highest stakes

Same $20,000 in credit card debt as Example 1, but consolidating via a HELOC at 8.5% (variable, but currently fixed). HELOC interest-only payment during draw: ~$142/month. Full amortization later. If you maintain the $533/month payment from the personal-loan example: pays off in about 44 months with total interest of ~$2,700. Savings vs personal loan: ~$2,370 vs personal loan ~$5,070. But: now the debt is secured by your home. Default risk shifts from credit damage to foreclosure. The math is best, the risk is highest. Only appropriate if income stability is high and the discipline to maintain the higher voluntary payment is real.

When to use this calculator

Use this calculator when you have multiple high-interest debts (typically credit cards or unsecured loans) and a credible consolidation option — a personal loan, balance transfer card, HELOC, or 401(k) loan. The math should be the primary input to the decision; emotional appeal of "one payment" is not enough.

Consolidation makes sense when: (1) the consolidation rate is meaningfully lower than the weighted average of existing rates, (2) you can choose a consolidation term close to your current aggressive-payoff timeline (avoiding term extension that erases rate savings), (3) you have the discipline to not run up the original cards again, and (4) the consolidation fee plus interest savings still produces meaningful total savings.

Skip consolidation when: rates are similar, when the only consolidation option significantly extends the term, when origination fees eat most of the savings, or — most importantly — when the underlying spending behavior hasn't changed and you're likely to re-accumulate debt on the now-zeroed credit cards.

Pair this with the personal-loan calculator (for sizing the consolidation loan), the balance-transfer calculator (the credit-card-specific alternative), the credit-card-payoff calculator (to see what aggressive payoff without consolidation looks like), and the debt-snowball calculator (for the alternative behavioral approach of paying off smallest balance first regardless of rate).

A common variant worth knowing: balance transfer cards offer 0% APR for 12–21 months in exchange for a 3–5% transfer fee. For small to mid-size credit card balances ($3K–$15K) and disciplined payoff plans, balance transfers often beat both consolidation loans and HELOCs on math — because the introductory 0% rate is unbeatable. The catch is the post-intro APR (typically 20%+) on any remaining balance.

Common mistakes to avoid

Choosing a longer term to lower the monthly payment. This is the single most common debt-consolidation mistake. Lower monthly payment feels good but usually means substantially more total interest. Match the term to your aggressive-payoff timeline.
Continuing to use the consolidated credit cards. The consolidation pays off the cards but doesn't close them. Many borrowers run the balances back up within a year, ending up with the consolidation loan PLUS new credit card debt. Cut up cards or freeze them in ice if you don't trust yourself.
Ignoring the consolidation fee. A 3% fee on $20,000 is $600 — that has to be subtracted from interest savings to find the true benefit. Always include the fee in the comparison.
Using a HELOC to consolidate without considering the foreclosure risk. Credit card default damages credit; HELOC default can result in losing your home. The lower rate comes at the cost of much higher consequence for missed payments. Only appropriate with very stable income.
Consolidating via 401(k) loan as a "free" option. 401(k) loans must be repaid (usually within 5 years), often become due within 60–90 days if you leave your job, and pause the compounding of the borrowed funds during the loan period. Often more expensive in opportunity cost than the headline rate suggests.
Skipping the credit shop. Consolidation loan rates vary widely (sometimes 5%+ APR difference) across lenders for the same borrower. Get 3–4 quotes from credit unions, online lenders, and banks before choosing. A few hours of shopping can save thousands in interest.

Frequently Asked Questions

Sources & further reading

Debt consolidation — explainer — U.S. Consumer Financial Protection Bureau
Coping with debt — guidance for consumers — U.S. Federal Trade Commission
Choosing a debt-relief company — warnings about scams — U.S. Federal Trade Commission

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