About the Debt Consolidation Calculator
Combining several high-interest debts into one consolidation loan at a lower rate can simplify payments and reduce total interest - but only if the new rate is genuinely lower. Our Debt Consolidation Calculator compares your current average rate against a potential consolidation loan.
How It Works
The calculator computes what your monthly payment would look like at your current average interest rate over your chosen new loan term, then computes the payment at the new consolidation loan's rate over the same term, showing the monthly savings between the two.
Formula & Methodology
Consolidation only creates real value when the blended rate across your existing debts is genuinely higher than the new loan's rate - the calculation itself is just two standard amortization payments compared side by side, but the meaningful judgment is making sure the 'current rate' input reflects a true weighted average across all the debts being consolidated, not just the highest or lowest individual rate among them.
Step-by-Step: Calculating It By Hand
- 1Find your weighted average current interest rate across all debts being consolidated (total interest-bearing balance weighted by each debt's rate).
- 2Calculate the monthly payment at that current average rate over your chosen comparison term.
- 3Calculate the monthly payment at the new consolidation loan's rate over the same term.
- 4Subtract the new payment from the current payment to find monthly savings.
Examples
Meaningful savings
$18,000 in debt averaging 22% APR (typical of credit cards) consolidated into a 4-year loan at 12% produces a noticeably lower monthly payment and less total interest paid.
When it doesn't help
If the new consolidation loan's rate isn't actually lower than your current average rate, this comparison would show no real savings - a sign to keep shopping for a better rate.
Advantages
- Directly compares your current situation against a specific consolidation offer
- Shows monthly savings in real dollars, not just a rate comparison
- Helps verify a consolidation loan offer genuinely improves your situation
- Works for any combination of current rate, new rate, and loan term
Common Mistakes
- Consolidating into a loan without checking that the new rate is actually lower than your current average
- Extending the term significantly, which can lower the monthly payment but increase total interest paid
- Running up new balances on paid-off credit cards after consolidating, ending up with more total debt
- Not accounting for origination fees on the new consolidation loan, which reduce the real benefit
Edge Cases to Watch For
- Extending the loan term as part of consolidation can lower the monthly payment while still increasing total interest paid over the life of the loan - check total cost, not just the monthly figure.
- Origination fees on the new consolidation loan reduce the real benefit and should be weighed against the projected interest savings.
- Consolidating unsecured debt (credit cards) into a loan secured by an asset (like a HELOC) changes the risk profile even if the math shows a lower rate.
- Paying off revolving credit accounts through consolidation but continuing to use them afterward can result in more total debt than before consolidating.
Common Use Cases
- Evaluating whether a debt consolidation loan offer is actually beneficial
- Comparing monthly payment relief against total interest cost
- Deciding on the right term length for a consolidation loan
- Simplifying multiple debt payments into one manageable payment