Which calculation do you need?
Before borrowing, the loan and APR calculators answer the shopping questions: what payment does this amount, rate and term produce, and what is the loan's real annual cost after fees? For specific loans — car, personal, student — the dedicated calculators include their fees and typical structures. Already in debt: the payoff calculator orders multiple debts avalanche or snowball style, and the consolidation calculator tests whether combining them actually saves money or merely stretches it.
- Shopping: loan calculator, APR calculator, DTI calculator (what lenders will allow).
- Specific loans: auto, personal, student loan calculators.
- Getting out: debt payoff, credit card, consolidation calculators.
A worked example
A $28,000 car loan at 8.5% for 72 months costs $494 a month and $7,550 in interest. The same loan over 48 months costs $690 a month and $5,130 in interest. The shorter term 'costs' $196 more each month and saves $2,420 overall — and leaves two years with no payment at all. Term length is the most expensive slider on any loan page, and the one dealers adjust first.
Mistakes that distort the answer
- Judging a loan by its payment; extending the term always shrinks the payment and grows the total.
- Comparing loans by nominal rate when fees differ — APR exists precisely to make that comparison honest.
- Consolidating debts into a longer term and calling the lower payment a saving; it is frequently the opposite.
Questions, answered
What debt-to-income ratio do lenders want?
For mortgages, total debts under 36–43% of gross income is the common band; lower is better priced. The DTI calculator shows where you stand.
Does paying a loan off early hurt my credit?
Scores may dip slightly when an account closes because average age and mix change, but the effect is small and temporary, and it is never worth paying interest to avoid.
Reviewed by Tahir Shehzad, ACMA · Content reviewed November 2026 against primary sources — see our Methodology and Editorial Policy. Figures are educational estimates, not tax or financial advice.
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