Term Loan vs Line of Credit: How They Differ

A term loan provides a lump sum that you repay over a set schedule, while a line of credit lets you draw funds up to a limit, repay them, and borrow again as the agreement allows. This calculator estimates the monthly payment and total interest for a fixed-rate, fully amortizing term loan; enter the loan amount, annual percentage rate (APR), and term to see the results.

Formula

For a fixed-rate loan with equal monthly payments, the payment is the loan principal multiplied by the monthly interest rate, divided by one minus (one plus the monthly rate) raised to the negative number of payments:

PMT = P × r / [1 − (1 + r)−n]

• P is the amount borrowed, in dollars.
• r is the monthly interest rate as a decimal: APR ÷ 1,200 when APR is entered as a percentage.
• n is the total number of monthly payments: loan term in years × 12.
• PMT is the calculated monthly payment in dollars.

The calculator rounds the payment to cents. Total interest is calculated as the rounded monthly payment multiplied by the number of payments, minus the principal: Interest = PMT × n − P. This assumes the stated payment is made for every scheduled month; actual lender schedules may adjust the final payment for rounding.

Worked Example

Using the calculator’s defaults—$20,000 principal, 8% APR, and a five-year term:

1. Convert APR to a monthly decimal rate: r = 8 ÷ 1,200 = 0.0066667.
2. Find the number of payments: n = 5 × 12 = 60.
3. Substitute into the payment formula: PMT = 20,000 × 0.0066667 ÷ [1 − (1 + 0.0066667)−60] ≈ $405.53.
4. Calculate total interest using the rounded payment: $405.53 × 60 − $20,000 = $4,331.80.

Assumptions

• The interest rate stays fixed throughout the modeled term.
• Payments are monthly and made at the end of each monthly period.
• Interest compounds monthly at APR ÷ 12.
• The estimate excludes fees, taxes, insurance, PMI, and escrow; none of those costs is entered in this calculator.

How a Term Loan Works

With a term loan, the borrower receives an agreed amount, generally as a one-time disbursement, and repays it according to the contract. Repayment may involve regular installments over a specified period, though the exact schedule, rate structure, and any fees depend on the agreement. A term loan can suit a defined expense—such as equipment or a project—because the amount and repayment schedule are established upfront.

In a standard fully amortizing loan, each scheduled payment covers interest due for that period and reduces principal. Early payments usually contain a larger interest share than later payments, because interest is calculated on the outstanding balance. A fixed payment does not mean the interest portion is fixed: the mix changes as the balance declines.

How a Line of Credit Works

A line of credit establishes a maximum amount that may be borrowed, rather than handing over the full limit at once. The borrower draws funds when needed, subject to the contract, and available credit generally changes as draws and repayments affect the balance. Some agreements allow repeated borrowing during a defined access period; others restrict or end access under stated conditions.

Interest is generally tied to the amount outstanding, not the unused limit, but the specific calculation and billing terms vary. A line may have a variable rate, a draw fee, an annual fee, minimum payments, or other conditions; those features are contract-specific, not universal. Repayment may not follow the same fixed amortization schedule as a term loan. A line’s limit is not the same as a cash balance: it is borrowing capacity subject to the agreement.

Key Differences and Costs

• Access to money: A term loan typically delivers one principal amount. A line permits draws over time within its limit, if the agreement allows.
• Repayment: A term loan has a defined installment schedule. A line’s required payments can depend on its balance and contract terms.
• Interest: A term loan’s interest is based on its outstanding loan balance. A line generally accrues interest on amounts drawn, but rates can be variable and terms differ.
• Flexibility: A line can address expenses that arise at different times. A term loan provides a predetermined sum and schedule.
• Overall cost: Compare more than the advertised rate. Fees, rate changes, draw timing, repayment rules, and the time a balance remains outstanding can affect total cost.

For instance, borrowing $20,000 at once for a purchase is structurally different from drawing $5,000 now and another $5,000 later from a line. Even if both arrangements show the same quoted APR, timing and fees can lead to different interest totals. This calculator models only a single term-loan balance with regular payments; it does not calculate a line of credit or compare offers.

How to Choose Between Them

The practical distinction is whether you need one known amount or access to borrowing at different times. Consider the purpose and timing of expenses, how predictable the amount is, and whether you can manage the repayment structure. Then read the proposed agreement rather than assuming all products with the same name work alike.

• Ask whether funds are delivered at once or drawn as needed.
• Check whether the rate is fixed or can change, and how the contract defines it.
• Identify payment requirements, repayment period, and any deadline for drawing funds.
• Review fees, collateral or guarantee provisions, and what happens if access ends or payments are missed.
• For a line, consider whether you need to leave part of the limit unused and how quickly repayments restore available credit.

Use the calculator as a payment illustration, not as a measure of eligibility or an offer. Enter the APR and term supplied for the specific proposal; do not treat the default values as current market terms. Ask the lender for the complete cost schedule and its treatment of fees or variable rates.

Common Misconceptions and Limits

A line of credit is not automatically cheaper simply because interest may apply only to drawn funds. Fees, rates, and repayment terms matter, and a balance that remains outstanding can accrue interest over time. Nor is a term loan always fixed-rate: “term” describes a repayment period, not by itself whether the rate can change.

Likewise, the monthly payment shown here is not necessarily the full monthly cash cost of borrowing. It excludes fees and other expenses and assumes payments arrive on schedule. The formula is unsuitable for interest-only periods, balloon payments, variable rates, irregular payments, or a line with changing draws. For those cases, use the actual agreement’s figures and a calculation that reflects its cash flows.

Frequently Asked Questions

Is a line of credit the same as a loan?
A line of credit is a borrowing arrangement, but it provides access up to a limit rather than necessarily disbursing one fixed lump sum. Its draw and repayment terms depend on the contract.

Do you pay interest on an unused line of credit?
Interest is generally charged on drawn balances, but an agreement may impose other charges, including fees associated with maintaining or accessing the line. Check its fee schedule.

Can a term loan have a variable interest rate?
Yes. “Term loan” refers to borrowing repaid over a stated period; the contract determines whether the interest rate is fixed or variable.

Which is better for an unpredictable expense?
A line can provide access to funds at different times, while a term loan gives a set amount. The relevant terms, costs, and repayment capacity differ by agreement; this is a comparison of structure, not a personal recommendation.

Does this calculator compare a term loan with a line of credit?
No. It estimates a fixed-rate term loan’s monthly payment and total interest. A line requires details such as draw amounts, dates, rate changes, fees, and payment rules that this calculator does not model.

This result is an estimate; the lender’s disclosure gives the exact figures.

Related

• Loan Term vs Amortization Term: Key Differences
• Loan Termination Program: Meaning and Payoff Calculator
• Loan Term Sheet: Meaning, Terms, and How to Review

in p | Loan amount | $ | 20000 | 1 | 100000000
in apr | Interest rate (APR) | % | 8 | 0.01 | 100
in yrs | Loan term | years | 5 | 0.0833 | 50
out pmt | Monthly payment | $ | p * (apr / 1200) / (1 - (1 + apr / 1200) ^ -(yrs * 12)) | 2
out int | Total interest | $ | pmt * yrs * 12 - p | 2