How do loans work? Understanding loan payments, interest, and repayment

By Carolyn Morris | Published on October 21, 2025

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When you borrow money in the form of a loan, you commit to repaying the principal amount plus interest over a specified period. This repayment typically occurs over the life of your loan, whether that’s three years or 30 years. Before signing a loan agreement, it's crucial to understand how your payments will be applied over time. Let's explore the key aspects of loans and how Earnest can be your trusted financial partner throughout this journey.

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How does a loan work?

A loan is a commitment where you, the borrower, receive funds from a lender and agree to repay the total amount borrowed, along with interest over a defined period. The terms of each loan are outlined in a contract provided by the lender. Loans can be categorized into two main types.

• Secured loans. These loans require collateral, such as a house or car, which provides the lender with security. If the borrower defaults, the lender can claim the collateral to recover the loan amount.
• Unsecured loans. These loans do not require collateral, making them riskier for lenders. As a result, they often come with higher interest rates to compensate for the increased risk. Student loans are an example of an unsecured loan.

How does your credit history impact your interest rate?

Before obtaining a loan, you'll need to apply, and lenders will assess your creditworthiness. Initially, they may perform a soft credit inquiry to ensure you meet the minimum requirements. If you proceed with the application, a hard credit check will be conducted to review your credit history in detail.

You can review your own credit history by requesting a free annual credit report from major credit agencies like Experian, TransUnion, and Equifax. Understanding your credit report allows you to see what lenders evaluate.

Your credit score significantly influences the interest rate offered. A higher credit score indicates to lenders that you're a reliable borrower, potentially qualifying you for lower interest rates and larger loan amounts. Conversely, a lower credit score may result in higher interest rates. If your credit score needs improvement, consider taking steps to build it before applying for a loan to secure better terms.

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How is interest calculated?

Interest is the cost of borrowing money, expressed as a percentage of the principal loan amount. Different methods of calculating interest include:

• Simple interest. Calculated only on the principal amount. For example, borrowing $2,000 at a 5% simple interest rate for one year results in $100 interest, totaling $2,100.
• Compound interest. Calculated on the principal and the accumulated interest. Using the same example, in the second year, interest is calculated on $2,100, leading to higher total interest over time.
• Amortized interest. Common in loans like mortgages and car loans, where payments are structured so that early payments cover more interest than principal. Over time, a larger portion of each payment goes toward reducing the principal.
• Fixed interest rates. Remain constant throughout the loan term, providing predictable monthly payments.
• Variable interest rates. Can fluctuate based on market conditions, leading to changes in monthly payment amounts over time.

How does a loan payment work?

Loan payments are typically made in regular installments over the loan term. Each payment covers both interest and a portion of the principal. Paying more than the minimum payment reduces the principal faster, decreasing the total interest paid over the life of the loan.

At Earnest, we offer flexible repayment options tailored to your financial situation. Our commitment is to be every student's first and best financial partner, providing tools and resources to help you manage your loans effectively.

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How do payments change over the life of a loan?

In amortized loans, as you pay down the principal, the interest portion of each payment decreases, and more of your payment goes toward the principal. This shift means that over time, you pay less in interest and more toward reducing the loan balance.

What loan products does Earnest offer?

• Student loan refinancing. Refinancing allows you to adjust the interest rate and terms of your existing student loans to better reflect your current financial standing. This option is ideal for individuals who have improved their income, career status, or credit score since graduation.
• Private student loans. For students currently enrolled and seeking funds to cover educational expenses, Earnest offers private student loans with a simple application process. We educate borrowers and cosigners throughout the process, ensuring transparency and understanding.

To assist you in understanding your payments, we provide user-friendly tools.

• Student loan calculator. Estimate your monthly payments and total loan cost with our calculator.
• Student loan refinance calculator. Determine potential savings and new payment terms by refinancing your student loans.

Empowering your financial journey with Earnest

At Earnest, we're more than just a lender—we're committed to being your first and best financial partner. We understand that loans are not just financial tools; they are stepping stones toward achieving your goals, whether that's earning a degree, advancing your career, or reaching new personal milestones.

With our range of student loan products, refinancing options, and easy-to-use calculators, we aim to provide clarity and confidence in your financial journey. Our goal is to simplify the loan process, so you can focus on what truly matters—your education, aspirations, and future.

As you take the next step in your financial planning, remember that we're here to support you every step of the way. With flexible terms, competitive rates, and a mission to empower students and professionals alike, Earnest is ready to help you turn your dreams into reality.