If you've been researching mortgage rates, you've probably seen changes described in basis points instead of percentages. That can be confusing, especially when you're already navigating unfamiliar mortgage terms and trying to understand how even small rate changes affect your loan.

This article explains what basis points are, why lenders and financial markets use them, and how they can affect mortgage rates and overall loan costs.

What Is a Basis Point?

A basis point is a unit of measurement used in finance to describe small changes in interest rates, yields, or percentages. Basis points are often referred to as BPS, and they provide a precise way to communicate changes without confusion.

In mortgages, basis points are commonly used to describe changes in interest rates. Because mortgage rates often move in small increments, using basis points instead of percentages helps avoid misunderstandings. For example, saying a rate increased by 25 basis points is clearer than saying it increased by 0.25%.

Basis points are especially useful when tracking rate changes over time, including how often mortgage rates move based on market conditions.

How Much Is a Basis Point?

One basis point is equal to 1/100th of a percentage point, or 0.01%. Therefore, 100 basis points equal 1%.

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How to Calculate Basis Points

Calculating basis points is straightforward once you understand the relationship between basis points and percentages.

• To convert basis points to a percentage, divide the number of basis points by 100.
• To convert a percentage to basis points, multiply the percentage by 100.

For example:

• 50 basis points divided by 100 equals 0.50%.
• A 1.25% change multiplied by 100 equals 125 basis points.

This simple math helps explain why even small changes measured in basis points can still have a noticeable impact on interest rates and loan costs.

Basis Points Example

To see how these changes impact a mortgage, let's compare two interest rates on a $300,000, 30-year fixed-rate mortgage:

• Loan amount: $300,000
• Term: 30 years
• Interest rate option one: 6.50%
• Interest rate option two: 6.25% (25 basis points lower)

At 6.50%, the estimated monthly principal and interest payment is about $1,896.

At 6.25%, the estimated monthly payment drops to about $1,847.

The difference of 25 basis points saves roughly $49 per month.

Over the full 30-year loan term, those monthly savings add up to approximately $17,600 less in total interest paid. While a 25-basis-point difference may seem minor, it can change your monthly payment and the total interest paid over the life of the loan by thousands of dollars.

This example shows how even modest basis-point changes can significantly affect both monthly affordability and long-term loan costs.

How Basis Points Are Used

Basis points are used across many financial instruments to measure percentage changes in rates or yields. You'll often see them referenced in discussions about the Federal Reserve and broader financial markets because they provide a precise way to describe even small rate movements.

• Interest rates: Lenders use basis points to describe changes in mortgage rates and other loan rates with precision.
• Investments: Basis points are used to explain changes in returns, fees, or yields on investment products.
• Credit cards: Variable credit card interest rates may change in increments measured in basis points.
• Bonds: Bond yields and price changes are commonly quoted in basis points.
• Risk management: Financial institutions use basis points to assess and manage interest rate risk.

This list is not exhaustive, but it highlights how widely basis points are used throughout the financial system and why understanding them can be helpful when reviewing not just mortgages, but any financial product.

Mortgage Basis Point Changes: What to Know

In mortgages, basis point changes can affect both monthly payments and the total cost of a loan. Even a small increase or decrease in basis points may influence how affordable a mortgage is over time.

Basis points are especially important for adjustable-rate mortgages (ARMs) because rates can change after an initial fixed period. They also matter when comparing adjustable-rate versus fixed-rate options. Knowing how rate changes work can make it easier to decide which mortgage structure aligns with your financial goals a href="/learn/mortgages/compare-mortgages">which mortgage structure aligns with your financial goals.

Final Thoughts: Why Understanding Basis Points Matters

Basis points play an important role in how mortgage rates are set and compared. Even a small amount of points can result in a difference of thousands over the life of a loan. Understanding what basis points are, how they're calculated, and how they affect mortgage costs can help you make more informed decisions when exploring home financing options.

If you're ready to take the next step, you can learn more about current mortgage options or see what you may qualify for based on your goals.

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