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Fractional reserve banking is an economic system that goes on behind the scenes at the institutions where you keep your money. It allows the bank to keep only a fraction of the money you deposit as cash for withdrawal.

The rest of the funds may be loaned out for other purposes. This allows the bank to make money and stay in business, and it can also help keep the economy humming along.

Here’s a closer look at fractional reserve banking, its history, and its pros and cons.

What Is Fractional Reserve Banking?

The system of banking used most widely around the world today is called Fractional Reserve Banking (FRB). In this system, only some of the money that exists in bank accounts is backed by physical cash that people can withdraw. Banks can then take the extra money and lend it out, which theoretically helps to expand the economy.

In simpler terms, if someone goes to the bank and deposits money into their account, the bank only holds on to a certain amount of that cash, and they lend the rest of that out to individuals and businesses. This encourages spending and investing and puts more money into the economy as a whole.

Fractional reserve banking is also one of the main ways that banks make money, as they can see earnings from the difference between any interest they pay to customers and the interest they charge borrowers for taking out loans.

💡 Quick Tip: Typically, checking accounts don’t earn interest. However, some accounts do, and online banks are more likely than brick-and-mortar banks to offer you the best rates.

The History of Fractional Reserve Banking

The origins of fractional reserve banking aren’t entirely clear, but the system is generally believed to have been created during the Middle Ages. At that time, more and more people began storing their money in banks, and the banks wanted to be able to transfer coins between customer accounts, rather than storing the exact coins that were deposited until the future time when the customer wanted to withdraw them. This evolved into deposits being treated as a sort of IOU, and the system continued to develop from there.

Requirements of Fractional Reserve Banking

In the past, the Federal Reserve (aka “the Fed”) required banks of a certain size to have a set percentage of funds tied up in reserves. Prior to March 2020, large banks (whether traditional vs. online) with more than $124.2 million in assets were required to keep 10% in reserves, but smaller banks had different requirements. Banks with assets between $16.3 million and $124.2 million were required to hold 3% in reserves, and banks with under $16.3 million in assets were not required to hold any reserves.

These reserves could be held by the bank itself or put into an account at the Federal Reserve, known as a reserve balance.

However, in March 2020, the Federal Reserve Board lowered the reserve requirement to 0% across the board and replaced it with Interest on Reserve Balances (IORB) as an incentive for banks to maintain reserves, which banks continue to do. Typically, banks have enough money in reserve to accommodate everyday business, including all withdrawals.

The Fractional Reserve Multiplier Equation

Though it’s not relevant with today’s 0% reserve requirements, the multiplier equation has been used in the past to estimate the impacts of fractional reserve banking on the economy. This equation helps figure out how much money can potentially be created in the financial system from bank lending, which sets off a chain reaction of economic activity.

For example, let’s say you deposit $1,000 in a bank and the bank keeps $100 and lends out the remaining $900 to John who needs money to pay for a home repair. John pays the contractor, who then deposits that $900 in another bank, which then keeps $90 and lends out $810, and so on. This pattern continues, effectively multiplying the original deposit.

The fractional reserve multiplier equation is:

Initial Deposit x 1/Reserve Requirement

So if a bank has $500 million in total assets and it was required to hold 10% in reserves, that would be $50 million. Using the multiplier equation, the calculation would be:

$500 million x 1/10% = $5 billion

This means that $5 billion can potentially be created in the economy through the system of fractional reserve banking. This is different from printing new money and is simply an estimate of the impacts of FRB.

Recommended: Federal Reserve Interest Rates, Explained

Pros of Fractional Reserve Banking

There are both upsides and downsides to the fractional reserve banking system. Some of the pros are:

•   Banks can use most of the money that gets deposited to grant loans and earn interest on those loans.

•   Banks also earn interest on the reserves they hold.

•   The system helps grow the economy.

Most of the time the system works well. Banks make money on interest, money gets released into the economy, and much of the time that money helps borrowers to earn money as well. The idea is that borrowers invest money into their home, business, or other activities, which in turn helps them grow their wealth. They then pay the bank back for the loan and the cycle continues.

Recommended: The Difference Between a Checking and Savings Account

Cons of Fractional Reserve Banking

However, some of the cons of fractional reserve banking are:

•   Banks don’t keep 100% of deposits on hand, which can be a problem if there is a bank run. During the Great Depression, a significant number of banks had to close because too many people were trying to take cash out and the banks didn’t have enough. (These days, the government insures deposits of up to $250,000 per depositor, per institution and account ownership type, which means you can’t lose your money — up to the insured limit — in the rare event of bank failure.)

•   If the bank creates too much money and lends it out unwisely, it can lead to economic instability, inflation, and financial crises.

•   Banks can respond to higher reserve requirements by increasing interest rates on loans and paying lower annual percentage rates (APYs) on deposits.

The Takeaway

The fractional reserve banking system is an economic system that typically requires banks to keep a certain amount of cash on hand for withdrawals. The rest of the money may be loaned out and used for other purposes, which helps the bank earn money and the economy grow.

This is going on behind the scenes when you bank. Many people are interested in finding a bank that suits their financial and personal needs, however, with features such as a competitive interest rate and rewards.

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Interested in opening an online bank account? When you sign up for a SoFi Checking and Savings account with eligible direct deposit, you’ll get a competitive annual percentage yield (APY), pay zero account fees, and enjoy an array of rewards, such as access to the Allpoint Network of 55,000+ fee-free ATMs globally. Qualifying accounts can even access their paycheck up to two days early.

FAQ

What is fractional reserve banking in simple terms?

Fractional reserve banking is a system where banks are only required to keep a small portion of customer deposits in reserve — usually to meet withdrawal demands — and can lend out the rest. The money banks loan to individuals and businesses then gets deposited back into other banks, repeating the process, and creating more money in the economy.

How do banks create money from a $1,000 deposit?

When you deposit $1,000 in a bank, the bank may keep a fraction — say 10% or $100 — and lend out the remaining $900. That $900 might be spent and redeposited in another bank, which then keeps $90 and lends out $810, and so on. This cycle continues, essentially multiplying your original deposit. Through this process, known as the money multiplier effect, banks create money by expanding the money supply beyond the original deposit.

How much money are banks required to have on hand?

Historically, banks have been required to keep a certain percentage of customer deposits in reserve, known as the reserve requirement. This percentage is set by the Federal Reserve (aka “the Fed”) and was generally around 10%, meaning banks had to keep $100 on hand for every $1,000 in deposits. However, in March 2020, the Fed reduced the reserve requirement to 0%.

While banks don’t currently have a specific minimum requirement, they still maintain reserves for operational needs and to comply with other regulations.

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Annual percentage yield (APY) is variable and subject to change at any time. Rates are current as of 12/23/25. There is no minimum balance requirement. Fees may reduce earnings. Additional rates and information can be found at https://www.sofi.com/legal/banking-rate-sheet

Eligible Direct Deposit means a recurring deposit of regular income to an account holder’s SoFi Checking or Savings account, including payroll, pension, or government benefit payments (e.g., Social Security), made by the account holder’s employer, payroll or benefits provider or government agency (“Eligible Direct Deposit”) via the Automated Clearing House (“ACH”) Network every 31 calendar days.

Although we do our best to recognize all Eligible Direct Deposits, a small number of employers, payroll providers, benefits providers, or government agencies do not designate payments as direct deposit. To ensure you're earning the APY for account holders with Eligible Direct Deposit, we encourage you to check your APY Details page the day after your Eligible Direct Deposit posts to your SoFi account. If your APY is not showing as the APY for account holders with Eligible Direct Deposit, contact us at 855-456-7634 with the details of your Eligible Direct Deposit. As long as SoFi Bank can validate those details, you will start earning the APY for account holders with Eligible Direct Deposit from the date you contact SoFi for the next 31 calendar days. You will also be eligible for the APY for account holders with Eligible Direct Deposit on future Eligible Direct Deposits, as long as SoFi Bank can validate them.

Deposits that are not from an employer, payroll, or benefits provider or government agency, including but not limited to check deposits, peer-to-peer transfers (e.g., transfers from PayPal, Venmo, Wise, etc.), merchant transactions (e.g., transactions from PayPal, Stripe, Square, etc.), and bank ACH funds transfers and wire transfers from external accounts, or are non-recurring in nature (e.g., IRS tax refunds), do not constitute Eligible Direct Deposit activity. There is no minimum Eligible Direct Deposit amount required to qualify for the stated interest rate. SoFi Bank shall, in its sole discretion, assess each account holder's Eligible Direct Deposit activity to determine the applicability of rates and may request additional documentation for verification of eligibility.

See additional details at https://www.sofi.com/legal/banking-rate-sheet.
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SOBNK-Q225-042

One main reason for refinancing student loans with a private lender is to combine your loans into one new loan with a lower interest rate. If you get a lower interest rate, your monthly student loan payment will go down. You’ll also pay less interest over the life of the loan.

Here, learn more about steps to take to help get a lower interest rate on student loans.

Reduce Your Interest on Student Loans

Consolidating multiple student loan balances into one new refinance loan with a low interest rate can be ideal for those looking to reduce the amount they owe in interest and also lower their monthly loan payment. It’s important to note, though, that if you refinance federal student loans, you lose access to federal benefits such as income-driven repayment plans.

Getting approved for student loan refinancing isn’t just a matter of submitting an application. You need a game plan — one that will help you become a strong loan candidate, who’ll qualify for a lower student loan interest rate. Here are five strategies that may help.

5-Point Plan for Getting a Low Interest Rate

1. Check your credit.

If you want to reduce your student loan interest rate through refinancing, the first thing you should do is check your credit score. The stronger your credit profile, the less risky you appear to lenders. If your credit profile is solid — meaning you have a good credit score and a low debt-to-income ratio — lenders should offer you better rates.

If, however, your credit profile isn’t quite where you want it to be, that’s OK. Take a few months to build your credit and reapply for student loan refinancing down the line to see if you qualify for a better rate.

Recommended: Why Your Debt to Income Ratio Matters

2. Take a hard look at your cost of living.

Some cities are more expensive to live in than others. Someone renting an apartment in a small Midwestern town, for example, has lower living expenses than someone who owns a row home in San Francisco. Cost of living ties directly into your debt-to-income ratio, and therefore it matters when you want to get a lower interest rate on student loans.

To some extent, this is out of your hands; your zip code helps lenders determine your cost of living. But anything you can do to pay down debt, especially high-interest credit card debt, and make choices that free up more money — such as renting a smaller place, taking on a roommate, or leasing a cheaper car — can help your case.

3. Give lenders a complete history.

Some student loan refinancing lenders consider things like where you went to school and your position at work when they weigh your application. Provide as much information as you can when it comes to your undergraduate and graduate degrees.

Be sure to also include all relevant work experience. Again, if you can show lenders that you have a solid work history and your income has steadily increased, you will appear less risky. The less riskier you are to lenders, the better your student loan interest rate is likely to be.

If there’s a job offer on the horizon, be sure to submit your offer letter with your application. And if you get a promotion while your application is under review, notify the lender immediately. Finally, if you’re in line for a promotion that will positively affect your paycheck, wait until it happens before you apply.

4. Show all your income.

When lenders ask for income information, they mean all of your income, not just job earnings. List dividends, interest earned, bonuses, and the extra money you make from your side hustle or Airbnb rental property. As long as you can prove these income sources, it will all count toward your debt-to-income ratio and help to lower it. And again, the lower this ratio, the better chances you have at qualifying for a lower student loan refinance rate.

Also, make sure your driver’s license is current and that your student loan statements are all correct. If you’re self-employed, you may want to wait until you’ve filed your taxes to apply for refinancing — it’s one of the easiest ways to prove the previous year’s income.

5. Be flexible.

If you have a number of student loans and you’re not offered the best rate when you apply for refinancing, consider refinancing only a couple of them. You may get a lower interest rate with a smaller refinance balance. You can always apply for the full balance down the road after you’ve received a raise or moved to a less expensive location.

Being flexible also means you might want to think about asking a friend or relative for help if your application isn’t as strong as you’d like. When you refinance your student loans with a cosigner who has a good credit profile and low debt-to-income ratio, you may be able to get a lower rate than if you refinanced on your own.

Refinance Student Loans With SoFi

The stronger you are as a student loan refinancing candidate, the better your chances are of getting a lower student loan refinance rate. To get the lowest rate when refinancing, check your credit, take a close look at your living expenses and debt-to-income ratio, give lenders a complete history of your education and employment, make sure to include all of your income sources in the application, and finally, be flexible, even if that means applying with a cosigner.

Keep in mind, though, that if you choose to refinance your federal student loans with a private lender, you lose access to federal benefits, such as student loan forgiveness and income-driven repayment plans. Make sure you don’t plan on using these benefits now or at any point in the future before deciding to refinance.

If you do think a student loan refinance may be right for you, consider SoFi. SoFi offers competitive rates and does not charge origination fees. It takes just a few minutes to see your rates, and your credit score will not be affected when you prequalify.

FAQ

Can you negotiate your student loan interest rate?

Not necessarily. Interest rates are determined by both the market and your credit profile, leaving little room for negotiation. You could, however, present your lowest offer to another lender to see if they will match that.

How can I get a lower interest rate when refinancing my student loans?

Strategies to potentially get a lower interest rate when refinancing student loans include building your credit profile, having a reliable source of income, and making sure your debt-to-income ratio is low.

Is it possible to get lower rates when refinancing student loans?

Yes, it is possible to get a lower interest rate when refinancing student loans. Your student loan interest rate will generally depend on current market rates, your credit profile, and your debt-to-income ratio. A strong credit history and a lower debt-to-income ratio may help you get a lower rate.

SoFi Student Loan Refinance
Terms and conditions apply. SoFi Refinance Student Loans are private loans. When you refinance federal loans with a SoFi loan, YOU FORFEIT YOUR ELIGIBILITY FOR ALL FEDERAL LOAN BENEFITS, including all flexible federal repayment and forgiveness options that are or may become available to federal student loan borrowers including, but not limited to: Public Service Loan Forgiveness (PSLF), Income-Based Repayment, Income-Contingent Repayment, extended repayment plans, PAYE or SAVE. Lowest rates reserved for the most creditworthy borrowers. Learn more at SoFi.com/eligibility. SoFi Refinance Student Loans are originated by SoFi Bank, N.A. Member FDIC. NMLS #696891 (www.nmlsconsumeraccess.org).

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SoFi loans are originated by SoFi Bank, N.A., NMLS #696891 (Member FDIC). For additional product-specific legal and licensing information, see SoFi.com/legal. Equal Housing Lender.