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Rate Impact Calculator

See exactly how a rate change affects your monthly payment, annual costs, and total loan cost.

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If you have multiple loans at the same rate, enter the count to see total impact.

What Does a Rate Hike Mean for Your Business?

When the Federal Reserve raises or lowers interest rates, it makes headlines. But for small business owners, the real question is simpler: how does this affect my monthly payment?

How Interest Rate Changes Hit Your Bottom Line

Every loan payment is split between principal and interest. When rates go up, the interest portion grows, which means your total monthly payment increases, even though you borrowed the same amount. On a $250,000 loan with 10 years left, a 0.25% increase adds roughly $30-35 per month. That sounds small until you multiply it across 12 months, multiple loans, or a 20-year term.

Fixed vs Variable Rate Loans

If your loan has a fixed rate, a Fed rate hike does not change your current payment. It only matters when you refinance or take out new debt.

If your loan has a variable rate (common with SBA 7(a) loans and lines of credit), your payment adjusts periodically based on the prime rate. When the Fed moves, your payment follows, sometimes within 30-60 days.

Why Small Businesses Should Track Rate Changes

  • Cash flow planning: Even a small payment increase reduces the cash available for payroll, inventory, and growth.
  • Loan qualification: Higher rates reduce the loan amount you qualify for, since lenders look at your debt service coverage ratio (DSCR).
  • Refinancing decisions: If rates drop, refinancing could save thousands over the life of your loan. This calculator shows you exactly how much.
  • Multiple loans: Many small business owners carry 2-5 loans. A rate change that seems minor on one loan compounds across the portfolio.

How to Use This Calculator

  1. Enter your current loan balance and interest rate.
  2. Select how many years remain on the loan.
  3. Pick a rate change scenario, or enter a custom value.
  4. If you have multiple loans at similar rates, enter the count to see the combined impact.

The calculator shows you the monthly payment change, annual cost difference, and total lifetime difference so you can plan accordingly.

What to Do When Rates Rise

  • Review your variable-rate loans first. These are the ones that will hit your cash flow immediately.
  • Run your DSCR. Make sure your debt service coverage ratio stays above 1.25x at the new rate.
  • Build a cash buffer. If rates are trending up, set aside extra cash to absorb higher payments.
  • Consider locking in. If you have a variable-rate loan and rates are climbing, talk to your lender about converting to a fixed rate.

What This Means for Your Business

Interest rates are one of the few external forces that directly change your monthly expenses without your permission. A 1% rate increase on a $250,000 variable-rate loan adds roughly $2,500 to your annual costs. Across multiple loans, the impact compounds.

The businesses that handle rate changes well are the ones that model the impact before it hits. Use this calculator whenever the Fed signals a rate change, when you are considering new debt, or when evaluating whether to refinance existing loans.

Your rate exposure connects directly to your DSCR, your SBA loan payments, and your overall cash flow forecast. Run all three to see how rate changes ripple through your financial position.

Use the calculator above to see exactly what a rate change means for your business, then plan your next move.

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