Excel University Blog

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Functions

APR vs APY in Excel: What the EFFECT Function Reveals

By Jeff Lenning | July 8, 2025 |

When evaluating loans or investments, we’re often presented with a nominal interest rate commonly known as the APR (Annual Percentage Rate). But what we really care about is how much we’ll actually earn or pay over time, and that’s where the effective annual rate (APY) comes in. Fortunately, Excel offers the EFFECT function to convert…

Cumulative Interest Payment

By Jeff Lenning | July 1, 2025 |

When it comes to understanding the full cost of a loan, knowing just the monthly payment isn’t enough as the interest paid over time can be significant. That’s where Excel’s powerful CUMIPMT function comes into play. In this post, we’ll walk step-by-step through how to calculate cumulative interest over a given loan period and explore…

Cumulative Principal CUMPRINC

By Jeff Lenning | June 25, 2025 |

Understanding the principal portion of your loan payments over time is a key step in financial modeling and reporting. Fortunately, Excel makes this process easy with the CUMPRINC function. In this blog post, we’ll take a detailed look at how the CUMPRINC function works, build a cumulative principal schedule, and ultimately construct a simple dynamic…

Interest Payment IPMT

By Jeff Lenning | June 17, 2025 |

If you’re managing loans or curious about how much interest you’re paying each month, Excel’s IPMT function is here to help. In this post, we’ll not only explore how the function works, but we’ll also take it further by building a fully dynamic loan amortization schedule—one that updates automatically when you change any loan inputs.…

PPMT Explained: Dynamic Loan Schedule

By Jeff Lenning | June 10, 2025 |

Managing loans and tracking monthly payments just got a whole lot easier. In this tutorial, we’ll explore the PPMT function in Excel—a lesser-known but incredibly powerful function that calculates the principal portion of a loan payment for a specific period. Even better, we’ll show how to transform this function into a fully dynamic loan amortization…

Use FV Like a Crystal Ball

By Jeff Lenning | May 20, 2025 |

Imagine having a financial crystal ball—something that gives us a glimpse into how our money could grow into the future. That’s exactly what Excel’s FV (Future Value) function offers. Whether we’re saving for retirement, planning an investment, or just trying to hit a savings goal, FV gives us the power to explore different scenarios and…

PV: Value Your Money Now

By Jeff Lenning | May 6, 2025 |

Understanding the concept of present value can be one element in our financial decision making process. From evaluating loans and subscriptions to complex financial instruments like reverse mortgages, Excel’s PV function provides an accessible, effective tool for comparing future payments in today’s dollars. In this post, we’ll explore how to use the Excel PV function…

RATE: Find Your Interest Rate

By Jeff Lenning | April 29, 2025 |

Understanding how to calculate interest rates is crucial for financial planning. Whether you’re determining the interest rate for a loan or projecting your investment growth, Excel’s RATE function is a powerful tool. In this post, we’ll explore how to use the RATE function to unlock hidden financial insights, covering loans, balloon payments, and investment goals.…

NPER: Time Your Payoff

By Jeff Lenning | April 22, 2025 |

Managing finances effectively often requires understanding how long it will take to pay off a loan or reach a savings goal. Excel’s NPER function helps us determine the number of periods needed based on interest rate, payments, and loan amounts. Whether we’re looking at loans, mortgages, or investments, this function is crucial for financial planning.…

How to Become a Millionaire with this Simple Formula (PMT)

By Jeff Lenning | April 15, 2025 |

Ever wondered how much you need to save each month to reach a financial goal, like becoming a millionaire? The PMT function in Excel can help you calculate that with just a few simple inputs. While the PMT function is traditionally used to calculate loan payments, we can also use it to determine how much…