How a College Professor Turned a Simple Calculator Into $10K a Year in Passive Income
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With $2,000, a few freelancers, and no coding skills, this professor built a tool that now earns $10K a year , almost entirely on autopilot.
Written by Ben Huber Last Updated: July 2, 2025Some of the links on DollarSprout point to products or services from partners we trust. If you choose to make a purchase through one, we may earn a commission, which supports the ongoing maintenance and improvement of our site at no additional cost to you. Learn more.
Benjamin Bailey was sitting at a café in Europe with his wife when his phone buzzed.
Ding. Another $50 payment had come through. Enough to cover lunch, maybe dinner too.
🧮 Side Hustle: Online pension calculator 💰 Revenue: $10K to $11K per year (mostly passive) 🗓️ Started: 2020Featured Quote:
“You’re not trying to be everything to everyone , you’re trying to do one thing clearly and reliably.”Bailey is a professor of communication at the University of Massachusetts Amherst. But a few years ago, he quietly launched a side hustle most people wouldn’t expect: a pension valuation calculator.
The site took him about 200 hours and $2,000 to create. Today, it brings in $10,000 to $11,000 a year in nearly passive income, without marketing, social media, or even regular upkeep.
“I didn’t write a single line of code,” he said. “I hired a couple of freelancers, used WordPress and PayPal, and just built something useful for a very specific audience.”
The best part? It still works. The tool runs almost entirely on autopilot, and Bailey believes anyone with a niche idea and the right help can do something similar.
Solving a $200 Divorce Problem with a $50 Tool
Bailey didn’t set out to build a business , he just wanted to help his wife work more efficiently.
“She’d be waiting weeks for actuaries to send back a pension value,” he said. “It was frustrating. And it held up the whole divorce process.”
As a divorce mediator, his wife frequently needed to calculate the present value of her clients’ pensions, an essential part of splitting assets. While dividing a 401(k) is straightforward, traditional pensions require more guesswork. They’re promises of future monthly payments, and figuring out what those are worth today typically means hiring an actuary.
“It cost about $200 every time,” Bailey said. “And the formulas were nowhere to be found , unless you knew where to look.”
He eventually found what he needed buried in an 800-page reference manual called Value of Pensions in Divorce. Once he understood the math, he realized there was no reason it couldn’t be automated.
“For most cases, people didn’t need a full actuarial report,” he said. “They just needed a reliable number to keep things moving.”
That became the foundation for ValueYourPension.com, a self-serve website that delivers pension valuations instantly. Users , typically family lawyers, accountants, or individuals navigating divorce , enter a few details and get a result in seconds.
Ben’s tools simplify complex pension math , just enter a few numbers, and get a clear result in seconds.No delays. No follow-ups or back-and-forth. And at $50 to $100 per use, no need for a $200 actuary.
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From Idea to Income , Without Coding a Line
Once Bailey understood the formulas behind pension valuations, he started thinking about how to turn them into something others could actually use.
“I started drafting everything in plain English , the inputs I needed, the outputs I wanted, and how the logic should flow,” he said. “Then I went looking for someone who could actually build it.”
He found a developer on Upwork , someone he’d worked with before on a simpler child support calculator , and hired him to create the pension tool. “He was based in Ukraine and really good with multi-step financial calculations,” Bailey said. “He even set up the PayPal integration for me.”
Bailey mapped out the logic in plain English, then hired a freelance developer to bring it to life. No coding needed.On the design side, Bailey brought in a second freelancer from India to create a basic WordPress layout. The rest of the site setup, the copywriting, SEO, and hosting, he figured out himself.
“I probably spent 200 hours on it overall,” he said. “It cost about $2,000 out of pocket, but that’s because I like to do things myself. If I had outsourced everything, it might’ve cost another $500 to $1,000, and taken way less time.”
Still, he doesn’t regret doing it the slow way.
“I treated it like a hobby,” he said. “It kept my mind busy, and I liked having full control over the process.”
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How Much It Earns , and What It Takes to Maintain
So, how much does it make, and how much work is involved?
These days, Bailey spends about two hours a month on the business, mostly just keeping WordPress updated and responding to the occasional email.
“The calculator gets used around four times a week for paid calculations,” he said. The free version offers a rough estimate, which lets you users preview the value before paying for a full calculation. “The free estimator version probably gets dozens of uses a day.”
Each paid use brings in $50 to $100, depending on the complexity of the request.
With no ads or promotion, the tool earns $10K a year in steady payments, all while running quietly in the background.That adds up to about $10,000 to $11,000 a year , income that’s continued steadily for the past few years, with only $200 to $300 a year in hosting and maintenance costs.
“There are weeks when nothing happens, and I start to wonder if the site’s broken,” he said. “Then suddenly there’s a rush of uses and it pays for itself all over again.”
There’s no advertising. No active promotion. No email list, social media presence, or ongoing content strategy. The site just quietly ranks in Google for a problem few people know how to solve, and delivers value on demand.
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How to Build a Tool Like This (Even If You’re Not Technical)
Bailey’s story isn’t just about pensions; it’s about spotting a bottleneck and solving it with something simple, scalable, and simple to use.
The calculator doesn’t just save time , it still earns thank-you notes from users who rely on it in their work.“If you can come up with an online service, there’s potentially a huge market out there,” he said. “You build it once, and it can keep earning for years.”
The most key part, he said, isn’t technical skill , it’s having a clear understanding of the problem you want to solve. Everything else can be outsourced.
“All the expertise you need is on Upwork,” Bailey said. “You can find developers, designers, SEO people, all of it. If you work with freelancers in Eastern Europe or South Asia, your costs stay low. Sometimes there’s a bit of a language barrier, but it’s totally manageable.”
He encourages anyone with niche knowledge to think about what kinds of calculators, tools, or workflows people in their industry are doing manually, and whether those could be automated or packaged into a simple web product.
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Final Thoughts
Before you check out, double-check college professor turned simple against current offers and any coupons you can stack. Small habits like this add up to real savings over a year.
Originally published at dollarsprout.com.
Ben Huber
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