Rex says
Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.
Try a scenario
Click to load — tweak from there.Inputs
Result
Payback period (years)
0.86
Net gain over the benefit period
$60,000
Return on investment
833%
True cost including your time
$7,200.00
Probability-weighted annual raise
$8,400.00
Opportunity cost of study time
$2,700.00
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One click, a permanent link with your numbers baked in.
How to use this
- 1Enter tuition and materials ($).
- 2Enter study hours required.
- 3Enter value of your time ($/hr).
- 4Enter expected salary increase ($/yr).
- 5Enter probability it lands the raise (%).
- 6Enter years the benefit lasts.
- 7Enter employer reimbursement (%).
- 8Read your payback period (years) on the right — it updates as you type.
- 9Hit Share to keep the scenario or send it to someone.
About this calculator
The honest math includes lost income during study time. A $12,000 program that takes 300 unpaid hours has a real cost well above its tuition.
Worked example
Using the values the calculator loads with:
Inputs
- Tuition and materials: 4500 $
- Study hours required: 180
- Value of your time: 30 $/hr
- Expected salary increase: 12000 $/yr
- Probability it lands the raise: 70 %
- Years the benefit lasts: 8
- Employer reimbursement: 0 %
Results
- Payback period (years): 0.86
- Net gain over the benefit period: $60,000.00
- Return on investment: 833%
- True cost including your time: $7,200.00
- Probability-weighted annual raise: $8,400.00
- Opportunity cost of study time: $2,700.00
What each field means
Inputs
- Tuition and materials ($)
- The tuition and materials used in the calculation, measured in $. Starts at 4500 $ so you have a working example on load.
- Study hours required
- The study hours required used in the calculation. Starts at 180 so you have a working example on load.
- Value of your time ($/hr)
- The value of your time used in the calculation, measured in $/hr. Starts at 30 $/hr so you have a working example on load.
- Expected salary increase ($/yr)
- The expected salary increase used in the calculation, measured in $/yr. Starts at 12000 $/yr so you have a working example on load.
- Probability it lands the raise (%)
- The probability it lands the raise used in the calculation, measured in %. Starts at 70 % so you have a working example on load. Accepted range: 0–100 %.
- Years the benefit lasts
- The years the benefit lasts used in the calculation. Starts at 8 so you have a working example on load. Accepted range: 1–30.
- Employer reimbursement (%)
- The employer reimbursement used in the calculation, measured in %. Starts at 0 % so you have a working example on load. Accepted range: 0–100 %.
Results
- Payback period (years)
- Returned as a decimal number and shown as the headline result. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Net gain over the benefit period
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Return on investment
- Returned as a percentage. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- True cost including your time
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Probability-weighted annual raise
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
- Opportunity cost of study time
- Returned as a money amount in US dollars. It recalculates instantly whenever you change an input, so you can compare scenarios without reloading.
FAQ
How does the certification & course roi calculator work?
The honest math includes lost income during study time. A $12,000 program that takes 300 unpaid hours has a real cost well above its tuition. The underlying maths is: Payback = (Tuition + opportunity cost) ÷ annual salary increase.
What do I need to enter?
7 values: tuition and materials, study hours required, value of your time, expected salary increase, probability it lands the raise, years the benefit lasts, and employer reimbursement. Each field starts with a sensible default, so you can change one number at a time and watch the result move.
What does the payback period (years) result mean?
It is returned as a decimal number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds.
Is this calculator free, and do I need an account?
Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser.
How accurate is the result?
It applies the standard formula exactly, so the arithmetic is precise. Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
Who is this tool for?
It's built for anyone comparing money scenarios before committing — budgeting a payment, sanity-checking a quote, or seeing what a change in rate or term actually costs.
Accuracy and limitations
- Results are estimates before tax, fees, and inflation unless an input explicitly covers them.
- Rates are treated as fixed for the whole period — variable-rate products will drift from this projection.
- This is educational maths, not financial advice. Check anything contractual with the lender or your accountant.
Related tools
Cite this calculator
Writing about this topic? Grab a citation — every link helps keep these tools free.
RevenueLab. (2026). Certification ROI Calculator. Retrieved from https://www.revenuelab.fyi/toolbox/certification-roi
<p>Source: <a href="https://www.revenuelab.fyi/toolbox/certification-roi" target="_blank" rel="noopener">Certification ROI Calculator — RevenueLab</a> (2026).</p>
Source: [Certification ROI Calculator — RevenueLab](https://www.revenuelab.fyi/toolbox/certification-roi) (2026).