In this article
A reference you can use while doing the work
We went through the pain of this so you don’t have to. Here is the plain-English version, with a practical example for every term.
Your first income experiment does not need an elaborate dashboard. It does need a clear offer, a record of what people do, and an honest count of the money and time involved. These terms help you tell the difference between being busy, making a sale, and building something worth continuing.
About the numbers: these are hypothetical teaching examples, not business results or recommended targets. Dollar amounts use USD for illustration.
1. Shape a small experiment
Niche
A focused audience or problem that makes your offer easier to explain and test.
Example: You offer photo organization for families moving house, rather than general digital help for everyone.
Offer
The specific outcome, deliverable, scope, price and next step a buyer can evaluate.
Example: “Organize up to 500 photos into dated folders for $150, with one review call” is an offer; “I help with computers” is a category.
MVP — minimum viable product
The smallest usable version that tests a key assumption while delivering what you promise.
Example: Manually prepare three paid photo-organizing jobs before building an upload portal.
Demand test
A bounded attempt to see whether relevant people take a meaningful action.
Example: Show a clear offer to 15 appropriate prospects and record questions, bookings and payments instead of counting compliments alone.
Lead and qualified lead
A lead expresses interest; a qualified lead meets your stated fit criteria.
Example: Six people ask about photo help. Four have the right file type, manageable volume and a suitable deadline.
Conversion rate
Completed actions divided by the eligible people or visits you chose to measure.
Example: Two buyers from 100 eligible visits = 2% visit-to-buyer conversion. Two buyers from ten enquiries = 20% enquiry conversion.
AOV — average order value
Revenue under your stated order definition divided by orders. It measures orders, not unique customers.
Example: $600 net sales across four orders = $150 AOV. A repeat buyer may place more than one order.
Opportunity cost
The best alternative use of the time or money you commit.
Example: A Saturday spent rebuilding your site cannot also be spent testing an offer with five likely buyers.
2. Count money and time honestly
Gross sales and net sales
Gross sales are sales before deductions; net sales deduct discounts, returns and allowances. Keep taxes collected separate.
Example: $500 gross sales − $50 discounts − $25 returns = $425 net sales, excluding sales tax.
Direct cost
A cost that can be traced to delivering a particular job or product. Direct does not always mean variable.
Example: The $40 photo-drive supplied for a customer’s project is a direct cost of that job.
Variable cost
A cost that changes with output or transactions. State what you include.
Example: A $3 packaging cost for each shipped product becomes $30 when you ship ten products.
Fixed cost
A cost that does not change with small changes in volume over the period being reviewed.
Example: A $30 monthly website subscription costs the same whether you make zero or five sales that month.
Contribution
Sales less variable costs. This amount helps cover fixed costs and, afterward, profit.
Example: A $50 product with $20 variable costs contributes $30 before fixed costs, acquisition and tax.
Gross margin versus markup
Margin divides gross profit by selling price; markup divides it by cost. They use different denominators.
Example: A $100 sale with $50 cost has $50 gross profit: 50% gross margin and 100% markup on cost.
Net profit
Revenue after all recognized business expenses. State whether the figure is before or after tax and owner compensation.
Example: $1,000 revenue − $300 direct costs − $200 other expenses = $500 before-tax profit if those are all business expenses.
Effective hourly earnings
Money remaining under a stated cost definition divided by all hours worked, including selling and administration.
Example: $180 remaining before tax and owner pay ÷ six total hours = $30 an hour. Counting only three delivery hours would overstate it.
3. Decide whether the idea can keep working
Break-even volume
The number of units needed to cover a specified fixed-cost total at the expected contribution per unit.
Example: $120 monthly fixed costs ÷ $30 contribution per sale = four sales to break even before tax and any omitted owner labor.
Cash flow
Cash actually received minus cash actually paid during the period. It differs from earned revenue and profit.
Example: You receive $300 deposits and pay $400 for supplies this week: cash flow is −$100 even if future jobs look promising.
Working capital
Current assets minus current liabilities: a measure of resources tied up in short-term operations. It is not all spendable cash.
Example: $500 cash + $200 receivables + $100 inventory − $250 short-term bills = $550 working capital.
CAC — customer acquisition cost
Acquisition spending and included selling effort divided by new customers. Separate a cash-only version from a fully costed version.
Example: $100 advertising plus $100 allocated outreach time ÷ four new buyers = $50 CAC. Cash-only ad cost is $25 per buyer.
LTV — customer lifetime value
Estimated revenue or contribution across a customer relationship. Early observed repeat buying is better evidence than a guessed lifetime.
Example: A buyer expected to place three $80 orders has $240 modeled revenue LTV. At 50% contribution, that is $120 before acquisition.
Repeat purchase rate
Customers with at least two purchases divided by customers in the defined group and period. Let the group have time to repeat.
Example: Six of 20 customers make a second purchase within 90 days: 30% repeat purchase rate for that cohort.
Cohort
People grouped by a shared start event so their progress can be compared fairly.
Example: Track your first ten October buyers for 90 days, then compare them with November buyers after the same 90-day window.
ROI — return on investment
The gain after the included investment cost, divided by that investment. Define which benefit and costs you count.
Example: A project generates $600 revenue and has $400 total included cost: ($600 − $400) ÷ $400 = 50% ROI on that basis.
4. Extend the business without collecting software
Upsell and cross-sell
An upsell offers a more valuable version; a cross-sell offers a useful complementary item. Both should fit the buyer’s need.
Example: A 1,000-photo package upgrades a 500-photo job; an optional backup drive complements it. Neither is automatically extra profit.
Affiliate commission
Compensation for qualifying referred activity under a program’s rules. Pending commissions are not the same as settled cash.
Example: A $100 qualifying sale at 10% commission earns $10 if approved and not reversed. Disclose the commercial relationship near recommendations.
App or plugin
An extension that adds a capability to an existing platform. It does not repair an unclear offer by itself.
Example: A booking plugin can let people request a slot on your current site without building an entire customer portal.
Integration and automation
An integration connects tools; an automation runs a configured process. The supported trigger and action matter.
Example: A confirmed paid booking creates a delivery task. Test that a cancellation does not leave an unwanted task behind.
AI agent
An AI system able to choose and perform steps using permitted tools. Give it a narrow job and review the result.
Example: An agent groups anonymized enquiry questions and drafts an FAQ. You check the answers before publishing.
TCO — total cost of ownership
The full tool cost, including subscriptions, setup time, usage, maintenance and switching.
Example: A $25 app plus two hours of setup valued at $30 costs $85 in the first month before other charges.
See the concepts work together
Worked example · calculation steps
A $250 job is not $250 of take-home pay
Worked example · calculation steps
Four sales cover this month’s fixed costs
Worked example · common scale
Small numbers still need the right denominator
Use an app marketplace to fill one real gap
An app marketplace is a directory of extensions for a particular platform. It can help you add a missing capability to your current site or workflow. Start with the customer’s stuck step and the metric you expect to change, then search for the capability.
| Need | What to investigate |
|---|---|
| Your first customers need a simple way to book or buy | Look for booking, digital delivery, invoicing or payment capabilities that fit your existing site. Test the purchase and cancellation path before adding more features. |
| Where to look | Browse WordPress plugins, WooCommerce extensions or the Shopify App Store, depending on the platform you actually use. |
- Name the job. Write one sentence: “When this event happens, this person needs this useful next step.” Check whether your current plan already supports it.
- Compare two or three candidates. Check the required plan, current fees and usage limits, recent maintenance, support, permissions, supported data fields and cancellation terms.
- Calculate the full cost. Include setup and maintenance. A $60 monthly app needs three genuinely additional sales at $20 contribution per sale to cover its fee. With $120 setup, the first month needs nine such sales. Sales merely credited to the app are not necessarily additional.
- Test a complete journey. Use a safe test account or draft environment. Check success, failure, cancellation and duplicate events; verify mobile behavior and what happens after uninstalling.
- Keep or remove it on evidence. Record a baseline, an owner and a review date. Measure contribution, reliability or usable time saved. Hours freed are capacity until you actually turn them into value.
Directory links are ordinary official links. Availability, compatibility and pricing can change; verify the listing before installing. An app recommendation should explain fit and trade-offs rather than treating every popular extension as essential.
Give an AI agent a useful, reviewable job
Ask an agent to reconcile definitions, check arithmetic, research app capabilities, classify anonymized feedback or draft a weekly review. Provide the source records and your cost definitions. Keep purchases, live installations, customer messages and budget changes subject to the permissions you explicitly grant.
Help me review this side-hustle experiment. Separate sales, cash received, direct costs, fixed costs and total hours. Show contribution, break-even sales and effective hourly earnings with formulas. Label assumptions and missing data. Suggest one small change to test next without inventing demand or promising earnings.
Check the result against the original records. A polished explanation is not proof that the data is complete or that the proposed change will work.
Put five terms to work this week
- Choose one decision. What are you trying to improve or learn?
- Select five measures at most. Define the event, denominator, time window, costs and source for each.
- Calculate one real example. Reconcile it with an order, customer, invoice or observed task.
- Make one bounded change. Record the hypothesis, owner, cost limit and review date.
- Review the evidence. Continue, revise or stop. Record uncertainty and customer feedback alongside the numbers.
Put five numbers into the First Experiment Planner: relevant conversations, buyers, cash received, costs and total hours. Then read marketing numbers for a side hustle. If you need help turning the test into a repeatable process, explore practical AI help and working sessions.
Definitions and further reading
Numerical examples, graphics and exercises in this guide are original hypothetical teaching scenarios. They are not client results, industry benchmarks or forecasts. Different examples are independent unless explicitly connected. For platform-specific reporting definitions, consult Google Ads on CTR and Shopify on customer lifetime value. Report your own cost scope and observed cohort horizon alongside any simplified LTV model. Official marketplace directories were checked November 2, 2026.
Your next move
Choose one income idea and record enquiries, buyers, cash received, costs and total hours. Use those facts to decide whether to continue, change or pause.
