Opportunity cost — the side of the trade with no number
Delay is the only option that never quotes a price.
One side of the trade arrives with a figure attached. The other never does. Price the wait, then
see why waiting looks free.
$328
$10 a month for 48 months, less the $152 you paid.
$319
44 months, less a discounted $121. The wait cost $9.
The Cost of Waiting
Waiting for a discount feels free. It is not: every month you wait, the thing you are delaying is not earning, and compounding you never started does not start. This tool prices the wait - risk-adjusted, not best-case.
The cost of waiting
Find out whether waiting for a discount is actually a trap.
A blunt success probability. The best-case profit is discounted by it so the comparison is risk-adjusted, not a fantasy of the upside.
0 means a certain loss, 100 a sure thing. Be honest - most real ventures sit well under 50.
Name it, then Save to keep it in the dropdown above for next time. Editing any field switches you to Custom.
Unlock the investing view
See exactly how much compound growth you give up by waiting to invest. This tab is part of the paid tool.
An assumption, not a promise. Returns are never guaranteed and past performance does not predict the future.
Name it, then Save to keep it in the dropdown above for next time. Editing any field switches you to Custom.
Net result over time
Adjust the inputs to see the real cost of waiting.
Educational content only - not financial advice. Every figure here is arithmetic on the assumptions you entered, not a forecast and not a recommendation. Investment returns are never guaranteed.
Delay is the only option that never quotes a price.
Someone shows you a number. Wait four months and it is thirty-one dollars cheaper. The saving is specific, dated and certain, which is exactly what makes it persuasive.
You weigh thirty-one dollars against nothing, because the other side of the trade has no number attached to it. Nobody quotes you the cost of the four months.
Waiting wins every time it is scored this way — not because it is right, but because only one side was counted. The decision was never actually close.
The problem is not that people are impatient. It is the opposite. Waiting is the default, and the default rarely gets audited.
A discount arrives pre-quantified. It comes with a figure, a deadline and a comparison already done for you. The cost of the delay arrives as nothing at all — no invoice, no line item, no moment where you are asked to approve it. So one side of the decision is a hard number and the other is a shrug, and a hard number beats a shrug regardless of which is larger.
Every month you spend waiting is a month the thing was not running. That is not a feeling. It is a quantity, and it can be estimated.
This is not an argument for acting fast. Plenty of delays are correct, and this tool will tell you so — on its own default settings the discount genuinely wins. What it will not do is let the waiting side stay blank. Both columns get a number, then you decide.
The honest version of the question is not “should I wait?” It is “the delay costs roughly this much — is the discount bigger than that?” Most people have never seen the first figure, so they have never actually answered the second.
Nothing here is hidden. Check every step.
This is the example from the top of the page with the working shown, then the same question asked about money instead of a venture. If a number here disagreed with the calculator below, the calculator would be wrong — they come from the same engine.
Discount the upside. A best-case $50 a month at a 20% success rate is an expected $10 a month.
Run the full horizon. $10 × 48 months, less the $152 you paid, is $328.
Run the delayed one. $10 × 44 months, less the discounted $121, is $319.
Subtract. $328 − $319 is $9 — the expected value the four months cost you.
● expected_value()
| Line | Acting now | Waiting four months |
|---|---|---|
| Expected monthly profit | $10.00 | $10.00 |
| Months it runs | 48 | 44 |
| Expected profit over the horizon | $480.00 | $440.00 |
| Cost paid | $152.00 | $121.00 |
| Net expected value | $328.00 | $319.00 |
| Cost of waiting | $9.00 — so the $31 discount is really worth $22 | |
Waiting wins this one. That is the correct answer and the tool says so plainly — it is not built to push you one way. What changed is that the discount is now being compared against a number instead of against nothing. Push the monthly profit up, or the success rate, and the verdict flips; the tool will say that too.
● cost_of_hesitation()
| Scenario | Start now | After the delay | Cost of waiting |
|---|---|---|---|
| Wait one year for a crash · 20 yr | $343,778.24 | $311,683.68 | $32,094.55 |
| Delay a Roth by one year · 30 yr | $745,179.72 | $682,322.34 | $62,857.38 |
| Start at 35 instead of 30 · 30 yr | $678,146.38 | $398,050.02 | $280,096.36 |
Same question, different units. The first row is $10,000 already invested plus $500 a month at 8% over twenty years — one year of hesitation costs thirty-two thousand dollars, because the year you skip is not the first year, it is the last one, and the last one is the largest. The third row is the same arithmetic asked about five years instead of one, and it is why “I will start when things settle down” is the most expensive sentence on this page. This tab is part of the paid tool; its compute runs on the server, so these are worked figures rather than something you can reproduce here for free.
The delay is not charged to you. It is deducted from you, at the far end, where nobody is looking.
Both tabs answer the same question and neither of them tells you what to do. One prices a delay in expected profit; the other prices it in compound growth. The verdict is arithmetic, not advice — and on the settings this page ships with, the arithmetic disagrees with itself: waiting is right in the first table and expensive in the second. That is the honest outcome, and it is why the tool reports rather than recommends.
Four inputs. No account, no email, no upload.
The free tab runs entirely in the page, on live sliders, with no round-trip to a server — your figures never leave your browser. There is no signup and nothing to attach them to. Scenarios you choose to save are kept in your own browser’s storage, on your own device, never on this site.
Name the delay
What it costs now, what it costs if you wait, and how many months the waiting takes. Start from a preset or type your own.
Estimate the upside
Best-case profit per month if the thing works. Be optimistic here on purpose — the next step is what keeps it honest.
Discount it for risk
Pick the kind of venture. A niche blog carries a different success rate than consulting with skills you already have, and the tool prices that difference.
Read both columns
Acting now against waiting, with the gap between them named. Drag a slider and watch the verdict move in real time.
The risk discount is the part that does the work. Anyone can talk themselves into a delay by quoting the best case at full price on both sides of the comparison, and anyone can talk themselves out of one the same way. Multiplying the upside by a blunt success rate before anything else happens means the optimism is priced once, at the start, where you can see it.
You can override the rate. If you think your odds are better than the category, type your own number and the whole model moves with it — which is the point. It is a calibration instrument. It is only as good as the estimate you feed it, and it shows you exactly which estimate is carrying the answer.
Most complaints about this tool are correct.
Here are the four that come up, answered honestly rather than deflected. If one of them is a dealbreaker for you, it should be.
“You made the success rate up.”
The categories are blunt round numbers, and they are labelled as blunt round numbers. Twenty percent for a niche blog is not a measured statistic about your blog — it is a starting point you are supposed to argue with.
That is why the field is editable. Type the rate you actually believe and the model recalculates around it. The tool’s job is to make the assumption visible and adjustable, not to pretend it knows your odds.
“Expected value is the wrong frame for one decision.”
This is the strongest objection on the page and it is largely right. Expected value describes the average of many repetitions. You are making this decision once. A twenty percent shot does not pay out twenty percent — it pays out fully or not at all.
What the number is good for is comparison, not prophecy. It gives the waiting side a magnitude so it stops being scored as zero. Treat it as a unit of measurement, not a forecast.
“Some delays are obviously correct.”
Yes, and the tool agrees. On the settings it loads with, waiting wins — the discount is worth more than the four months cost. That result was not engineered to be flattering; it is what the default preset returns.
A tool that always concluded “act now” would be a sales pitch with a calculator on it. This one changes its answer when the inputs change, which is the only reason to trust it when it does say the delay is expensive.
“This is just pressure dressed up as arithmetic.”
It would be, if it hid its working. Every figure on this page shows the steps that produced it, the assumptions are on screen and editable, and nothing here recommends a course of action.
There is also no countdown, no scarcity, and nothing to buy on this page. If the honest read of your own numbers is that waiting is fine, that is a perfectly good outcome and you can close the tab.
Built for people who already run the numbers.
This is a calibration instrument, not a productivity app and not a lecture about procrastination. It suits a particular kind of person and is genuinely useless to everyone else.
It fits if
- You have something specific you have been putting off, and you can put a number and a date on both sides of it.
- You are comfortable being asked for an honest estimate of your own odds, and revising it downward when the answer looks too good.
- You want the delay priced rather than judged — a magnitude, not a verdict about your character.
- You already think in expected value, compounding and opportunity cost, and want the arithmetic done consistently instead of in your head.
- You will accept an answer you did not want, including “the discount wins, go ahead and wait”.
It does not fit if
- You want to be told what to do. This reports two numbers and stops; the decision stays yours.
- The delay is not really about money — capacity, health, or a decision that is not yours to make alone will not show up in this model.
- You are looking for motivation. An honest number is a poor substitute for wanting the thing, and this tool will not manufacture urgency.
- You need precision. These are blunt estimates compounded forward; treat the output as an order of magnitude, never a prediction.
- You would use the output to justify a purchase you had already decided on. It will happily do that, and you will have learned nothing.
If none of that describes you, this is not your tool and there is nothing to sign up for anyway. No hard feelings.
What the cost of waiting actually prices.
Answered against what the tool actually does, not against what would be convenient to claim.
What is the opportunity cost of waiting?
It is what the delay earns you, set against what the delay costs you. Waiting for a discount has an obvious benefit — you pay less — and a hidden cost: every month the thing is not working for you is a month of whatever it would have produced.
Most people only price the first half, because the saving is printed on a page and the foregone months are not. This tool puts both on screen at once and names the gap between them. Sometimes waiting wins comfortably. Sometimes a $200 saving costs $1,200 in delayed profit, and that is the case worth catching.
Is it worth waiting for a sale or a discount?
It depends entirely on whether the thing earns while you own it, and that is the question the tool is built around. A laptop you use for paid work is a different decision from a laptop you use for browsing, even at the identical discount.
The rough test: if the item produces nothing, waiting for a discount is close to free and you should usually wait. If it produces something, the discount has to beat the profit you postpone — and over a few months that is a higher bar than most sales clear. Run both and the answer stops being a matter of temperament.
How does the success probability work?
You enter a best-case monthly profit, then choose what kind of venture it is — guaranteed return, freelancing with skills you already have, e-commerce or local services, content, a tech startup, or a genuine moonshot — and the tool discounts that best case by a success rate before anything else happens.
That ordering is the point. Anyone can justify a delay by quoting the best case at full price, and anyone can justify rushing the same way. Pricing the optimism once, at the start, where you can see it, is what stops the rest of the model from quietly inheriting it. You can override the rate with your own number if you think your odds beat the category.
How long a delay can I model?
Between one and twenty-four months, with best-case monthly profit up to $2,000 and a success probability anywhere from 0 to 100%. Those are the ranges the controls actually reach.
Twenty-four months is a deliberate ceiling rather than a technical one. Past two years the estimate of what a venture would have earned per month stops being an estimate and becomes a story, and a tool that let you compound a guess over ten years would be lending it a precision it has not got.
What is free and what is Pro?
The Life and Business view is free, for everyone, always — that is the view that costs a delay in months of foregone profit, and for most decisions it is the whole answer.
Pro unlocks the Finance and Investing view: exactly how much compound growth you give up by waiting, rather than only what the wait costs in profit. It is one purchase, $29, not a subscription. If costing the wait in months of profit already settled it, you do not need Pro.
Is my data saved or sent anywhere?
There is no account, no email gate and no sign-up. The free Life and Business view runs entirely in your browser — your figures are never sent to this site at all, and nothing you enter is written to a database or passed to any third party.
One thing here does get stored, and it is worth being exact about it. Scenarios you choose to save are kept in your own browser’s local storage, on your own device — that is how they are still there when you come back. They never reach this site and nobody else can see them. Clear your browser data and they are gone for good, because there is no copy anywhere else.
Everything above stays free. Pro goes further.
Pro unlocks the investing view: exactly how much compound growth you give up by waiting, rather than only what the wait costs in profit.
Paid once. Not a subscription, not a bundle.
The life-and-business view is free, for everyone, always. If costing the wait in months of profit already answered it, you do not need this. Educational content only — not financial advice.