Zero Investment Business Calculator — Runway, Break-Even & Your Real Starting Number

"Zero investment" is a useful lie — here is the honest version

Search for businesses you can start with no money and you will find thousands of listicles promising exactly that. Almost none of them are lying about the opportunity — freelancing, print-on-demand, reselling, home food, online shops genuinely can start without investors, loans or a shop lease. What they skip is the arithmetic. A trade licence costs money. So does first stock, a domain, the boosting budget that gets your first hundred customers, and — most of all — the months of your own living costs while the business is too young to feed you. "Zero investment" really means lowest-possible cash, with your time as the main capital. This calculator exists to put an honest number on the cash part, so the plan in your head meets the plan your savings can survive.

The four numbers that decide whether the plan survives

Everything on this page reduces to four figures. One-time startup costs are what leaves your savings before the first sale: licences, equipment, first stock, setup. Monthly need is the business's monthly running costs plus your own living costs — the full amount revenue must eventually cover every month. Runway is how long your cash survives at that need: (savings − one-time costs) ÷ monthly need. And break-even volume is the sales level where contribution margin (price − direct cost per unit) finally covers the monthly need: monthly need ÷ margin. A plan is only believable when all four agree: break-even must be reachable, and the runway must be long enough to reach it.

From those, the calculator builds two headline figures. The bare minimum to open is one-time costs plus a single month of need — opening with less means the business is borrowing from your essentials within weeks. The recommended capital is one-time costs plus your chosen runway of monthly need (six months is the common advice) plus a contingency buffer, because first-time founders routinely underestimate costs by around a third. The gap between the recommended figure and your savings is the single most useful number on the page: it is either zero, or it is the amount of risk you are choosing to carry.

Worked example: a Facebook-commerce shop in Dhaka

The default preset loads this exact plan. One-time costs of BDT 85,000 (trade licence 5,000, website and domain 10,000, branding 5,000, first stock 50,000, packaging 5,000, photo gear 10,000). Monthly running costs of BDT 20,000 (ads 10,000, internet 2,000, packaging 3,000, a part-time helper 5,000), plus the owner's living costs of BDT 25,000 — a monthly need of BDT 45,000. Funding six months of that need takes BDT 270,000; with a 10% contingency the recommended capital is BDT 390,500. Against savings of BDT 200,000, the verdict is deliberately unglamorous: you can open (the bare minimum is BDT 130,000), but your savings runway is only 2.6 months, not six.

The selling side shows why the projection matters. At a BDT 800 average order and BDT 500 direct cost, the margin is BDT 300 per order, so break-even is 150 orders a month. Starting at 60 orders and growing an assumed 20% a month, the plan turns its first monthly profit in month 7 and pays back the setup costs by month 12 — but the cash balance bottoms out at BDT 23,739 in month 6, one month before the profit arrives. That gap between "profitable in month 7" and "nearly broke in month 6" is exactly where underfunded businesses die, and it is invisible in any calculator that only shows totals. Slow the growth assumption to 10% and the same plan runs out of cash in month 5 — try it above.

Why your living costs sit inside the break-even

The most common planning error in bootstrapped businesses is treating the founder as free. A shop whose revenue covers rent, stock and ads but not the owner's food and rent is not breaking even — it is slowly consuming the owner. That is why this calculator puts your personal monthly costs inside the monthly need from the start, the same convention used by serious break-even tools for owner-operated businesses. It makes the break-even volume higher and less flattering. It also makes it true. If the resulting number looks impossible, the honest levers are the ones the verdict names: a higher price, a lower per-unit cost, more starting sales, lower costs — or a later start with more savings behind it.

About the Bangladesh presets

The four presets are starting points built from typical Dhaka price levels — what a trade licence, a basic website, a first boosting budget or a month of delivery-partner costs usually run to. They are deliberately mid-range, and they are not quotes: your supplier, your city and your negotiation will move every line, which is why each one stays editable and why the tool keeps your own lines when you switch currency or copy the plan. Use a preset to get the shape of the plan in thirty seconds; then replace its numbers with your real ones before you believe any of the outputs. If your business does not resemble any preset — a tuition service, a tailoring shop, a small workshop — the blank plan gives you empty lines and the same maths.

Five mistakes this calculator is built to catch

Forgetting yourself. Covered above — if the plan does not feed you, it is not a plan. Mixing cost types. Stock for one order is a per-unit cost; the boosting budget is a monthly cost. Putting per-unit costs in the monthly list inflates break-even and hides your real margin. Growth fantasy. The projection grows at the rate you type. Set it to 0% and see whether the plan survives standing still — if it only works at 30% monthly growth, it does not work. Zero contingency. Licences take longer, stock arrives damaged, ads cost more in Eid season. The buffer is not pessimism; it is the average experience. Confusing profit with cash. A profitable month can still be the month you cannot pay the courier, because profit is an accounting idea and cash is a calendar. The projection tracks cash for exactly this reason.

Finally, a boundary worth stating plainly: this tool plans the money side of starting small. It cannot validate demand, guarantee a price the market will pay, or turn a weak offer into a strong one — and any tool or guru promising guaranteed income from a zero-investment business is selling the guarantee, not the income. Run the numbers here, then go and test the one assumption everything rests on: that strangers will actually buy.