Free Break-Even Calculator — Units to Cover Fixed Costs + Profit-Target Mode

What This Calculator Does

Break-even analysis is the single most under-used tool in small-business finance — it answers, in one number, the question every founder, freelancer, and operator eventually asks: how many units do I have to sell before I stop losing money? This calculator takes three inputs — your fixed costsfor the period, your price per unit, and your variable cost per unit — and returns the unit count where total revenue exactly equals total cost. Sell one unit fewer, you are in the red. Sell one unit more, you are printing profit. The crossover point is the break-even.

Layered on top, the calculator runs a profit-target overlay: tell it how much profit you want to walk away with at the end of the period, and it re-solves for the unit count that delivers that profit on top of covering fixed costs. The same arithmetic, just with the target slid up. That second answer is what turns break-even from a survival metric (“don’t go broke”) into a planning metric (“hit the number you actually want”) — and it is usually the more useful output of the two for anyone past their first six months in business.

The whole framework hinges on one concept: contribution margin. That is the dollar amount each unit you sell contributes toward covering fixed costs and, eventually, profit. Price minus variable cost. If you sell soap for $12 and it costs you $4 in raw materials and shipping, every bar contributes $8 toward the rent, the insurance, and your salary. Once those fixed costs are covered for the month, every additional $8 is yours to keep. Break-even is just the unit count where the running total of contribution margin catches up to the running total of fixed cost. Contribution margin is the engine, and most of the value of this calculator is in forcing you to be honest about that one number.

The Math: Contribution Margin → Break-Even

The arithmetic is intentionally trivial — break-even is one of the few places in finance where the formula fits on a sticky note and still answers the question completely. The four formulas the calculator runs internally:

That is the entire model. The first formula isolates the dollar your product actually generates per sale. The second normalizes it as a percentage so you can compare across products at different price points (a $2 margin on a $4 SKU is identical, in CM% terms, to a $50 margin on a $100 SKU — both are 50%). The third is the break-even unit count. The fourth slides the target up by your desired profit, which is just a different fixed-cost number with the profit goal stapled on. The whole framework is sometimes called Cost-Volume-Profit (CVP) analysisin accounting textbooks, and it is the foundation underneath every pricing exercise, every “should we hire” decision, and every capacity-planning question a business will ever face.

One number is worth memorizing as a benchmark: contribution margin percentage. A strong CM is 50%+ — that is the territory of software, professional services, and premium retail, where each sale is mostly profit after the variable cost of delivering it. A typical CM is 30–50%, the range most mid-market retail and restaurants operate in. A thin CM is under 20%, the realm of commodity retail and low-margin distribution where you have to move serious volume to make any money at all. If you compute your CM% and it lands well below the band you expected for your category, that is a red flag the math will not paper over — either price is too low or variable cost is too high, and one of them has to move before scale fixes anything.

The pathological case to watch for: negative contribution margin, where variable cost is greater than or equal to price. The break-even formula divides by margin, so a margin of zero gives infinite break-even (you can never catch up), and a negative margin gives a nonsense answer. The calculator catches that and refuses to return a unit count, because there isn’t one. If you’re selling something for less than it costs you to make it, no volume will save you — every additional sale loses you more money. The fix is not marketing; it is killing the product or repricing it. This is the exact failure mode that sinks most VC-funded delivery startups in their first 24 months.

Fixed vs Variable: The Crucial Distinction

Break-even math depends entirely on getting one categorization right: which costs scale with units sold, and which do not. Get this wrong and the answer is wrong by whatever percentage you misallocated.

Fixed costs stay flat regardless of how many units you sell. Rent on the storefront is the same whether you sell 10 cupcakes that month or 10,000. Salaried team members get paid the same. Software subscriptions, insurance premiums, accountant retainers, the loan payment on the espresso machine — none of those care about volume. You pay them every month even if the doors are closed for the week. Add them all up for the period (month, quarter, year — pick one, then stick to it) and that is the fixed-cost number.

Variable costsscale linearly with each unit you sell. Raw materials are the obvious one — if you make a soap bar, the oils, lye, fragrance, and packaging are all variable. Shipping per order. Payment-processing fees (the Stripe 2.9% + 30¢ per transaction is variable, even though it feels invisible). Sales commissions paid as a percentage of the sale. Per-unit packaging and per-order pick-and-pack labor. The rule of thumb: if you sold zero units this month, would this cost go to zero? If yes, it is variable. If it gets billed anyway, it is fixed.

The grey-zone categorization is where most spreadsheets quietly lie. A few examples and the honest answer:

• Ad spend.If you have a fixed monthly Google Ads budget of $2,000 regardless of conversion volume, that is a fixed cost. If you pay $30 of Facebook ads per acquired customer (CPA-style, scaled to volume), that is variable. Most real businesses have a mix — separate the “always-on” floor from the per-conversion top-up.
• Freelancer hours. If you have a freelancer on retainer for $3,000 a month, that is fixed. If you pay an hourly contractor only when orders come in and they spend an hour per order, that is variable at $X/hour times unit volume.
• Utilities at a small storefront. Mostly fixed (lights and HVAC run regardless), but kitchen gas in a busy restaurant scales loosely with covers. If the variable component is small enough to round to zero, treat it as fixed and move on; over-engineering the model costs more than the precision is worth.
• Your own labor. If you draw a fixed monthly salary out of the business, it is fixed. If you pay yourself only when you do client work (per billable hour), it is variable. Most solo founders should classify their salary as fixed at a realistic market wage and run the calculator with that included — covering it is the entire reason the business exists.

For a service business, the “unit” is the engagement, the customer-month, or the day rate. The math doesn’t change — fixed costs divided by contribution margin per engagement gives break-even engagements per period. A consultant’s variable cost per engagement is usually small (cloud software, travel reimbursements), so contribution margin is close to the day rate itself, which is why service businesses can hit break-even on remarkably few clients. The freelance rate calculator approaches the same arithmetic from the other direction — what hourly rate covers your fixed costs given a realistic billable-hour count.

How to Use This Calculator

1. Pick a time period and stick to it. Monthly is the most useful for ongoing operations; annual is more useful for product-launch and should-we-build-this decisions. Whichever you choose, all three inputs need to be on the same clock — annualized fixed costs paired with per-unit price gives you annual break-even units, while monthly fixed costs paired with the same price gives monthly break-even units. The most common error in this calculator is mixing periods.
2. Enter fixed costs for the period. Sum every cost that bills regardless of unit volume — rent, salaries (including yours), insurance, software, accountant retainers, debt service, fixed marketing budgets, equipment leases. Be honest about your own salary; under-counting it makes the business look like it’s breaking even when it’s actually subsidizing itself with your unpaid labor.
3. Enter price per unit — the actual price the customer pays after discounts and promotions, not the list price. If you sell at a steady 15% discount, your real price is 85% of list. If you sell wholesale at a different price than retail, you have two SKUs with two break-even calculations, not one.
4. Enter variable cost per unit— every cost that scales linearly with each sale. Materials, packaging, per-order shipping, payment-processing fees (don’t skip these — Stripe’s 2.9% + 30¢ on a $40 order is $1.46, which is meaningful at low margins), per-unit commissions, fulfillment labor.
5. Optional but recommended: enter a profit target for the period. The calculator will return both the break-even unit count (covering fixed costs only) and the target unit count (covering fixed + profit). Comparing the two tells you how much above survival mode you have to operate to actually pay yourself the way you wanted.

Three Worked Examples

Three real scenarios across very different businesses, each of which collapses to the same four-formula model.

Example 1 — Etsy soap business (annual)

You make handmade soap and sell it on Etsy. Your annual fixed costs are $2,400 — that’s your share of a co-working kitchen ($150/month $1,800), your business insurance ($300/year), domain and Etsy shop fees ($100), and a bookkeeping subscription ($200). You sell each bar for $12. Your variable cost per baris $4 — about $2.50 in oils, lye, and fragrance, $0.50 in packaging, and $1.00 in average shipping cost (you use priority-mail flat rate and bake it into the price). Contribution margin per unit = $12 − $4 = $8. Contribution margin % = $8 ÷ $12 = 67%— well into the strong-CM band, which is exactly what you’d expect for handmade premium retail. Break-even units = $2,400 ÷ $8 = 300 bars per year, or roughly 25 bars per month. That is a remarkably reachable number — most successful Etsy sellers in this category clear that in a single weekend craft fair. Set a profit target of $6,000 for the year (a modest side-income goal): target units = ($2,400 + $6,000) ÷ $8 = 1,050 bars per year, or about 88 per month. The gap between 25/month (survival) and 88/month (the income you actually wanted) is the more honest picture of what the business has to do — and it is a 3.5× jump that requires real marketing, not just opening the shop.

Example 2 — SaaS startup (annual, monthly subs)

You run a B2B SaaS product. Annual fixed costs are $50,000 — your salary at a sub-market $40K, $5K of cloud baseline (Vercel, Postgres, Stripe minimums, a few infra services), $2K of software, and $3K of accounting and legal. You charge $30/month per seat. Variable cost per subscriberis small — about $3/month in marginal hosting, support tooling, and payment-processing fees. Contribution margin = $30 − $3 = $27/sub/month. CM% = 90%, classic software economics. The unit here is a subscriber-month, not a one-time sale, which is the one twist worth watching. Break-even monthly subscribers= ($50,000 ÷ 12) ÷ $27 = about 154 subs at any given moment. Or, run it the other way: at $27/sub/month, you need 1,852 subscriber-months per yearof activity to cover the $50K, which averages to that same 154 simultaneous-sub figure. Set a $100,000 profit target on top: ($50,000 + $100,000) ÷ $27 = 5,556 subscriber-months, which works out to roughly 463 simultaneous subs. The leap from 154 to 463 is a 3× scale-up that most early SaaS founders systematically underestimate the difficulty of — break-even is reachable in a year or two; the profit target is usually a three-to-five-year project. Pair this with the investment ROI calculator once the business is profitable, to gauge whether the dollars you are leaving in the company are growing faster than they would in an index fund.

Example 3 — Single-location restaurant (monthly, by ticket)

You operate one restaurant. Monthly fixed costs are $20,000 — rent ($6,000), salaried managers and base kitchen wages ($10,000), utilities and insurance ($2,000), software and POS ($500), and marketing baseline ($1,500). Your average ticket is $35 (the mean bill across all dine-in and pickup orders for the month). Variable cost per ticketis $14 — roughly $10 in food cost (the industry-standard 28–32% food cost ratio), $1 in payment-processing fees, and $3 in per-meal hourly labor (the part of the staffing budget that scales with covers). Contribution margin per ticket = $35 − $14 = $21. CM% = 60%, which is at the high end of the typical-restaurant band — anything below 55% on casual dining usually means food cost has crept up or labor is heavier than the model suggests. Break-even tickets per month = $20,000 ÷ $21 = 953 tickets, or about 31 tickets per dayfor a 30-day month. That is a plausible covers-per-day for a single-location casual restaurant — well within reach but not trivial; a slow Tuesday at 18 covers does not get there alone. Set a $4,000/month profit target (modest take-home above the salary you’re already paying yourself in fixed costs): target tickets = ($20,000 + $4,000) ÷ $21 = 1,143 tickets/month, or 38 per day. The 22% jump from break-even to a real take-home number is exactly the gap most restaurant operators feel as the difference between “treading water” and “a good month.”

Common Mistakes

• Treating salary as variable when the team is fixed.If you have three salaried kitchen staff who get paid whether the restaurant is empty or packed, their wages are fixed cost — full stop. Misclassifying them as variable (e.g., loading them into a per-meal labor rate that scales) inflates your contribution margin and drops your break-even number into fantasy territory. The break-even won’t actually happen at the unit count you calculated, and you’ll spend months wondering why the math says you’re profitable while the bank account disagrees.
• Mixing time periods between inputs.The single most common arithmetic error: dividing annualized fixed costs by per-unit margin and treating the answer as monthly break-even. If your fixed costs are annual ($24,000), the break-even is annual units. If you wanted monthly break-even, divide fixed costs by 12 first ($2,000/month). The calculator can’t infer your intent from the numbers alone — pick a period and run all three inputs on it.
• Ignoring payment-processing fees in variable cost. Stripe, Square, Shopify, PayPal — every payment processor takes 2.5–3.5% plus a fixed transaction fee. On a $40 order that is $1.50, which is small. But on a $4 impulse-buy SKU it is $0.42, which can be 10–15% of your contribution margin and completely change the break-even number. Always include them in variable cost, even if the dollar amount feels trivial.
• Assuming all marketing is fixed. A baseline brand-marketing budget (your monthly $2K of always-on Google Ads, the SEO retainer) is fixed. But variable performance marketing — paying $25 per acquired customer through a CPA-bid Facebook campaign — scales linearly with conversions and belongs in the variable bucket. Most growing businesses have both; force yourself to split the marketing line into the floor and the per-conversion top-up.
• Counting personal labor at $0.If you, the founder, are working 60 hours a week in the business and not drawing a salary, the math will say you’re “profitable” long before the business actually is. Plug a market-rate salary for your role into fixed costs, even if you’re not taking it as cash yet. Break-even with realistic founder pay is the number that tells you whether the business deserves to exist; break-even with founder labor at zero is the number that tells you whether the business can stay open one more month.
• Rounding break-even down instead of up.If the formula gives you 952.4 tickets, you do not break even at 952 tickets — you’re still $8 short of fixed costs. Partial units don’t sell. Always round break-even upto the next whole unit. The same applies to the profit-target calculation: round up, otherwise the headline profit number is slightly less than what you’d actually walk away with.
• Ignoring the margin of safety. If you are currently doing 1,000 tickets/month and break-even is 953, your margin of safetyis (1,000 − 953) ÷ 1,000 = 4.7%. That is a terrifying number — a 5% drop in volume puts you underwater. Healthy small businesses run margin-of-safety in the 20–40% range. The break-even calculator gives you the floor; subtracting it from your actual sales gives you the cushion.

When This Calculator Decides For You

Break-even analysis maps directly onto a small set of go/no-go decisions that every operator makes repeatedly. The five most common:

1. Pricing a new product before launch. Run break-even at three candidate prices — your low-anchor, your mid-range, and your premium. Watch how the unit count moves. A small price increase usually drops break-even units dramatically because the contribution margin grows faster than the price (the variable cost stays the same). The first lever you should reach for when break-even feels unreachable is raise the price, then reduce variable cost, and only then cut fixed cost — those are the three levers in order of effectiveness.
2. Should we hire a salesperson.A new hire is a fixed-cost increase. Run break-even with the new salary added; the difference between the old break-even and the new one is exactly how many additional units the hire has to drive to pay for themselves. If they’re a $80K salesperson and your CM is $200/sale, they need to drive 400 incremental sales/year just to break even on themselves — anything beyond that is real ROI on the hire.
3. How many subscribers to seed before quitting the day job. Run break-even with your full personal living expenses loaded into fixed costs (not just business overhead — your rent, food, insurance, the works). The unit count you get is the subscriber base or customer count you need before the business can replace your salary. Most founders quit too early because they ran the math with under-counted personal expenses.
4. Whether the unit economics work for a Kickstarter.Crowdfunding campaigns lock in price at launch and force you to deliver at promised cost. Run break-even on the rewards-tier price minus realistic per-unit manufacturing-and-shipping cost. If you need 10,000 backers to break even on tooling and minimum-order-quantities, and your campaign realistically draws 1,500, do not launch — you’re on a path to a delivery crisis the day the campaign ends.
5. Figuring out how much volume the new factory line needs.A capital-equipment decision adds large fixed costs (depreciation, financing, maintenance). The break-even shift tells you exactly how much extra unit volume the new line needs to generate to be worth installing. If you’re currently selling 50K units/year and break-even with the new line is 80K, you need a credible path to 60% volume growth before the equipment pays for itself — otherwise the old line at lower output is the better answer.

What This Calculator Doesn’t Model

• Multi-product mix.Real businesses sell multiple SKUs at different prices and different variable costs. The break-even is on a single product; for a multi-product portfolio you’d need to compute a weighted-average contribution marginbased on your sales mix and divide fixed costs by that. The calculator handles each product in isolation — run your top SKUs separately, or use the dominant-product approximation if one SKU is >70% of revenue.
• Volume-discount tiers. Suppliers often give you a price break at higher order volumes (raw materials at $4/unit for orders under 1,000, $3.50 for 1,000–5,000, $3 for 5,000+). The variable cost in the calculator is a single number; if your real cost steps down at higher volumes, the actual break-even is lower than the calculator suggests, and the post-break-even profit grows faster than linearly.
• Seasonal demand.A monthly break-even of 31 tickets/day averages across the year — but a restaurant that does 18 covers/day in February and 50 covers/day in July is making the average work in a way that fixed monthly costs don’t care about. The off-season months still bleed cash even though the annual average is fine. For seasonal businesses, run break-even on the worst expected month, not the average — that is the cash-flow constraint that actually breaks businesses.
• Tax effects. The profit-target overlay assumes you want $X of pre-tax profit. If you wanted $X of after-taxtake-home, gross it up by your effective tax rate before plugging it in (e.g., for a 25% effective rate, target = desired take-home ÷ 0.75). The calculator does not adjust this for you because tax situations vary too widely to assume a default.
• Opportunity cost of capital.Hitting break-even doesn’t mean the business is a good use of your money — if the business breaks even while tying up $200K of your savings, the opportunity cost of that capital (what it would have earned in an index fund) is invisible in the model. For a true risk-adjusted comparison, run the projected post-break-even profit through the investment ROI calculator against the alternative-use return you would have earned passively.

Break-even analysis is the foundation, but it lives next to a handful of related decisions that the rest of the finance calculators page handles. Once you have your unit-economics dialed in, the budget calculator tells you whether your personal financial life can survive the months it takes to reach those unit volumes. The investment ROI calculator compares the post-break-even cash flow to alternative deployments of capital — useful for deciding whether to reinvest in the business or pull profit out. If you are a service business pricing your time, the freelance rate calculator is the same break-even arithmetic run from the rate side. And if your business is carrying debt while approaching break-even, run the loan against the credit card payoff calculator to model whether interest is silently moving the break-even target up faster than your sales are climbing.