Startup Burn Rate Calculator (free 2026 tool)

What this tool does

Calculates monthly burn rate (operating costs) and runway (months of cash remaining) for a bootstrap startup. Useful for non-resident founders managing capital efficiency.

Who needs it

Bootstrap founders managing burn rate.

How it works

1. Enter monthly costs: LLC fees, CPA, software subscriptions, contractor payments.
2. Enter current cash reserves.
3. Tool calculates burn rate and runway.
4. Suggestions for reducing burn.

Inputs

• Monthly costs by category
• Current cash reserves

Output

Monthly burn rate, runway in months, cost-reduction suggestions.

What does this burn rate calculator actually compute?

This tool turns two pieces of information into a number you can act on. You enter your monthly costs by category, such as LLC fees, your CPA, software subscriptions, and contractor payments, and you enter your current cash reserves. From those entries it calculates your monthly burn rate, which is the total cash leaving your account each month to keep the business operating. It then divides your reserves by that burn rate to produce your runway, expressed in months of cash remaining. The output is three things together: the burn rate figure, the runway in months, and a short set of cost-reduction suggestions tied to the categories you typed in.

The reason this matters for a non-resident founder running a Delaware LLC is that you are usually spending from a finite pool of personal savings before the company earns its own revenue. There is no local salary cushioning the gap and no investor wiring fresh capital on a schedule. Burn rate is the speed at which that pool drains, and runway is the deadline it implies. Knowing both lets you decide whether to cut a subscription this week or whether you have a comfortable year to keep building. The calculator does not predict revenue or growth. It measures the downside clock, which is the one number that determines whether the business is still alive when your plan finally starts working.

How to read each input field correctly

The monthly costs section is where most of the accuracy lives, so enter every recurring obligation rather than only the obvious ones. LLC fees belong here as a smoothed monthly figure, not a single annual lump, because the calculator works in months. Your CPA fee is often quoted annually or per filing, so divide it across twelve months to avoid a misleading spike. Software subscriptions should include everything that auto-renews, from your email and accounting tools to hosting and any paid API. Contractor payments are the category founders most often underestimate, because a designer here and a developer there add up faster than memory suggests. The goal is a total that reflects what genuinely leaves the account in a normal month.

Current cash reserves is the second input, and it should reflect money you are actually willing to spend on the business, not your entire net worth. If half your balance is rent and groceries you will never put into the company, including it inflates your runway and gives you false comfort. Enter the realistic working capital you have set aside for the LLC. Keep both inputs in the same currency so the division is meaningful, and convert any costs billed in another currency at a rate you can defend. Small input discipline here changes the output more than any clever formula, because runway is simply one honest number divided by another.

• Smooth annual fees into monthly figures before entering them.
• Include auto-renewing subscriptions you forget about between renewals.
• Use reserves you will truly deploy, not your full personal balance.
• Keep costs and reserves in one consistent currency.

How to read the burn rate and runway outputs

The burn rate output is the sum of everything you entered in the cost categories, presented as a single monthly figure. Read it as the price of staying open for one more month while changing nothing. If it surprises you, that surprise is the point, because most founders carry a rough guess in their head that is lower than reality. The runway output is reserves divided by burn rate, rounded to a number of months. A runway of eight means that at today's spending, with no new income, your reserves last roughly eight months. That figure is a planning horizon, not a promise, because real spending rarely holds perfectly flat.

Treat runway as a band rather than a precise date. If the tool shows nine months, your honest planning window is closer to seven, because unexpected costs and currency swings tend to shorten it rather than extend it. The cost-reduction suggestions that appear alongside the numbers point at the categories carrying the most weight, so use them as a starting list rather than instructions. A long runway is not automatically good if it comes from spending too little to ship anything, and a short runway is not automatically a crisis if revenue is days away. The numbers describe your position. The judgment about what to do with that position stays with you.

A worked example for a solo non-resident founder

Imagine a founder outside the United States running a Delaware LLC and building a small software product alone. Their monthly costs might look like this: a smoothed LLC and compliance figure of about $25 a month once the $300 annual franchise tax is spread across twelve months, $50 a month for a CPA who handles the Form 5472 and 1120 filing, $90 a month in software subscriptions across hosting and tools, and $400 a month for a part-time contractor. That totals $565 a month in burn. With $6,780 in reserves set aside for the business, the tool returns a runway of roughly twelve months. That single year is the window in which the product must start paying for itself.

Now change one input to see how sensitive runway is. Suppose the founder hires a second contractor and burn rises to $1,065 a month. The same $6,780 in reserves now yields a runway closer to six months, half of what it was. Nothing about the bank balance changed, only the spending rate, yet the deadline moved forward six months. This is the lesson the calculator teaches by example: runway responds far more sharply to ongoing monthly costs than to one-time purchases, because every recurring dollar is multiplied by every month it keeps recurring. Running two or three scenarios like this before committing to a hire is the highest-value way to use the tool.

The Delaware fees this tool is built to account for

The cost categories in this calculator map onto real obligations a Delaware LLC carries, and grounding your entries in the actual figures keeps the burn rate honest. The Certificate of Formation that creates the company costs $110 as a one-time state filing fee. Every Delaware LLC then owes a flat annual franchise tax of $300, due on June 1 each year regardless of revenue or activity. That franchise tax is the single recurring state cost most founders forget to smooth into their monthly burn, and at $25 a month it is small but real. Skipping it in your inputs is one of the most common reasons a runway estimate ends up slightly too optimistic.

On top of the state fees sit the federal compliance costs that a non-resident-owned LLC cannot avoid. A foreign-owned single-member LLC must file Form 5472 alongside a pro forma Form 1120 every year, and missing that filing carries a penalty of $25,000. Most founders pay a CPA to handle it, which is why a professional fee belongs in your monthly costs. The Employer Identification Number itself is free when you obtain it directly through Form SS-4, with processing taking roughly 8 to 10 business days, so it should not appear as a recurring cost. Entering these real obligations rather than guesses is what separates a useful runway figure from a comforting fiction.

• $110 one-time Certificate of Formation filing fee.
• $300 annual Delaware franchise tax due June 1.
• CPA fees for the annual Form 5472 and 1120 filing.
• EIN via Form SS-4 is free, so it is not a recurring line.

What the late penalties mean for your runway math

The calculator measures planned spending, but missed deadlines create unplanned spending that can quietly shorten your runway. If the $300 Delaware franchise tax is not paid by June 1, the state adds a $200 late penalty plus interest of 1.5% per month on the unpaid balance. A founder watching a tight runway might be tempted to let that payment slip to preserve cash, but doing so converts a predictable $300 obligation into a growing liability that compounds monthly. The calculator's honest signal is to keep that payment inside your burn so it never becomes a surprise charge that the runway figure failed to anticipate.

The federal side is far more severe. The $25,000 penalty for failing to file Form 5472 dwarfs almost any monthly burn a bootstrap founder carries, which means a single missed filing can wipe out years of careful runway management in one stroke. When you read a comfortable runway from this tool, that comfort assumes you stay compliant. Build the compliance cost into your monthly inputs and treat the filing deadlines as non-negotiable fixed points. A short runway is recoverable. A $25,000 penalty triggered by trying to save a few hundred dollars on a CPA is the kind of event the calculator exists to help you avoid by making the true cost of staying open visible.

Common mistakes founders make with burn rate

The most frequent error is leaving annual costs out of the monthly view. Founders enter their software subscriptions and contractors faithfully but forget the franchise tax, the CPA's annual fee, or the renewal of a yearly tool, and the burn rate comes out artificially low. The fix is to walk through a full twelve-month calendar once, list every charge no matter how infrequent, divide each by twelve, and add it to the monthly total. A second common mistake is treating one-time setup costs like the $110 formation fee as recurring, which inflates burn the other direction. One-time spending reduces your reserves once. It does not belong in the ongoing monthly figure.

Another mistake is anchoring on a single runway number and ignoring how fragile it is. A founder sees twelve months, relaxes, and signs up for two new subscriptions and a contractor, never re-running the calculation to notice the runway has dropped to seven. Burn rate is not a number you check once at formation. It is a number you re-check every time a recurring cost enters or leaves the business. Finally, many founders quietly include personal living costs in reserves to make the runway look longer. That self-deception is the most dangerous mistake of all, because it produces confidence the cash cannot actually support.

• Forgetting annual costs like franchise tax and CPA fees.
• Counting one-time setup fees as monthly burn.
• Checking runway once instead of after every cost change.
• Padding reserves with money meant for personal living.

Edge cases the calculator handles and where judgment is needed

Some situations stretch a simple burn-and-runway model, and it helps to know where the tool stops and your own thinking begins. If you already have revenue, this calculator measures gross burn, the total going out, rather than net burn, which would subtract income. For a pre-revenue founder these are the same number, which is why gross burn is the right lens early on. As soon as money starts coming in, mentally treat your real runway as longer than the tool shows, because incoming revenue offsets some of the outflow. The calculator deliberately gives you the conservative figure, and conservative is the safer error when your savings are on the line.

Currency is the other edge case for a non-resident founder. If you earn or hold reserves in one currency and pay Delaware fees and dollar-denominated subscriptions in another, exchange rate movement quietly changes your real burn from month to month. The calculator works in whatever single currency you feed it, so it cannot see a swing that happens after you enter the numbers. The practical response is to re-run the calculation whenever rates move meaningfully and to keep a small buffer in your reserves figure for the currency you actually pay vendors in. The tool gives you a clean snapshot. Reality has a few moving parts the snapshot cannot capture on its own.

How banking choices affect your real burn

The account you use to hold reserves and pay vendors is part of your burn picture, because fees and conversion spreads are real costs even when they hide inside a transaction. Non-resident founders commonly open business accounts with providers like Mercury, Wise, Relay, Lili, or Payoneer, and each handles currency conversion and transfers differently. A platform with a poor exchange rate or a flat charge on every international payment can add a slow, invisible drain that never appears as a line item but still shortens your runway. When you enter software and contractor costs into the calculator, the number you should use is what actually leaves your account, conversion costs included, not the sticker price of the service.

Choosing where to hold reserves also affects how truthfully you can read your runway. If your money sits in a currency different from your main expenses, the reserves figure you type in is a moving target. Holding a dollar balance for dollar-denominated Delaware fees and subscriptions removes one layer of uncertainty from the calculation, because reserves and burn are then measured in the same unit. The calculator cannot pick a bank for you, but it rewards a banking setup that keeps conversion friction low and currencies aligned. The cleaner your money flow, the more your runway figure reflects the real number of months you can keep going.

• Include conversion spreads and transfer fees in your cost entries.
• Holding reserves in your spending currency removes guesswork.
• Flat per-payment charges quietly compound across many vendors.

One cost this tool helps you frame: formation pricing

Setting up the LLC itself is a one-time decision that sits at the front of every runway calculation, and it is worth framing correctly. The state charges $110 for the Certificate of Formation, and a formation service that handles the paperwork, registered agent, and EIN guidance is offered here as a one-time fee of $297. Because both are one-time costs, neither belongs in your recurring monthly burn. They reduce your reserves once at the start, which lowers the number you type into the reserves field, and from that point forward they have no effect on burn rate. Keeping this distinction clear stops you from double-counting setup spending against every future month.

Where formation does touch ongoing burn is through the recurring obligations it creates, such as the $300 annual franchise tax and the yearly Form 5472 filing your CPA handles. So the right mental model is simple: pay the one-time setup costs out of reserves, then carry only the recurring compliance and operating costs in your monthly burn. The calculator keeps these two buckets separate by design, which is why it asks for reserves and monthly costs as different inputs. Putting each cost in its correct bucket is the difference between a runway figure you can trust and one that drifts off by months in either direction.

What to do once you have your runway number

A runway figure is only useful if it changes a decision, so end every session with the tool by asking what the number tells you to do differently. If your runway is long, the message is usually permission to spend a little more deliberately on the thing that drives growth, rather than hoarding cash while the product stalls. If your runway is short, the message is to look at the largest cost categories first and ask which can be paused, renegotiated, or cut without stopping the work that earns revenue. The cost-reduction suggestions the tool surfaces are a prompt for exactly that conversation, pointing at where your money concentrates.

The deeper habit is to re-run the calculation on a schedule and after every meaningful change, not just once. Treat the start of each month as a moment to refresh both inputs, because reserves shrink and costs shift. Before any new hire or subscription, model the after-state first and watch what it does to the months remaining. Pair a falling runway with your revenue trend, because runway shortening while income climbs is a different situation from runway shortening with no income in sight. Used this way, the calculator becomes less a one-time check at formation and more a steady instrument that keeps a non-resident founder honest about how much time the current plan really has.

• Long runway: deploy capital deliberately toward growth.
• Short runway: cut or renegotiate the heaviest cost categories first.
• Re-run monthly and before every new recurring commitment.
• Read runway alongside your revenue trend, not in isolation.