Runway Maths: How Much Should You Actually Raise?
Raise enough for 18-24 months of net burn plus a three to six month buffer for the next raise, which for a typical Gulf pre-seed team means asking for roughly $500,000 to $1.2 million. Startup runway maths is simple once you separate the three numbers that drive it: your monthly burn, the months you need to reach a milestone, and the months the fundraising process itself will consume.
Most founders raise too little, too late. They model the company they have today, then hit the market with a number that ignores hiring, delays and the unglamorous reality that raising the next round takes a quarter or more of face-to-face meetings. This article walks through the calculation with real numbers, so you can arrive at a figure you can defend and survive long enough to spend it.
Startup Runway: The Short Answer
Your target raise is the answer to one formula: the number of months to your next milestone, multiplied by the net burn you expect to run at that point, plus a three to six month buffer. For pre-seed, the market-standard runway is 18-24 months. If your net burn after hiring settles at $30,000 a month, you are looking at $540,000 to $720,000 for the runway alone, with the buffer taking the number to roughly $700,000 to $900,000.
Two mistakes dominate. First, raising for 12 months or less, which guarantees a second, harder raise before the company has meaningfully changed. Second, sizing the raise from today’s burn instead of the burn the milestone requires: the number rises as you hire, and the raise must fund the company at its target size, not its current one.
How to Calculate Monthly Burn: Gross Versus Net
Burn has two definitions and the difference matters. Gross burn is everything the company spends in a month: salaries, visas, office, software, marketing, legal. Net burn is gross burn minus whatever revenue or other cash flows in. Runway is always calculated on net burn, because it is the rate at which the bank balance actually falls.
A worked example for a three-person Bahrain team: salaries and benefits $16,000, office and visas $3,000, software and subscriptions $1,200, marketing $800, for a gross burn of $21,000. Early revenue of $4,000 brings net burn to $17,000. With $340,000 in the bank, runway is exactly 20 months: $340,000 divided by $17,000.
| Line item | Monthly cost |
|---|---|
| Salaries and benefits | $16,000 |
| Office, visas and licences | $3,000 |
| Software and subscriptions | $1,200 |
| Marketing and growth | $800 |
| Gross burn | $21,000 |
| Less early revenue | $4,000 |
| Net burn | $17,000 |
The calculation only works if the numbers are real. Track every outflow in the same system you use for tax: our startup accounting checklist sets up the monthly cash review, and a dedicated business bank account in the Gulf keeps company cash separate from personal money from day one. Recompute net burn every month; it drifts as hiring, churn and revenue move.
The 18-24 Month Startup Runway Rule
Why 18-24 months and not 12? Because the pre-seed job is to convert money into evidence, meaning customers, retention, revenue and a product that works, and evidence is what the next round is bought with. Twelve months is barely enough time to hire, build and start selling; 18 to 24 months gives you two or three honest iterations, a data set investors can underwrite, and runway left while the next round is negotiated.
Within the range, choose by market: 18 months suits a lean, low-burn company selling into a fast market; 24 months suits enterprise sales cycles, regulated sectors such as fintech, or hardware. Gulf investors back this logic. MENA funding reporting from MAGNiTT tracks round sizes and timing across the region, and the pattern is consistent: companies that raise again inside 12 months raise smaller, harder and from a weaker position.
Startup Runway: Adding a 3-6 Month Raise Buffer
Raising takes three to six months from first meeting to cash in the bank: six to ten weeks of meetings, four to eight weeks of due diligence, three to six weeks of legal work, then the transfer itself. Most founders underestimate the calendar, because a pipeline can look alive for months before anything closes. If the next round starts when the bank hits zero, the company is finished; if it starts with nine months of runway left, the founder negotiates from strength.
This is the buffer the short answer promised: add three to six months of net burn to the raise so the next round can open while this one still funds the company. It is not padding, it is the measured cost of the process. Our guides on pre-seed funding in the GCC and what happens after the term sheet map the full journey and its timing.
How Hiring Changes Your Startup Runway
Burn is not a flat line; it is a staircase, and every hire adds a step. A mid-level engineer at $55,000 a year costs roughly $6,000 a month once employer costs, benefits, visa and equipment are included, and that is the conservative end in Dubai and Riyadh. Two hires, a product person and a growth person, can add $15,000 to $18,000 a month of net burn before they contribute meaningfully to revenue, and each takes three to six months to reach full productivity.
Model the staircase, not the average. Plan the headcount each milestone requires, price each role with current market rates, and build the month-by-month burn curve the raise must fund. Hiring earlier than the plan is how companies burn through a third of the round before the product changes. Our tech salary benchmarks for the Gulf price the roles with current numbers, so the staircase is grounded in what hiring actually costs.
GCC Cost Bases and Your Startup Runway
The same startup has a different runway in Manama, Dubai and Riyadh because the cost base differs. Bahrain offers the leanest base: low-cost visas, inexpensive offices and a competitive market for early engineers, which stretches a $500,000 round substantially further. Dubai adds premium salaries, higher office and schooling costs, and a talent market that competes with global companies. Riyadh is building fast, with aggressive compensation for scarce technical skills and Saudisation considerations that shape the hiring plan.
Budget the full employment cost, not the headline salary: visa processing, medical insurance, annual flights, end-of-service benefits and recruitment fees typically add 25-40% on top of cash. The Startup Genome ecosystem reports rank Gulf cities on talent and cost, and the city data is a useful cross-check when you defend your burn in front of an investor who knows the market.
The Startup Runway-to-Milestone Formula
Assemble the pieces into one number. Step one: define the milestone that justifies the next round, for example 500 paying customers with steady month-on-month retention, or $40,000 of monthly recurring revenue. Step two: model the net burn needed to get there, month by month, including the hires the milestone requires. Step three: multiply by the months to the milestone, add the buffer, and round to a credible market number.
Example one, Bahrain: the target is $30,000 of monthly recurring revenue in 20 months. Net burn averages $25,000 across the period, including three hires. Twenty months at $25,000 is $500,000; four months of buffer at $25,000 adds $100,000, and the number is $600,000: a raise that funds the milestone with room to negotiate the next round.
Example two, Dubai: a six-person team targeting an enterprise pipeline over 18 months. Net burn averages $55,000. Eighteen months is $990,000; three months of buffer adds $165,000, and the round closes at $1.2 million including legal and banking costs. Both sit inside the ranges Gulf pre-seed investors deploy, as tracked by Wamda.
Then stress-test the number: what happens if revenue lands three months late, or a key hire takes twice as long to find? If the company survives the delay with the buffer intact, the number is right. If not, cut the plan, the milestone or the headcount, until the maths works. Accelerator programmes are a legitimate smaller first step; our accelerator equity benchmark weighs that route.
| Action | Why it matters | When |
|---|---|---|
| Build a 24-month cash model with gross and net burn | The raise number starts here | Before the first investor meeting |
| Define the milestone the next round will be raised on | Gives the raise a purpose investors can underwrite | Before fixing the target |
| Price each planned hire with current market rates | Burn is a staircase, not a flat line | When building the model |
| Add three to six months of net burn as a raise buffer | The next round takes a quarter or more | When setting the target |
| Recompute net burn and runway every month | Catch drift before it becomes a crisis | Monthly, at cash review |
| Agree the drawdown schedule with investors | Cash often lands in tranches, not one wire | At closing |
Runway maths rewards honesty. The number that survives scrutiny is the one built from a real burn curve, a real milestone and a real buffer; everything else is optimism dressed up as a round size.
Frequently asked questions
What is the difference between gross burn and net burn?
Gross burn is total monthly cash outgoings before any revenue. Net burn is gross burn minus monthly revenue or other cash inflows. Runway is always calculated on net burn, because that is the rate at which the bank balance actually falls.
How many months of runway should a pre-seed startup target?
The working rule is 18-24 months of net burn, because building to a provable milestone and raising the next round takes roughly that long. Twelve months or less forces rushed decisions and a weaker second raise.
Should the raise include a buffer for the fundraising process?
Yes. Add three to six months of net burn as a buffer, because term sheets, due diligence, legal work and the transfer typically take three to six months from first meeting to cash in the bank.
What is the runway-to-milestone formula?
Define the milestone that justifies the next round, model the net burn needed to reach it, multiply by the months required, and add a three to six month buffer. If the number does not fit the market, change the milestone or the headcount plan.
The size of the raise is a decision, not a discovery. Decide the milestone, model the burn curve to reach it, add the buffer for the process, and test the number against reality. Do that, and you will raise neither too little to survive nor so much that you cannot defend the valuation.
Author: Mustafa Hasan, Founding Partner at Valu.vc. Updated: 3 August 2026.
