How Much Financial Runway Do You Actually Need?

Financial Runway: The Number That Tells You How Long You Can Last

The benchmark is 6 months of liquid expenses — below that, and planning to retire before 65, your runway is a liability.

Portugal’s unemployment rate was 5.7% in April 2026 (Eurostat). Spain’s was 10.3% in the same month. In Spain, the median job search duration after unemployment reached 7.3 months in 2024 (SEPE, December 2024). Your financial runway is the number of months you can cover all expenses without any income. It is the first honest measure of whether your financial position is actually solid.

Why This Metric Matters More Than Your Portfolio Balance

A high investment balance is not the same as safety. Liquid coverage is.

If a large share of your net worth is in property, it is illiquid. You cannot pay rent or groceries with an appreciation percentage. Someone with €400,000 in real estate and €8,000 in liquid savings has a runway of roughly 2–3 months. That is not 20 years of wealth.

How the Calculation Works

The formula is simple. Divide your total liquid assets by your monthly essential expenses.

Liquid assets: cash in savings accounts, money market funds, or short-term deposits — anything you can access within a week without a penalty. Exclude index funds unless you are willing to sell. Exclude PPR balances before maturity. Exclude anything with a lock-up.

Monthly essential expenses: rent or mortgage, utilities, food, insurance, debt service. Not discretionary spending. Not holidays.

If you hold €36,000 across liquid accounts and your essential monthly outgoings are €2,800, your runway is 12.9 months. That is a defensible position. If you hold those same €36,000 across three banks, two of them may mis-classify a standing transfer between your own accounts as income, and your app then gives you an inflated figure.

Your runway is only accurate when the inputs are accurate.

What Counts as a Good Number

6 months is the floor. 12 months is where most financially literate Iberian households should aim.

Spain’s structural unemployment rate makes this concrete. At 10.3% unemployment, Spanish jobseekers spent a median of 7.3 months searching in 2024 (SEPE, December 2024). A sub-6-month runway is an unpriced risk, not a strategy.

Portugal’s HICP inflation ran at 2.4% in December 2025 (Eurostat). That means €2,800/month in expenses today becomes €2,867 in 12 months. Your runway calculation needs a refresh every year — or the number quietly shrinks in real terms.

If you are freelance, own a business, or earn variable income, 12 months is the floor.

The Counterargument: Isn’t Cash Drag a Real Cost?

Yes. Holding 12 months of expenses in a savings account earning 2.5% while index funds return 6–7% annually is a drag on wealth.

That objection is correct but incomplete. If your runway already exceeds 12 months, the drag argument has merit — redirect the excess into index funds. Below 12 months, the drag argument is a rationalisation for underinsurance. The runway is insurance, not investment. That cost is the premium you pay for not being forced to sell at a loss. The IBEX 35 fell 33% between January 1 and March 31, 2020 (Bolsas y Mercados Españoles, April 2020). Someone who liquidated Spanish equities in Q1 2020 to cover three months of expenses locked in that loss. The cash holder paid nothing.

Insurance that looks expensive in a bull market is the only kind that works in a bear one.

So What: Calculate Your Real Number

If you want to know your actual runway, start by pulling your balances manually. Then check whether a tool handles the reconciliation automatically. MyCFO calculates it for you — inter-account transfers excluded from both sides.

Here are the steps to get an honest figure:

List every account you hold with a liquid balance — savings, current, and money market.
Sum the balances, then subtract any amount tied to a pending transfer between your own accounts.
Calculate your average monthly essential expenses over the last 3 months, excluding one-off payments.
Divide total liquid balance by monthly essential expenses.
If the result is below 6, you have a gap to close before increasing any investment contributions.

“At 10.3% unemployment in Spain, a runway below 6 months is not a financial choice — it is a risk you are taking without pricing it.”

Your runway in months is the number. Build to 6 first. Then invest the rest.

The gap is real. Close it before you optimise anything else.

Get the runway to 6 months minimum. Then start optimising.

Frequently Asked Questions

How do I calculate my financial runway if my savings are split across multiple banks?

Add up all liquid balances across every account — savings and current — then subtract any amounts that represent transfers between your own accounts. Divide the clean total by your monthly essential expenses. The most common error is counting an inter-account transfer as income in one account and as a balance in another. This inflates the number. Use a tool that strips transfers automatically, or reconcile the exports manually.

Can I include my PPR balance when calculating financial runway in Portugal?

No, not in most cases. Portugal structures PPR funds for retirement, attaching early redemption penalties unless you meet specific conditions — unemployment, serious illness, or age criteria. Including a PPR balance in your liquid total overstates your runway. Access only assets you can liquidate within 5–7 business days without a tax hit or product fee. Check the Autoridade Tributária guidelines on early redemption conditions before assuming access.

Does my Plan de Pensiones count toward my financial runway in Spain?

No. A Plan de Pensiones in Spain is illiquid by design. Early access is restricted to exceptional circumstances — long-term unemployment or serious illness — as defined by Hacienda rules. If you include it in your liquid asset total, you are overstating your actual safety buffer. It counts toward long-term retirement wealth, not short-term coverage. Build your 6-month runway entirely from assets outside your pension structure.

Knowing your financial runway is the one calculation that sits at the base of every other personal finance decision. Most people with multiple bank accounts have never seen their real number. MyCFO aggregates your balances across all accounts automatically, strips inter-account transfers that would otherwise inflate your totals, and gives you a single accurate figure. Find out where you actually stand →