Fortinet (STU:FO8) Interest Expense: €-17 Mil (TTM As of Mar. 2026)

What is Fortinet Interest Expense?

Fortinet STU:FO8 -3.70% 91 Interest Expense is €-17 Mil as of Mar. 2026. GuruFocus rates STU:FO8 with a GF Score™ of 91/100 and a GF Value™ of €87.21 (Significantly Overvalued). The stock has 5 warning signs investors should review.

Interest Expense is the amount reported by a company or individual as an expense for borrowed money. Fortinet's interest expense for the three months ended in Mar. 2026 was € -4 Mil. Its interest expense for the trailing twelve months (TTM) ended in Mar. 2026 was €-17 Mil.

Interest Coverage is a ratio that determines how easily a company can pay interest expenses on outstanding debt. It is calculated by dividing a company's Operating Income(EBIT) by its Interest Expense. Fortinet's Operating Income for the three months ended in Mar. 2026 was € 502 Mil. Fortinet's Interest Expense for the three months ended in Mar. 2026 was € -4 Mil. Fortinet's Interest Coverage for the quarter that ended in Mar. 2026 was 138.10. The higher the ratio, the stronger the company's financial strength is. Note: If both Interest Expense and Interest Income are empty, while Net Interest Income is negative, then use Net Interest Income as Interest Expense.

Fortinet (STU:FO8) Interest Expense Explanation

Note: If both Interest Expense and Interest Income are empty, while Net Interest Income is negative, then use Net Interest Income as Interest Expense.

Fortinet's Interest Expense for the three months ended in Mar. 2026 was €-4 Mil. Its Operating Income for the three months ended in Mar. 2026 was €502 Mil. And its Long-Term Debt & Capital Lease Obligation for the three months ended in Mar. 2026 was €430 Mil.

Fortinet's Interest Coverage for the quarter that ended in Mar. 2026 is calculated as

Interest Coverage	=	-1	*	Operating Income (Q: Mar. 2026 )	/	Interest Expense (Q: Mar. 2026 )
	=	-1	*	501.7	/	-3.633
	=	138.10

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

The higher the ratio, the stronger the company's financial strength is.

Good Sign:

Ben Graham prefers companies' interest coverage to be at least 5. Fortinet Inc has enough cash to cover all of its debt. Its financial situation is stable.

Fortinet Interest Expense Historical Data

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The historical data trend for Fortinet's Interest Expense can be seen below:

Fortinet Interest Expense Chart

Fortinet Annual Data

Trend

Dec16

Dec17

Dec18

Dec19

Dec20

Dec21

Dec22

Dec23

Dec24

Dec25

Interest Expense

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-13.19

-16.99

-19.26

-19.10

-17.17

Fortinet Quarterly Data
	Jun21	Sep21	Dec21	Mar22	Jun22	Sep22	Dec22	Mar23	Jun23	Sep23	Dec23	Mar24	Jun24	Sep24	Dec24	Mar25	Jun25	Sep25	Dec25	Mar26
Interest Expense	Get a 7-Day Free Trial															-4.53	-3.99	-5.28	-3.76	-3.63

91GF Score

Fortinet Inc STU:FO8

Interest Expense is just one metric. See GF Score™, valuation, warning signs, and more.

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Fortinet Interest Expense Calculation

Interest Expense is the amount reported by a company or individual as an expense for borrowed money.

Interest Expense for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was €-17 Mil.

Frequently Asked Questions Learn more about Interest Expense →

What does a Interest Expense of €-17 Mil mean?

Fortinet (STU:FO8) has a Interest Expense of €-17 Mil as of Mar. 2026. Interest Expense is the amount a company pays on its long-term debt. View historical data on Fortinet and its competitors.

Is Fortinet's Interest Expense too high?

Fortinet's current Interest Expense is €-17 Mil. Overall, Fortinet has a GF Score™ of 91/100 and is considered Significantly Overvalued, reflecting its overall financial health beyond just this single metric.

How does Fortinet's Interest Expense compare to SNPS and NET?

Fortinet's Interest Expense of €-17 Mil can be compared against companies in the Software industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.

What is a good Interest Expense for a Software company?

A good Interest Expense depends on the Software industry context. However, Interest Expense should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.

What does a high Interest Expense mean?

A high Interest Expense can signal that a stock is expensive relative to its fundamentals. Interest Expense is the amount a company pays on its long-term debt. View historical data on Fortinet and its competitors. Fortinet's current Interest Expense is €-17 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.

Is Fortinet stock overvalued right now?

Based on GuruFocus' analysis, Fortinet (STU:FO8) is currently considered Significantly Overvalued. The stock's GF Value™ is €87.21, compared to a current price of €137.80 — trading 58% above its estimated fair value. The current Interest Expense is €-17 Mil. Fortinet's overall GF Score™ is 91/100 with 5 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.

How is Interest Expense calculated?

Interest Expense is calculated from a company's financial statements. For Fortinet (STU:FO8), the current Interest Expense is €-17 Mil as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Fortinet (STU:FO8) Overvalued in 2026?

Based on GuruFocus' analysis, Fortinet stock appears to be overvalued. The current stock price of €137.80 is trading 58% above its estimated GF Value™ of €87.21. GuruFocus considers Fortinet to be Significantly Overvalued.

Key valuation signals for STU:FO8:

Interest Expense: €-17 Mil
GF Value™: €87.21 vs. price of €137.80 (58% above fair value)
GF Score™: 91/100 with 5 warning signs

No single metric tells the full story. See the STU:FO8 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

Fortinet Business Description

Industry Technology Software

Comparable Companies SNPS NET CRWV XYZ CRWD NTAP TWLO MDB VRSN FFIV MSFT ORCL PLTR PANW HKSE:02513 XAMS:ADYEN CPAY OKTA ZS SZSE:300442

Other Exchanges FTNT:USA FTNT:Mexico 1FTNT:Italy 0IR9:UK FO8:Germany F1TN34:Brazil

Address 909 Kifer Road, Sunnyvale, CA, USA, 94086

Website https://www.fortinet.com

Fortinet is a platform-based cybersecurity vendor with product offerings covering network security, cloud security, zero-trust access, and security operations. The firm derives a majority of its revenue through sales of its subscriptions and support-based business. The California-based firm has more than 800,000 customers across the world.

91GF Score

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Interest Expense is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€137.80

Price

€87.21

GF Value

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