Gulf Marine Services (LSE:GMS) Effective Interest Rate on Debt %: 5.98% (As of Dec. 2025)

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LSE:GMS Gulf Marine Services PLC LSE:GMS
55 GF Score
Price £0.19
GF Value £0.17
Valuation Modestly Overvalued
! 3 Warning Signs
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What is Gulf Marine Services Effective Interest Rate on Debt %?

Gulf Marine Services LSE:GMS -0.93% 55 Effective Interest Rate on Debt % is 5.98% as of Dec. 2025. GuruFocus rates LSE:GMS with a GF Score™ of 55/100 and a GF Value™ of £0.17 (Modestly Overvalued). The stock has 3 warning signs investors should review.

Effective Interest Rate on Debt % is the usage rate that a borrower actually pays on a debt. It is calculated as the positive value of Interest Expense divided by its average total debt. Total debt equals to Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Gulf Marine Services's annualized positive value of Interest Expense for the quarter that ended in Dec. 2025 was £9.2 Mil. Gulf Marine Services's average total debt for the quarter that ended in Dec. 2025 was £153.4 Mil. Therefore, Gulf Marine Services's annualized Effective Interest Rate on Debt % for the quarter that ended in Dec. 2025 was 5.98%.


Gulf Marine Services  (LSE:GMS) Effective Interest Rate on Debt % Explanation

Effective Interest Rate on Debt % measures the usage rate that a borrower actually pays on a debt.


Gulf Marine Services Effective Interest Rate on Debt % Related Terms


Gulf Marine Services Effective Interest Rate on Debt % Historical Data

* Premium members only.

The historical data trend for Gulf Marine Services's Effective Interest Rate on Debt % can be seen below:

* 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.

Gulf Marine Services Effective Interest Rate on Debt % Chart

Gulf Marine Services Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Effective Interest Rate on Debt %
Get a 7-Day Free Trial Premium Member Only Premium Member Only 4.47 5.10 9.52 8.50 5.65

Gulf Marine Services Semi-Annual Data
Jun16 Dec16 Jun17 Dec17 Jun18 Dec18 Jun19 Dec19 Jun20 Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25
Effective Interest Rate on Debt % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 8.97 8.91 8.30 6.22 5.98

LSE:GMS vs SLB, BKR, HAL: Effective Interest Rate on Debt % Comparison

For the Oil & Gas Equipment & Services subindustry, Gulf Marine Services's Effective Interest Rate on Debt %, along with its competitors' market caps and Effective Interest Rate on Debt % data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Gulf Marine Services Effective Interest Rate on Debt % vs Oil & Gas Industry

For the Oil & Gas industry and Energy sector, Gulf Marine Services's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where Gulf Marine Services's Effective Interest Rate on Debt % falls into.


LSE:GMS
55GF Score
Gulf Marine Services PLC LSE:GMS
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
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Gulf Marine Services Effective Interest Rate on Debt % Calculation

Gulf Marine Services's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Dec. 2024 )+Total Debt  (A: Dec. 2025 ))/ count )
=-1  *  -9.891/( (190.143+160.268)/ 2 )
=-1  *  -9.891/175.2055
=5.65 %

where

Total Debt  (A: Dec. 2024 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=156.051 + 34.092
=190.143

Total Debt  (A: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=119.563 + 40.705
=160.268

Gulf Marine Services's annualized Effective Interest Rate on Debt % for the quarter that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Jun. 2025 )+Total Debt  (Q: Dec. 2025 ))/ count )
=-1  *  -9.168/( (146.536+160.268)/ 2 )
=-1  *  -9.168/153.402
=5.98 %

where

Total Debt  (Q: Jun. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=119.756 + 26.78
=146.536

Total Debt  (Q: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=119.563 + 40.705
=160.268

* 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.

In the calculation of annual Effective Interest Rate on Debt %, the Interest Expense of the last fiscal year and the average total debt over the fiscal year are used. In calculating the quarterly data, the Interest Expense data used here is two times the semi-annual (Dec. 2025) interest expense data. Effective Interest Rate on Debt % is displayed in the 30-year financial page.

What does a Effective Interest Rate on Debt % of 5.98% mean?
Gulf Marine Services (LSE:GMS) has a Effective Interest Rate on Debt % of 5.98% as of Dec. 2025. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Gulf Marine Services and its competitors.
Is Gulf Marine Services' Effective Interest Rate on Debt % too high?
Gulf Marine Services' current Effective Interest Rate on Debt % is 5.98%. Overall, Gulf Marine Services has a GF Score™ of 55/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Gulf Marine Services' Effective Interest Rate on Debt % compare to SLB and BKR?
Gulf Marine Services' Effective Interest Rate on Debt % of 5.98% can be compared against companies in the Oil & Gas industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Effective Interest Rate on Debt % for an Oil & Gas company?
A good Effective Interest Rate on Debt % depends on the Oil & Gas industry context. However, Effective Interest Rate on Debt % 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 Effective Interest Rate on Debt % mean?
A high Effective Interest Rate on Debt % can signal that a stock is expensive relative to its fundamentals. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Gulf Marine Services and its competitors. Gulf Marine Services's current Effective Interest Rate on Debt % is 5.98%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Gulf Marine Services stock overvalued right now?
Based on GuruFocus' analysis, Gulf Marine Services (LSE:GMS) is currently considered Modestly Overvalued. The stock's GF Value™ is £0.17, compared to a current price of £0.19 — trading 12.8% above its estimated fair value. The current Effective Interest Rate on Debt % is 5.98%. Gulf Marine Services' overall GF Score™ is 55/100 with 3 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Effective Interest Rate on Debt % calculated?
Effective Interest Rate on Debt % is calculated from a company's financial statements. For Gulf Marine Services (LSE:GMS), the current Effective Interest Rate on Debt % is 5.98% as of Dec. 2025. 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 Gulf Marine Services (LSE:GMS) Overvalued in 2026?

Based on GuruFocus' analysis, Gulf Marine Services stock appears to be overvalued. The current stock price of £0.19 is trading 12.8% above its estimated GF Value™ of £0.17. GuruFocus considers Gulf Marine Services to be Modestly Overvalued.

Key valuation signals for LSE:GMS:

  • Effective Interest Rate on Debt %: 5.98%
  • GF Value™: £0.17 vs. price of £0.19 (12.8% above fair value)
  • GF Score™: 55/100 with 3 warning signs

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


Gulf Marine Services Business Description

Industry EnergyOil & Gas
Other Exchanges GMSl:UKG0M:Germany
Address P.O. Box 46046, Abu Dhabi, ARE
Gulf Marine Services PLC is a United Kingdom-based operator of self-propelled and self-elevating support vessels (SESVs). Its assets provide a stable platform for the delivery of a range of services performed by the company's clients throughout the total lifecycle of offshore oil, gas, and renewable energy activities. Its operating business segments include Six K-Class vessels, which include the Kamikaze, Kikuyu, Kawawa, Kudeta, Keloa, and Pepper vessels; Three S-Class vessels, which include the Shamal, Scirocco, and Sharqi vessels; Five E-Class vessels, which include the Endeavour, Endurance, Enterprise, and Evolution vessels; and the Other vessels segment.
55GF Score

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Effective Interest Rate on Debt % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

£0.19
Price
£0.17
GF Value