Accounting Policies, by Policy (Policies)	3 Months Ended
Jan. 31, 2026
Summary of significant accounting policies [Abstract]
Basis of accounting	Basis of accounting - The accompanying financial statements of North European Oil Royalty Trust (the “Trust”) are prepared in accordance with the rules and regulations of the Securities and Exchange Commission. Financial statement balances and financial results are presented on a modified cash basis of accounting, which is a comprehensive basis of accounting other than accounting principles generally accepted in the United States (“GAAP basis”). In the opinion of management, all adjustments that are considered necessary for a fair presentation of these financial statements, including adjustments of a normal, recurring nature, have been included. On a modified cash basis, revenue is earned when cash is received and expenses are incurred when cash is paid. GAAP basis financial statements disclose revenue as earned and expenses as incurred, without regard to receipts or payments. The modified cash basis of accounting is utilized to permit the accrual for distributions to be paid to unit owners (those distributions approved by the Trustees for the Trust). The Trust’s distributable income represents royalty income received by the Trust during the period plus interest income less any expenses incurred by the Trust, all on a cash basis. In the opinion of the Trustees, the use of the modified cash basis of accounting provides a more meaningful presentation to unit owners of the results of operations of the Trust. The results of any interim period are not necessarily indicative of the results to be expected for the fiscal year. These financial statements should be read in conjunction with the financial statements that were included in the Trust’s Annual Report on Form 10-K for the year ended October 31, 2025 (the “2025 Form 10-K”). The Statements of Assets, Liabilities and Trust Corpus included herein contain information from the Trust’s 2025 Form 10-K.
Producing gas and oil royalty right	Producing gas and oil royalty rights - The rights to certain gas and oil royalties in Germany were transferred to the Trust at their net book value by North European Oil Company (the “Company”) (see Note 2).The net book value of the royalty rights has been reduced to one dollar ($1) in view of the fact that the remaining net book value of royalty rights is de minimis relative to annual royalties received and distributed by the Trust and does not bear any meaningful relationship to the fair value of such rights or the actual amount of proved producing reserves.
Federal and state income taxes	Federal and state income taxes - The Trust, as a grantor trust, is exempt from federal income taxes under a private letter ruling issued by the Internal Revenue Service. The Trust has no state income tax obligations.
Cash and cash equivalents	Cash and cash equivalents - Cash and cash equivalents are defined as amounts deposited in bank accounts and amounts invested in certificates of deposit and U.S. Treasury bills with original maturities generally of three months or less from the date of purchase. The investment options available to the Trust are limited in accordance with specific provisions of the Trust Agreement. In addition, the Trust held Euros 15,000, the equivalent of $17,785, in its German bank account at January 31, 2026.
Net income per unit	Net income per unit - Net income per unit is based upon the number of units outstanding at the end of the period. As of both January 31, 2026 and 2025, there were 9,190,590 units of beneficial interest outstanding.
New accounting pronouncements	New accounting pronouncements - The Trust is not aware of any recently issued, but not yet effective, accounting standards that would be expected to have a significant impact on the Trust’s financial position or results of operations.

Accounting Policies, by Policy (Policies)

3 Months Ended

Jan. 31, 2026

Summary of significant accounting policies [Abstract]

Basis of accounting -

The accompanying financial statements of North European Oil Royalty Trust (the “Trust”) are prepared in accordance with the rules and regulations of the Securities and Exchange Commission. Financial statement balances and financial results are presented on a modified cash basis of accounting, which is a comprehensive basis of accounting other than accounting principles generally accepted in the United States (“GAAP basis”). In the opinion of management, all adjustments that are considered necessary for a fair presentation of these financial statements, including adjustments of a normal, recurring nature, have been included.

On a modified cash basis, revenue is earned when cash is received and expenses are incurred when cash is paid. GAAP basis financial statements disclose revenue as earned and expenses as incurred, without regard to receipts or payments. The modified cash basis of accounting is utilized to permit the accrual for distributions to be paid to unit owners (those distributions approved by the Trustees for the Trust). The Trust’s distributable income represents royalty income received by the Trust during the period plus interest income less any expenses incurred by the Trust, all on a cash basis. In the opinion of the Trustees, the use of the modified cash basis of accounting provides a more meaningful presentation to unit owners of the results of operations of the Trust.

The results of any interim period are not necessarily indicative of the results to be expected for the fiscal year. These financial statements should be read in conjunction with the financial statements that were included in the Trust’s Annual Report on Form 10-K for the year ended October 31, 2025 (the “2025 Form 10-K”). The Statements of Assets, Liabilities and Trust Corpus included herein contain information from the Trust’s 2025 Form 10-K.

Producing gas and oil royalty right

Producing gas and oil royalty rights -

The rights to certain gas and oil royalties in Germany were transferred to the Trust at their net book value by North European Oil Company (the “Company”) (see Note 2).The net book value of the royalty rights has been reduced to one dollar ($1) in view of the fact that the remaining net book value of royalty rights is de minimis relative to annual royalties received and distributed by the Trust and does not bear any meaningful relationship to the fair value of such rights or the actual amount of proved producing reserves.

Federal and state income taxes

Federal and state income taxes -

The Trust, as a grantor trust, is exempt from federal income taxes under a private letter ruling issued by the Internal Revenue Service. The Trust has no state income tax obligations.

Cash and cash equivalents

Cash and cash equivalents -

Cash and cash equivalents are defined as amounts deposited in bank accounts and amounts invested in certificates of deposit and U.S. Treasury bills with original maturities generally of three months or less from the date of purchase. The investment options available to the Trust are limited in accordance with specific provisions of the Trust Agreement. In addition, the Trust held Euros 15,000, the equivalent of $17,785, in its German bank account at January 31, 2026.

Net income per unit

Net income per unit -

Net income per unit is based upon the number of units outstanding at the end of the period. As of both January 31, 2026 and 2025, there were 9,190,590 units of beneficial interest outstanding.

New accounting pronouncements

New accounting pronouncements -

The Trust is not aware of any recently issued, but not yet effective, accounting standards that would be expected to have a significant impact on the Trust’s financial position or results of operations.

- Definition

Disclosure of accounting policy for income taxes, which may include its accounting policies for recognizing and measuring deferred tax assets and liabilities and related valuation allowances, recognizing investment tax credits, operating loss carryforwards, tax credit carryforwards, and other carryforwards, methodologies for determining its effective income tax rate and the characterization of interest and penalties in the financial statements.

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