Exhibit (n)(1)

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Consent of Independent Registered Public Accounting Firm

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We consent to the incorporation by reference in this Pre-Effective Amendment No. 1 to the Registration Statement (No. 333-284781) on Form N-2 of Runway Growth Finance Corp. (the Company) of our report dated March 7, 2024, relating to the consolidated financial statements of the Company, appearing in the Annual Report on Form 10-K of the Company for the year ended December 31, 2023.

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We also consent to the reference to our firm under the headings “Independent Registered Public Accounting Firm” and “Senior Securities” in such Prospectus.

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/s/ RSM US LLP

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Chicago, Illinois

March 18, 2025