FORM OF ADMINISTRATIVE SERVICES AGREEMENT
Harbour Island Acquisition Corp. I
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HARBOUR ISLAND ACQUISITION CORP. I
****2875 South Ocean Boulevard
Palm Beach, FL 33480
[●], 2026
Re: Administrative Services Agreement
Ladies and Gentlemen:
This letter of agreement by and between Harbour Island Acquisition Corp. I, a Cayman Islands exempted company (the “Company”), and Harbour Island Acquisition Sponsor LLC, a Delaware limited liability company (the “Sponsor”), dated as of the date hereof, will confirm our agreement that, commencing on the date the securities of the Company are first listed on the Global Market tier of The Nasdaq Stock Market (the “Listing Date”), pursuant to a Registration Statement on Form S-1 and prospectus filed with the U.S. Securities and Exchange Commission (the “Registration Statement”) and continuing until the earlier of (a) the consummation by the Company of an initial business combination (as described in the Registration Statement, the “Business Combination”) and (b) the Company’s liquidation (in each case as described in the Registration Statement) (such earlier date hereinafter referred t
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