Notes to the Unaudited Consolidated Financial Statements

Note 1: Summary of Significant Accounting Policies

The accompanying unaudited consolidated financial statements (“the financial statements”) have been prepared in conformity with accounting principles generally accepted in the United States of America (“U.S. GAAP”) and conform to practices within the banking industry. The accounting policies followed in the preparation of the interim consolidated financial statements are consistent with those used in the preparation of the annual financial statements. The interim consolidated financial statements reflect all normal and recurring adjustments that are necessary, in the opinion of management, for fair statement of results for the interim periods presented. Results for the period ended September 30, 2021, are not necessarily indicative of the results that may be expected for the year ending December 31, 2021.

Nature of Operations

NSTS Bancorp, Inc. was formed to serve as the stock holding company for North Shore Trust and Savings (the “Bank”) in connection with the conversion of North Shore Trust and Savings, NSTS Financial Corporation and North Shore MHC (collectively, the “Company,” “we” or “our”), into the stock form of organization. As of September 30, 2021, the reorganization had not been completed and the NSTS Bancorp, Inc. had no assets or liabilities and had not conducted any business activities other than organizational activities. Accordingly, the unaudited financial statements and other financial information contained in this Quarterly Report on Form 10-Q relate solely to the consolidated financial results of North Shore MHC, NSTS Financial Corporation and North Shore Trust and Savings.

The unaudited financial statements and other financial information contained in this Quarterly Report on Form 10-Q should be read in conjunction with the audited financial statements, and related notes, of North Shore MHC at and for the year ended December 31, 2020 contained in the NSTS Bancorp, Inc.’s definitive prospectus dated November 10, 2021 (the “Prospectus”), as filed with the Securities and Exchange Commission pursuant to Securities Act Rule 424(b)(3) on November 12, 2021.

The Bank operates primarily in the northern suburbs of Chicago, Illinois. The Bank offers a variety of financial services to customers in the surrounding community. Financial services consist primarily of 1-4 family mortgage loans, savings accounts, and certificate of deposit accounts. There are no significant concentrations of loans to any one industry or customer. The Bank’s exposure to credit risk is significantly affected by changes in the economy in the Bank’s market area.

All significant intercompany balances and transactions have been eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. Actual results may vary from those estimates.

The determination of the adequacy of the allowance for loan losses is based on estimates that are particularly susceptible to significant changes in the economic environment and market conditions. In connection with the determination of the estimated losses on loans, management obtains independent appraisals for significant collateral.

The Bank’s loans are generally secured by specific items of collateral including real property, consumer assets, and business assets. Although the Bank has a diversified loan portfolio, a substantial portion of its debtors’ ability to honor their contracts is dependent on local economic conditions.

While management uses available information to recognize losses on loans, further reductions in the carrying amounts of loans may be necessary based on changes in local economic conditions. In addition, regulatory agencies, as an integral part of their examination process, periodically review the estimated losses on loans. Such agencies may require the Bank to recognize additional losses based on their judgments of information available to them at the time of their examination. Due to these factors, it is reasonably possible that the estimated losses on loans may change materially in the near term. However, the amount of the change that is reasonably possible cannot be estimated.

Additional material estimates that are particularly susceptible to significant change in the near term include the determination of the valuation allowance on deferred tax assets and the valuation of investment securities and the related tax effect.

Comprehensive Income (Losses)

Comprehensive income includes net income (losses) and other changes in net worth which bypass the statement of operations. For all periods presented, other comprehensive income includes only one additional component, the change in unrealized gains on available-for-sale investment securities.

Cash and Cash Equivalents

For purposes of reporting cash flows, cash and cash equivalents includes cash on hand and amounts due from banks, including cash items in process of clearing.

Time Deposits with Other Financial Institutions

Time deposits with other financial institutions are carried at cost and generally mature within the next two years.

Investment Securities

Securities are classified as available-for-sale and recorded at fair value, with unrealized gains and losses excluded from earnings and reported in other comprehensive income (loss). Discounts are accreted into interest income over the estimated life of the related security and premiums are amortized into income over the earlier of the call date or weighted average life of the related security using the level yield method. Gains and losses on the sale of securities are recorded on the trade date and are determined using the specific identification method.

Securities available-for-sale are securities that are intended to be held for indefinite periods of time, but which may not be held to maturity. These securities may be used as a part of the Bank’s asset/liability management strategy and may be sold in response to changes in interest rates, deterioration of issuer’s creditworthiness, or due to a desire to increase capital or liquidity.

The Bank conducts a periodic review of available-for-sale securities with declines in fair value below their cost to evaluate if the impairment is other than temporary. In estimating other-than-temporary impairment losses, management considers (1) the length of time and the extent to which the fair value has been less than amortized cost, (2) the financial condition and near-term prospects of the issuer, and (3) the intent and ability of the Bank to retain its investment in the issuer for a period of time sufficient to allow for any anticipated recovery in fair value. Credit-related impairments of debt securities are recorded through earnings, and any impairment as a result of other factors is included in accumulated other comprehensive income.

Federal Home Loan Bank of Chicago Stock

The Bank, as a member of the Federal Home Loan Bank of Chicago (FHLB), is required to maintain an investment in capital stock of the FHLB. Based on redemption provisions of the FHLB, the stock has no quoted market price and is carried at cost of $550,000 and $512,000 at September 30, 2021 and December 31, 2020, respectively, and is evaluated for impairment at each reporting date.

Loans Held for Sale

Mortgage loans originated and intended for sale in the secondary market are carried at fair value, as determined by outstanding commitments from investors. Net unrealized losses, if any, are recorded as a valuation allowance and charged to earnings. Mortgage loans held for sale are generally sold with servicing rights released. Gains or losses are recognized through earnings.

Loans

The Bank’s loan portfolio includes segments for mortgage loans and consumer loans. Mortgage loans include classes for 1-4 family, multi-family, and commercial.

Loans that management has the intent and ability to hold for the foreseeable future or until maturity or pay-off generally are reported at their outstanding unpaid principal balances adjusted for charge offs, the allowance for loan losses, and any deferred fees or costs on originated loans. Interest income is accrued on the unpaid principal balance. Loan origination fees, net of certain direct origination costs, are deferred and recognized as an adjustment to the related loan yield using the interest method, adjusted for prepayments.

The accrual of interest on all loans is discontinued at the time the loan is 90 days past due unless the credit is well-secured and in process of collection. Past due status is based on contractual terms of the loan. In all cases, loans are placed on nonaccrual if collection of principal or interest is considered doubtful. All interest accrued but not collected for loans that are placed on nonaccrual is reversed against interest income. The interest on these loans is accounted for on the cash-basis or cost-recovery method, until the loans qualify for return to accrual. Loans are returned to accrual status when payment of all the principal and interest amounts contractually due is reasonably assured.

Allowance for Loan Losses

The allowance for loan losses (the “allowance”) is established as losses are estimated to have occurred through a provision for loan losses charged to earnings. Loan losses are charged against the allowance when management believes the uncollectibility of a loan balance is confirmed. Subsequent recoveries, if any, are credited to the allowance.

The allowance for loan losses is evaluated on a regular basis by management. This evaluation is inherently subjective as it requires estimates that are susceptible to significant revision as more information becomes available. The allowance consists of general and allocated components, as further described below.

General Component

The general component of the allowance for loan losses is based on historical loss experience adjusted for qualitative factors stratified by the following loan segments: first mortgage loans and consumer and other loans. Management uses an average of historical losses based on a time frame appropriate to capture relevant loss data for each loan segment. This historical loss factor is adjusted for the following qualitative factors: levels/trends in delinquencies; trends in volume and terms of loans; effects of changes in risk selection and underwriting standards, and other changes in lending policies, procedures and practices; experience/ability/depth of lending management and staff; and national and local economic trends and conditions.

The qualitative factors are determined based on the various risk characteristics of each loan segment. Risk characteristics relevant to each portfolio segment are as follows:

Mortgage Loans

Loans in this segment are made to individuals and commercial borrowers. The loans are secured by real estate with the Bank typically in a first lien position. The Bank generally does not originate loans with a loan-to-value ratio greater than 80% unless mortgage insurance is obtained and generally does not grant loans that would be classified as subprime upon origination. The overall health of the economy, including unemployment rates and housing prices, will have an effect on the credit quality in this segment.

Consumer Loans

Loans in this segment are generally to individuals and are supported by non-real estate collateral, such as deposit accounts and personal property. Unsecured loans are also included in this segment. Repayment is dependent on the credit quality of the individual borrower or borrowers.

Allocated Component

The allocated component relates to loans that are classified as impaired. Based on internal ratings, loans are evaluated for impairment on a loan-by-loan basis. Impairment is measured by either the present value of expected future cash flows discounted at the loan’s effective interest rate or the fair value of the collateral if the loan is collateral dependent. An allowance is established when the discounted cash flows (or collateral value) of the impaired loan is lower than the carrying value of that loan.

A loan is considered impaired when, based on current information and events, it is probable that the Bank will be unable to collect the scheduled payments of principal or interest when due according to the contractual terms of the loan agreement. Factors considered by

management in determining impairment include payment status, collateral value, and the probability of collecting scheduled principal and interest payments when due. Loans that experience insignificant payment delays and payment shortfalls generally are not classified as impaired. Management determines the significance of payment delays and payment shortfalls on a case-by-case basis, taking into consideration all circumstances surrounding the loan and borrower, including the length of the delay, reasons for the delay, the borrower’s prior payment record, and the amount of the shortfall in relation to the amount of principal and interest owed.

The Bank periodically may agree to modify the contractual terms of loans. When a loan is modified and a concession is made to a borrower experiencing financial difficulty, the modification is considered a troubled debt restructuring (TDR). All TDRs are classified as impaired and management performs an impairment analysis at the time of restructuring.

Premises and Equipment

Land is stated at cost. Property, improvements, and equipment are stated at cost less accumulated depreciation. Depreciation is determined under the straight-line method over the following estimated useful lives of assets:

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Income Taxes

We record our tax provision or benefit on an interim basis using the estimated annual effective tax rate. This rate is applied to the current period ordinary income or loss to determine the income tax provision or benefit allocated to the interim period. The estimated annual effective tax rate may be significantly affected by nondeductible expenses and certain tax preference items. Adjustments to the estimated annual effective income tax rate are recognized in the period during which such estimates are revised.

Deferred taxes are recognized using the asset/liability method. Deferred tax assets are recognized for deductible temporary differences, operating loss and tax credit carryforwards; deferred tax liabilities are recognized for taxable temporary differences. Temporary differences are the differences between the financial statement amounts of existing assets and liabilities and their respective tax bases. Deferred tax assets are reduced by a valuation allowance when, in the opinion of management, it is more likely than not that some portion or all of the deferred tax assets will not be realized. Deferred tax assets and liabilities are adjusted for the effects of changes in tax laws and rates on the date of enactment.

When tax returns are filed, it is highly certain that some positions taken would be sustained upon examination by the taxing authorities, while others are subject to uncertainty about the merits of the position taken or the amount of the position that would be ultimately sustained. The benefit of a tax position is recognized in the financial statements in the period during which, based on all available evidence, management believes it is more likely than not that the position will be sustained upon examination, including the resolution of appeals or litigation processes, if any. Tax positions taken are not offset or aggregated with other positions. Tax positions that meet the more-likely-than-not recognition threshold are measured as the largest amount of tax benefit that is more than 50% likely of being realized upon settlement with the applicable taxing authority. The portion of the benefits associated with tax positions taken that exceed the amount measured as described above, if any, is reflected as a liability for unrecognized tax benefits in the accompanying balance sheet, along with any associated interest and penalties that would be payable to the taxing authorities upon examination.

Interest and penalties associated with unrecognized tax benefits, if any, are classified as additional income taxes in the statement of operations. Bank management believes that the Bank maintains no uncertain tax positions for tax reporting purposes and accordingly, no liability is required to be recorded.

The Bank is subject to U.S. federal income tax as well as income tax of the States of Illinois and Wisconsin.

Other Real Estate Owned

Property acquired in satisfaction of debt or through foreclosure is carried at the lower of cost or market value less estimated costs to sell. At foreclosure, if the fair value of the property acquired is less than the recorded investment in the related loan, a reduction in the

carrying amount of the loan is recognized with a charge to the allowance for loan losses. The cost of carrying the assets subsequent to foreclosure and any decrease in the market value occurring after that date are charged to operating expenses as incurred.

Bank-owned Life Insurance

The Bank purchased life insurance policies on certain key executives. Bank-owned life insurance is recorded at the amount estimated to be realized under the insurance contract at the balance sheet date, which is the cash surrender value adjusted for other charges or amounts due which are probable at settlement.

Service Charges on Deposits

Service charges on deposits represent general service fees for monthly account maintenance and activity or transaction-based fees and consist of transaction-based revenue, time-based revenue (service period), item-based revenue, or some other individual attribute-based revenue. Revenue is recognized when the Bank’s performance obligation is completed, which is generally monthly for account maintenance services or when a transaction has been completed (such as a wire transfer). Payment for such performance obligations are generally received at the time performance obligations are satisfied.

Accounting Developments

Accounting for Leases

The FASB amended its standard related to the accounting for leases. Under the new standard, lessees will now be required to recognize substantially all leases on the balance sheet as both a right-of-use asset and a liability. The standard has two types of leases for income statement recognition purposes: operating leases and finance leases. Operating leases will result in the recognition of a single lease expense on a straight-line basis over the lease term similar to the treatment for operating leases under existing standards. Finance leases will result in an accelerated expense similar to the accounting for capital leases under existing standards. The determination of lease classification as operating or finance will be done in a manner similar to existing standards.

The new standard also contains amended guidance regarding the identification of embedded leases in service contracts and the identification of lease and non-lease components in an arrangement. The new standard is effective for annual periods beginning after December 15, 2021, and any interim periods within annual reporting periods that begin after December 15, 2022. The Bank has reviewed the amendment and determined it will not have a material impact on the Bank’s financial statements.

Accounting for Financial Instruments – Credit Losses

The FASB issued ASU No. 2016-13, Financial Instruments— Credit Losses (Topic 326). The ASU introduces a new credit loss model, the current expected credit loss model (CECL), which requires earlier recognition of credit losses, while also providing additional transparency about credit risk.

The CECL model utilizes a lifetime “expected credit loss” measurement objective for the recognition of credit losses for loans, held-to-maturity securities, and other receivables at the time the financial asset is originated or acquired. The expected credit losses are adjusted each period for changes in expected lifetime credit losses. For available for-sale securities where fair value is less than cost, credit-related impairment, if any, will be recognized in an allowance for credit losses and adjusted each period for changes in expected credit risk. This model replaces the multiple existing impairment models, which generally require that a loss be incurred before it is recognized.

The CECL model represents a significant change from existing practice and may result in material changes to the Bank’s accounting for financial instruments. The Bank is evaluating the effect ASU 2016-13 will have on its consolidated financial statements and related disclosures. The impact of the ASU will depend upon the final standard (as amended), the state of the economy, and the nature of the Bank’s portfolios at the date of adoption. For the Bank, the new standard is effective January 2023.