Item 7A. Quantitative and Qualitative Disclosures About Market Risk
Item 7A. Quantitative and qualitative disclosures about market risk
Market risk
Concentration of market risk. We derive a substantial portion of our revenue from providing services to tax-advantaged healthcare account holders. A significant downturn in this market or changes in state and/or federal laws impacting the preferential tax treatment of healthcare accounts such as HSAs could have a material adverse effect on our results of operations. During the fiscal years ended January 31, 2022, 2021, and 2020, no one customer accounted for greater than 10% of our total revenue. We monitor market and regulatory changes regularly and make adjustments to our business if necessary.
Inflation. Inflationary factors may adversely affect our operating results. Although we do not believe that inflation has had a material impact on our financial position or results of operations to date, the current high rate of inflation may have an adverse effect on our ability to maintain current levels of expenses as a percentage of revenue if our revenue does not correspondingly increase with inflation.
Concentration of credit risk
Financial instruments, which potentially subject us to concentrations of credit risk, consist primarily of cash and cash equivalents. We maintain our cash and cash equivalents in bank and other depository accounts, which frequently may exceed federally insured limits. Our cash and cash equivalents as of January 31, 2022 were $225.4 million, the vast majority of which was not covered by federal depository insurance. We have not experienced any material losses in such accounts and believe we are not exposed to any significant credit risk with respect to our cash and cash equivalents. Our accounts receivable balance as of January 31, 2022 was $87.4 million. We have not experienced any significant write-offs to our accounts receivable and believe that we are not exposed to significant
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credit risk with respect to our accounts receivable; however, the extent to which the ongoing COVID-19 pandemic will negatively impact our credit risk remains highly uncertain and cannot be accurately predicted. We continue to monitor our credit risk and place our cash and cash equivalents with reputable financial institutions.
Interest rate risk
HSA Assets and Client-held funds. HSA Assets consist of custodial HSA funds we hold in custody on behalf of our members. As of January 31, 2022, we held in custody HSA Assets of approximately $19.6 billion. As a non-bank custodian, we contract with our Depository Partners and insurance company partners to hold custodial cash assets on behalf of our members, and we earn a significant portion of our total revenue from interest paid to us by these partners. Custodial cash assets held by our insurance company partners are held in group annuity contracts or similar arrangements. The lengths of our agreements with Depository Partners typically range from three to five years and have either fixed or variable interest rates. As HSA Assets increase and existing contracts with Depository Partners expire, we seek to enter into new contracts with Depository Partners, the terms of which are impacted by the then-prevailing interest rate environment. The diversification of HSA Assets placed among our Depository Partners and insurance company partners, and varied contract terms, substantially reduces our exposure to short-term fluctuations in prevailing interest rates and mitigates the short-term impact of a sustained increase or decline in prevailing interest rates on our custodial revenue. A sustained decline in prevailing interest rates may negatively affect our business by reducing the size of the interest rate yield, or yield, available to us and thus the amount of the custodial revenue we can realize. Conversely, a sustained increase in prevailing interest rates can increase our yield. An increase in our yield would increase our custodial revenue as a percentage of total revenue. In addition, if our yield increases, we expect the spread to also increase between the interest offered to us by our Depository Partners and insurance company partners and the interest retained by our members, thus increasing our profitability. However, we may be required to increase the interest retained by our members in a rising prevailing interest rate environment. Changes in prevailing interest rates are driven by macroeconomic trends and government policies over which we have no control, such as the interest rate cuts by the Federal Reserve associated with the ongoing COVID-19 pandemic.
Client-held funds are interest earning deposits from which we generate custodial revenue. As of January 31, 2022, we held Client-held funds of $897 million. These deposits are amounts remitted by Clients and held by us on their behalf to pre-fund and facilitate administration of our other CDBs. These deposits are held with Depository Partners. We deposit the Client-held funds with our Depository Partners in interest-bearing, demand deposit accounts that have a floating interest rate and no set term or duration. A sustained decline in prevailing interest rates may negatively affect our business by reducing the size of the yield available to us and thus the amount of the custodial revenue we can realize from Client-held funds. Changes in prevailing interest rates are driven by macroeconomic trends and government policies over which we have no control.
Cash and cash equivalents . We consider all highly liquid investments purchased with an original maturity of three months or less to be unrestricted cash equivalents. Our unrestricted cash and cash equivalents are held in institutions in the U.S. and include deposits in a money market account that is unrestricted as to withdrawal or use. As of January 31, 2022, we had unrestricted cash and cash equivalents of $225.4 million. Due to the short-term nature of these instruments, we believe that we do not have any material exposure to changes in the fair value of our cash and cash equivalents as a result of changes in interest rates.
Long-term debt. As of January 31, 2022, we had $350.0 million outstanding under our Term Loan Facility and no amounts drawn under our Revolving Credit Facility. Our overall interest rate sensitivity under these credit facilities is primarily influenced by any amounts borrowed and the prevailing interest rates on these instruments. The interest rate on our Term Loan Facility and Revolving Credit Facility is variable and was 1.88% at January 31, 2022. Accordingly, we may incur additional expense if interest rates increase in future periods. For example, a one percent increase in the interest rate on the amount outstanding under our credit facilities at January 31, 2022 would result in approximately $3.5 million of additional interest expense over the next 12 months. The interest rate on our $600 million of unsecured Senior Notes due 2029 is fixed at 4.50%.
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