Company: QTIWW
Filing Date: 2025-12-31
Form Type: 424B3
Source: 0001628280-25-059235
Chunk: 331

Company: QT IMAGING HOLDINGS, INC.
Filing Date: 2025-12-31
Form: 424B3
Chunk 331
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     | $ | 40,355 |

The Company had no contract assets as of December 31, 2024 and 2023. The Company had contract liabilities of $49,365 as of December 31, 2024. The Company had contract liabilities of $347,619 as of December 31, 2023. Revenue recognized during the year ended December 31, 2024 that was previously included in contract liabilities as of December 31, 2023 was $39,683, while a $300,000 customer deposit previously deferred was refunded due to an order cancellation during the year ended December 31, 2024.

#### Shipping and Handling Costs
Shipping and handling activities are typically performed before the customer obtains control of the goods, and the related costs are therefore expensed as incurred. Shipping and handling costs are included in cost of revenue in the accompanying consolidated statements of operations and comprehensive loss. Shipping and handling costs incurred for inventory purchases are expensed in cost of revenue when sold.

<div align='center'>F-16</div>

#### QT IMAGING HOLDINGS, INC.

### Notes to Consolidated Financial Statements

#### Product Warranty
The Company’s products sold to customers are generally subject to warranties up to twelve months, which provides for the repair or replacement of products, at the Company’s option, that fail to perform with stated specifications. The Company estimates future warranty obligations related to those products. To date, product warranty claims have not been significant.

#### Research and Development Costs
Research and development costs incurred by the Company include salaries, purchased services, operating materials and supplies, depreciation, and amortization, and are expensed as incurred. These costs amounted to $3,267,340 and $1,485,636 for the years ended December 31, 2024 and 2023, respectively.

#### Advertising
Advertising and promotion costs are expensed as incurred. Advertising expenses were not significant for the years ended December 31, 2024 and 2023.

#### Grant Income
Periodically, the Company is awarded grants on a cost reimbursement basis. Costs are expensed when incurred and reimbursable on a monthly or quarterly basis with the offset booked as a contra-expense to the applicable functional area in the consolidated statements of operations and comprehensive loss.

#### Income Taxes
Deferred tax assets and liabilities are determined based on the differences between financial reporting and the tax basis of assets and liabilities and are measured using the enacted tax rates and laws that will be in effect when the differences are expected to