Complete Guide to Estimated Tax Payments for Small and Medium-Sized Auto Dealers: From Reducing the Burden to Financial Planning

Estimated tax payment is a system where you pay a portion of your income tax and special income tax for reconstruction in advance when your estimated tax base amount, calculated based on the previous year's income and tax amount, is 150,000 yen or more. This system aims to reduce the temporary tax burden during final tax returns and stabilize national revenue.

In the automobile sales industry, due to high vehicle unit prices and relatively high profit margins, even sole proprietors often become subject to estimated tax payments. For corporations, estimated tax payment obligations arise when the previous year's corporate tax amount exceeds 200,000 yen.

In principle, those subject to estimated tax payment are individuals whose previous year's income tax amount (estimated tax base amount) exceeds 150,000 yen. In the automobile sales industry, particular attention is needed in the following situations:

Eligible individuals will receive a "Notice of Estimated Income Tax and Special Income Tax for Reconstruction Payment Amount" from the tax office in mid-June each year.

The automobile sales industry has tax peculiarities that differ from general businesses. Particularly important is the handling of prorated automobile tax and compulsory automobile liability insurance premiums.

In used car transactions, prorated automobile tax and compulsory insurance premiums are treated as taxable transactions. This is because automobile tax is levied on the owner as of April 1st, and since the buyer has no tax obligation, the prorated amount paid by the buyer is considered part of the purchase price.

In principle, the estimated tax payment amount uses the previous year's income tax amount as the estimated tax base amount, and two-thirds of that becomes the annual estimated tax payment. Since this is paid in two installments, each payment is one-third of the estimated tax base amount.

Calculation example:

If the previous year's income tax amount was 300,000 yen:

Below is a calculation example for a sole proprietor operating a used car sales business9:

Business income:  8,000,000 yenSalary income:  0 yen (full-time business)Total income deductions:  1,200,000 yenWithholding tax amount:  200,000 yen

In this case, estimated tax payments of 252,000 yen each (756,000 yen ÷ 3) are required for the first and second periods.

Estimated tax payments are made twice a year.

First period:  July 1 to July 31Second period:  November 1 to November 30

In the automobile sales industry, July coincides with the summer bonus sales season and November with year-end sales preparations, so special attention to cash flow is required.

There are various methods for paying estimated taxes.

Direct Payment (e-Tax account transfer)

Internet Banking

Transfer Tax Payment

Credit Card Payment

Smartphone App Payment (300,000 yen or less)

Convenience Store Payment (300,000 yen or less)

Since the automobile sales industry experiences significant seasonal sales fluctuations, we recommend using transfer tax payment. When using transfer tax payment, amounts are automatically withdrawn from your account on July 31 for the first period and November 30 for the second period.

Reduction applications for estimated tax payments are possible in the following situations:

In the automobile sales industry, reduction applications can be considered in the following situations:

Reduction application deadlines are as follows:

Use the "Application for Reduction of Estimated Tax Payment Amount" form and submit it to your local tax office. Results of approval, partial approval, or rejection will be notified in writing or via e-Tax.

If estimated tax is not paid by the deadline, late payment tax will be imposed. The 2025 late payment tax rates are as follows:

If 500,000 yen estimated tax payment is delayed by 30 days:

500,000 yen × 2.4% ÷ 365 days × 30 days = approximately 986 yen

While this amount is not particularly high, considering credit risks, payment by the deadline is important.

In the automobile sales industry, consumption tax processing can be complex. The following items require special attention:

Items treated as taxable transactions

Items treated as tax-exempt transactions

Items treated as non-taxable transactions

In used car sales, processing of automobile tax on inventory vehicles is also important. For vehicles held as inventory as of April 1st, the seller bears the automobile tax.

This automobile tax can be either included in the vehicle acquisition cost or recorded as taxes and public charges as an expense, but the principle of consistent application applies.

In the automobile sales industry, it is important to understand the annual tax schedule including estimated tax payments in advance and incorporate it into your financial plan.

Major Tax Schedule

To prepare for estimated tax payments, we recommend opening a tax-dedicated account and regularly setting aside a certain percentage of sales. As a guideline, it's safe to reserve about 5-10% of sales as tax preparation funds.

As a measure that combines business owner retirement fund preparation and tax savings, consider utilizing small business mutual aid. You can pay premiums up to 70,000 yen per month, and the full amount is deductible.

For corporations, estimated tax payment is required when the previous year's corporate tax amount exceeds 200,000 yen. Corporate tax estimated payments must be made within 2 months from 6 months after the start of the fiscal year.

The corporate tax estimated payment amount is basically half of the previous year's corporate tax amount. For example, if the previous year's corporate tax amount was 1 million yen, the estimated payment would be 500,000 yen.

For corporate tax estimated payments, you can choose between estimated return and interim settlement.

Estimated return:  Simple calculation based on previous year's results

Interim settlement:  Accurate calculation by actually conducting a 6-month settlement

Q1: What if I don't receive an estimated tax notice?

A1: Tax payment obligations exist even if you don't receive a notice. Check your previous year's final tax return, and if your income tax amount exceeds 150,000 yen, contact the tax office.

Q2: What about estimated tax when incorporating?

A2: When incorporating from sole proprietorship, corporate estimated tax payment is required when the previous year's corporate tax amount exceeds 200,000 yen. It's a separate system from individual estimated tax.

Q3: What's the difference from consumption tax interim returns?

A3: Estimated tax payment is an income tax system and separate from consumption tax interim returns. Consumption tax interim returns are required when the previous year's consumption tax amount exceeds 480,000 yen.

Q4: What if my reduction application is rejected?

A4: Even if rejected, the difference from the actual tax amount will be settled during final tax return. If overpaid, you can receive a refund.

Estimated tax payment is an important tax system that small and medium-sized automobile sales businesses cannot avoid. With proper understanding and preparation, you can reduce the burden on cash flow and lead to stable business operations.

Particularly in the automobile sales industry, there are industry-specific considerations such as taxation treatment of prorated automobile tax and compulsory insurance premiums, and tax processing of inventory vehicles. Understanding these correctly and creating a financial plan based on year-round tax schedules is the key to success.

If you have any questions, we recommend consulting with a tax accountant knowledgeable about the automobile sales industry. Through proper tax management, let's aim for further business development.