According to China's individual income tax law, individuals need to pay individual income tax when selling their own property. For the income generated by selling a dog worth 50 thousand yuan, it is necessary to calculate the amount of personal income tax.

First of all, according to the tax rate table stipulated in the individual income tax law, we can find the tax rate applicable to personal income.

Secondly, the income from selling dogs needs to be deducted from the exemption amount stipulated in the individual income tax law. According to the latest individual income tax law, China residents can enjoy the threshold of 5,000 yuan monthly income, that is, the part with personal income below this amount does not need to pay individual income tax.

Next, the threshold is deducted from the income from selling dogs, which is taxable income.

Then according to the applicable tax rate table, the taxable amount is calculated according to the taxable income.

Finally, the amount of personal income tax payable can be obtained by subtracting the tax paid from the tax payable.

It should be noted that, according to the individual income tax law, individuals should report the individual income tax of the previous year to the tax authorities from March/Kloc-0 to June 30 every year for tax payment.