Deduction

[mbilly]

I built a new house in 2021 for a specific contract amount.  We added extras that was above the allowance and had to pay the overage.  Is that amount deductible for home office "repairs" deduction?

[DawnC]

No, those are not deductible home office ''repairs''.     You can include the full amount you paid for the home as the cost basis for determining any depreciation for home office, rental, or other business use of your home expense.   

Cost basis is the original purchase cost of an asset (such as stocks, bonds, or property), plus any adjustments that result from transactions over the period you own the asset. Examples of adjustments would be an increase in valuation due to a property improvement or a decrease in valuation due to unreimbursed storm damage to the property.

Later, when you sell the asset (house), your cost basis gets subtracted from the money you collect from the sale.   Instead of paying tax on the full amount, you only get taxed on the profit (the selling price minus the cost basis).