Financial transactions between relatives can seem straightforward, but tax rules still apply when money or property changes hands within a family. Common family tax mistakes involving rental property, loans, gifts, and home transfers can create unexpected income tax, gift tax, and capital gains consequences.
Understanding the rules before completing a transaction can help families avoid costly surprises. The following situations are among the most important to consider.
What Are Common Family Tax Mistakes?
Some of the most common mistakes involve treating an informal family arrangement differently from a similar transaction between unrelated parties. The IRS may still apply rules involving fair market value, interest rates, gifts, property basis, and related-party transactions.
| Family Transaction | Main Tax Issue | Potential Consequence | What to Confirm |
|---|---|---|---|
| Renting to a relative | Fair market rent | Deduction and depreciation limits | Whether rent reflects market value |
| Making a family loan | AFR and interest | Imputed interest and possible gift treatment | Current AFR and written loan terms |
| Forgiving a family loan | Gift treatment | Gift tax reporting may apply | Amount forgiven and annual exclusion |
| Gifting cash or assets | Gift tax rules | Reporting may be required | Current annual exclusion and lifetime exemption |
| Gifting a home | Carryover basis | Larger future taxable gain | Donor’s adjusted basis |
| Inheriting a home | Basis adjustment | Potentially lower taxable gain | Date-of-death value |
| Adding a child to a title | Partial gift | Basis and future gain issues | Ownership percentage and retained rights |
| Selling property to a relative | Related-party rules | Losses may be limited or disallowed | Relationship and sale terms |
| Hiring family members | Employment tax rules | Payroll tax treatment may differ | Relationship, entity type, and wages |
Renting a Home to a Relative
Renting property to a family member can have different tax consequences depending on whether the relative pays fair rental value. The IRS provides detailed guidance for residential rentals in Publication 527, Residential Rental Property.
When a relative uses the property as a principal residence and pays fair rental value, the property can generally be treated as a rental. Rental income and qualifying expenses are reported under the normal rental property rules, with losses subject to applicable limitations.
When rent is substantially below fair rental value, however, the owner’s use may be treated as personal rather than rental use. This can restrict deductions and prevent the owner from deducting a rental loss.
Charging reduced rent can also have gift tax implications in some circumstances. The difference between fair rental value and the amount actually charged should therefore be considered along with any other gifts made to that family member during the year.
Making a Below-Market Loan to a Family Member
Informal loans between relatives are common, but lending money without charging adequate interest can create tax consequences for both parties.
The IRS uses Applicable Federal Rates (AFRs) to establish minimum interest rates for certain transactions. These rates change monthly, so families should check the current Applicable Federal Rates rather than relying on an old percentage.
With a below-market family loan, the lender may be treated as having received interest even when that interest was never actually paid. The forgone interest may also be treated as a gift to the borrower.
An important exception generally applies when the total outstanding loans between the borrower and lender are $10,000 or less, provided the requirements for the exception are met. For qualifying gift loans of $100,000 or less, the amount of forgone interest is generally limited to the borrower’s net investment income. If that income is $1,000 or less, it is treated as zero for this purpose.
A family loan should be documented like a genuine financial transaction, including the principal amount, interest rate, repayment schedule, and other relevant terms. Families considering significant loans can also incorporate them into broader tax planning before money changes hands.
Forgiving a Family Loan
A loan that begins as a legitimate debt can create a separate tax issue if some or all of the balance is later forgiven. Depending on the circumstances, the amount forgiven may be treated as a gift from the lender to the borrower.
Whether a gift tax return is required depends on the amount involved, other gifts made during the year, and applicable exclusions.
This is one reason families should maintain records of both the original loan and any later changes to its terms.
Gifting Cash or Other Assets to Family Members
Giving money or property to a relative does not automatically mean gift tax will be owed. For 2026, the annual gift tax exclusion is $19,000 per recipient. Gifts exceeding the annual exclusion may require a gift tax return, although that does not necessarily mean gift tax will be due.
The 2026 federal estate and gift tax basic exclusion amount is $15 million per individual. Larger lifetime gifts can use part of this exclusion, making documentation and long-term planning important.
The IRS provides additional information through its gift tax guidance. For families managing multiple assets, investments, businesses, or multigenerational wealth, family office services can also help coordinate tax and financial considerations across related transactions.
Families making substantial gifts should also consider how those transfers fit into their broader estate strategy, particularly as estate tax exemptions can affect long-term planning decisions.
Gifting a Home Versus Leaving It as an Inheritance
One of the most significant common family tax mistakes is transferring a home without considering how the transfer will affect the recipient’s tax basis.
When property is given as a gift, the recipient generally takes the donor’s adjusted basis for purposes of determining gain. If a parent purchased a home many years ago for substantially less than its current value, that low basis can result in a significant taxable gain when the child eventually sells the property.
Inherited property is generally treated differently. Its basis is generally determined using the property’s fair market value at the owner’s date of death, subject to applicable rules. When that value is higher than the former owner’s basis, the adjustment is commonly referred to as a step-up in basis.
For example, assume a parent has an adjusted basis of $100,000 in a home currently worth $400,000. If the home is gifted to a child and later sold for $400,000, the child’s starting basis generally reflects the parent’s $100,000 basis, potentially creating a substantial gain. If the child instead inherits the property when its date-of-death value is $400,000 and then sells it for that amount, there may be little or no gain, depending on the circumstances.
Because basis can dramatically affect the eventual tax cost of a sale, transferring title during the owner’s lifetime should not be treated as a simple administrative decision.
Adding a Child to a Home’s Title
Adding a child or another relative to a property title can have tax consequences. Depending on how ownership is transferred, adding another person may constitute a gift of part of the property.
The recipient’s basis in the transferred portion, the owner’s retained interest, and the eventual sale of the property can all affect the tax result. If the child later uses the property as a principal residence, the home-sale exclusion may also become relevant.
A qualifying taxpayer can generally exclude up to $250,000 of gain from the sale of a main home, or up to $500,000 for qualifying married couples filing jointly. The taxpayer generally must have owned and used the property as a main home for at least two of the five years preceding the sale.
The IRS explains these requirements and other basis considerations in Publication 523, Selling Your Home. Families should also be careful when an older homeowner transfers title but continues living in the property, because retained rights and the structure of the transfer can affect its estate and tax treatment.
Selling Property to a Relative
Selling property to a family member does not necessarily receive the same tax treatment as a transaction between unrelated parties. Federal related-party rules can restrict the recognition of certain losses and affect later transactions involving the property.
The sale price also matters. Selling property for substantially less than fair market value may result in a transaction that is treated partly as a sale and partly as a gift.
Before completing a family property sale, both the property’s fair market value and the tax basis should be established and documented.
Hiring Family Members
Employing a spouse, child, or other relative can be a legitimate business arrangement, but family employment has its own tax considerations. Wages should reflect actual work performed and be properly documented, and payroll tax treatment can vary depending on the relationship between the employee and employer and the business’s legal structure.
Business owners considering employing their children can find additional information in Tax Breaks for Hiring Your Children in Your Family Business.
Why Planning Before a Family Transaction Matters
Family arrangements are often informal because the people involved trust one another. Tax law, however, does not necessarily treat a transaction differently simply because it occurs between relatives.
Documentation, fair market values, current tax thresholds, property basis, and the structure of the transaction can all affect the outcome. Reviewing these issues before transferring money or property provides more options than attempting to correct an unfavorable tax result afterward.
MeredithCPAs can help evaluate the tax implications of family loans, gifts, property transfers, and other financial arrangements before a transaction is completed. Contact MeredithCPAs to discuss how a proposed family transaction could affect your tax situation.
Considering a financial transaction with a family member? Contact MeredithCPAs to discuss the potential tax implications before you move forward.
FAQs
What are the most common family tax mistakes?
Common mistakes include renting property to relatives below market value, making undocumented or below-market family loans, and transferring property without considering gift tax and basis consequences.
Can you rent a house to a family member below market value?
Yes, but charging less than fair rental value can change the property’s tax treatment and limit deductions that would otherwise apply to rental property.
Do family loans have to charge interest?
Family loans may be subject to IRS below-market loan rules. Using an interest rate below the applicable federal rate can create imputed interest and potential gift tax consequences.
Is giving a house to a child taxable?
Transferring a home to a child may constitute a gift and can create gift tax reporting and basis considerations, even when no immediate gift tax is owed.
Is it better to gift or inherit a house for tax purposes?
Inherited property generally receives a basis based on its value at the owner’s death, while gifted property generally carries over the donor’s basis. This can significantly affect capital gains when the property is later sold.
Does adding a child to a house title count as a gift?
It can. Adding a child as an owner may constitute a gift of part of the property’s value and can affect both gift tax reporting and the child’s basis.