When someone dies with a taxable estate in Arizona, the executor or personal representative must file IRS Form 706 (United States Estate Tax Return) within nine months of the date of death. One of the most critical — and most commonly mishandled — requirements on Form 706 is the real estate valuation.

The IRS doesn't accept Zillow estimates, county tax assessments, or the executor's best guess. They require a professional appraisal from a qualified appraiser, prepared according to Uniform Standards of Professional Appraisal Practice (USPAP).

Get the appraisal wrong, and you risk IRS audits, penalties, and disputes with beneficiaries. Get it right, and you protect the estate, minimize tax liability, and provide clear documentation for probate court and beneficiary distributions.

Here's what Arizona executors, estate planning attorneys, and CPAs need to know about estate tax return appraisals — and how desktop appraisals can deliver IRS-compliant valuations faster and cheaper than traditional appraisals.

When IRS Form 706 is Required

Not every estate needs to file Form 706. The requirement kicks in when the gross estate exceeds the federal estate tax exemption threshold.

2026 Federal Estate Tax Exemption: $13.61 million (indexed for inflation)

If the decedent's gross estate — including real estate, bank accounts, investments, life insurance, business interests, and personal property — exceeds $13.61 million, the executor must file Form 706.

Key points:

Gross estate includes everything the decedent owned: Real estate, cash, stocks, bonds, retirement accounts, life insurance death benefits (if the decedent owned the policy), business interests, vehicles, jewelry, art, collectibles.

Marital deduction: Assets passing to a surviving spouse are deductible from the gross estate (unlimited marital deduction). The estate tax typically applies only when the second spouse dies or assets pass to non-spouse beneficiaries.

Portability election: If the decedent was married and the surviving spouse wants to claim the unused portion of the decedent's estate tax exemption, Form 706 must be filed even if no estate tax is owed. This preserves the exemption for the surviving spouse's future estate.

State estate tax: Arizona has no state estate tax. Only the federal Form 706 is required.

Appraisal Requirements for Form 706

IRS Form 706 requires fair market value for all real estate owned by the decedent as of the date of death (or the optional alternate valuation date six months later).

Fair market value is defined by the IRS as:

"The price at which the property would change hands between a willing buyer and a willing seller, neither being under any compulsion to buy or to sell and both having reasonable knowledge of relevant facts."

The IRS requires appraisals to be prepared by a qualified appraiser according to USPAP standards. The appraisal report must include:

Property description (address, legal description, lot size, square footage, bed/bath count, improvements)
Date of valuation (date of death or alternate valuation date)
Valuation method (sales comparison approach, cost approach, income approach)
Comparable sales (recent sales of similar properties in the area)
Adjustments (differences between subject property and comparables)
Final opinion of value (supported by market data)
Appraiser qualifications (license number, certifications, signature)

Desktop appraisals meet all IRS requirements for residential real estate when the property is:

Single-family home, condo, or townhouse
Standard construction with no unusual features
Located in an area with recent comparable sales
Accessible via public records and MLS data

For commercial properties, large estates, or properties with unique features, a full appraisal with interior inspection may be required.

Date-of-Death Valuation vs. Alternate Valuation Date

Executors have two options for valuing estate assets on Form 706:

Option 1: Date-of-Death Valuation (Default)

All assets are valued as of the date of death. This is the standard approach and the one the IRS expects unless the executor makes a specific election for the alternate valuation date.

Option 2: Alternate Valuation Date (6 Months Later)

If the estate's value has decreased between the date of death and six months later, the executor can elect to value all assets as of the alternate valuation date.

Why use the alternate valuation date?

To reduce estate tax liability. If the real estate market drops or investments decline in value, using the alternate valuation date results in a lower gross estate and lower estate tax.

Important rules:

All-or-nothing election: You can't cherry-pick. If you elect the alternate valuation date, all assets must be valued as of that date (not just the ones that decreased in value).

Reduces estate tax: The alternate valuation date can only be used if it results in both (a) a lower gross estate value, and (b) lower estate tax liability.

Irrevocable: Once Form 706 is filed with the alternate valuation date election, you can't change it.

Example:

Date of death (Jan 1, 2026): Real estate valued at $1,200,000
Alternate valuation date (July 1, 2026): Real estate valued at $1,050,000 (market softened)
Tax savings: Lower gross estate = lower estate tax (if estate is taxable)

If you're considering the alternate valuation date, consult your CPA or estate tax attorney. The IRS scrutinizes these elections closely.

9-Month Filing Deadline and Appraisal Timing

IRS Form 706 must be filed within nine months of the date of death. Extensions are available, but the filing deadline is strict.

Appraisal timing recommendations:

Order the appraisal within 30-60 days of death

Don't wait until month eight to order the appraisal. Property values can change, and you need time to prepare the full Form 706.

Use the appraisal for probate court filings

Many Arizona probate courts require property valuations for inventory filings. The same appraisal can be used for both Form 706 and probate court.

If using the alternate valuation date, order two appraisals

One as of the date of death, and one as of the alternate valuation date (six months later). This documents the decline in value and supports the alternate valuation election.

Keep the appraisal in the estate file permanently

The IRS has three years from the filing date to audit Form 706 (longer if fraud or substantial understatement is suspected). Keep the appraisal report, appraiser qualifications, and all supporting documentation.

Common IRS Audit Triggers for Estate Appraisals

The IRS audits about 8-10% of estate tax returns, with higher audit rates for estates over $10 million. Here are the most common appraisal-related triggers:

1. Overvaluation

Executors sometimes inflate property values to increase the step-up in basis for beneficiaries (reducing future capital gains tax). The IRS compares appraised values to recent sales and may challenge inflated values.

2. Undervaluation

More common than overvaluation. Executors undervalue properties to reduce estate tax liability. The IRS uses its own appraisers to verify values and will assess penalties for substantial understatement (more than 65% of actual value).

3. Missing Appraisal

Some executors skip the appraisal and use county tax assessments or their own estimates. The IRS requires a qualified appraisal — no exceptions.

4. Unlicensed Appraiser

Using a friend, relative, or unlicensed appraiser to save money is a red flag. The IRS requires appraisers to be licensed by the state and qualified under USPAP.

5. Outdated Appraisal

If the appraisal is dated more than six months before or after the date of death, the IRS will question its relevance. Always use the correct valuation date.

6. Inconsistent Values

If the executor lists the property at one value on Form 706 and a different value on the probate court inventory, the IRS will ask why. Be consistent across all filings.

Step-Up in Basis and Capital Gains Tax Planning

One of the key tax benefits of estate planning is the step-up in basis for inherited property.

How it works:

Original basis: What the decedent paid for the property (e.g., $200,000 in 1990)
Date-of-death value: Fair market value as of death (e.g., $800,000 in 2026)
Step-up in basis: The beneficiary's new cost basis is $800,000 (the date-of-death value)
Capital gains tax savings: If the beneficiary sells the property for $800,000, they owe zero capital gains tax (no gain because the stepped-up basis = sale price)

The appraisal establishes the stepped-up basis. If the appraisal is too low, beneficiaries pay more capital gains tax when they sell. If the appraisal is too high, the estate pays more estate tax (if taxable).

Strategy: Work with your CPA to balance estate tax minimization (lower appraisal) with capital gains tax minimization (higher appraisal). For most estates under the $13.61 million exemption, maximizing the step-up in basis (higher appraisal) is the better strategy.

Desktop Appraisal for Residential Estate Property

Desktop appraisals are IRS-compliant valuations that meet all USPAP requirements without requiring a physical interior inspection. They're appropriate for:

Single-family homes, condos, townhouses
Properties in good condition with recent comparable sales nearby
Estates where interior access is difficult (property is occupied by beneficiaries, tenant, or difficult to access)
Executors who need fast, cost-effective valuations

Desktop appraisals cost significantly less than full appraisals ($175 vs. $400-600+) and deliver results in 24 hours instead of 7-10 days. For estates with multiple properties, the cost savings add up quickly.

What the IRS accepts:

The IRS does not require interior inspections for residential properties if the appraiser can reliably estimate value using public records, MLS data, and comparable sales. Desktop appraisals meet this standard.

When you need a full appraisal:

High-value estates (over $5 million property value)
Properties with unique features (custom homes, large estates, luxury properties)
Properties in areas with few recent comparable sales
Commercial real estate, farms, or vacant land

Consult your estate attorney or CPA to determine whether a desktop appraisal is appropriate for your situation.

How to Avoid Appraisal-Related Disputes with Beneficiaries

Estate appraisals aren't just for the IRS — they also protect executors from beneficiary disputes.

Common disputes:

Beneficiaries claim the executor undervalued the property to favor one beneficiary over another (e.g., one beneficiary buys out others at a low price)
Beneficiaries claim the executor overvalued the property to inflate the estate's value and justify higher executor fees
Beneficiaries disagree on whether to sell or keep the property — a neutral appraisal establishes market value and informs the decision

How to avoid disputes:

Order the appraisal early (before beneficiaries start asking questions)
Share the appraisal with all beneficiaries (transparency builds trust)
Use an independent, licensed appraiser (not a family friend or beneficiary's appraiser)
Document the appraisal in probate court filings (creates a permanent record)
Consult your estate attorney before making distribution decisions based on the appraisal

Why Choose Next Day Desktops for Your Estate Tax Return Appraisal?

IRS-Compliant Reports

Every appraisal meets USPAP standards and IRS Form 706 requirements. Certified Residential Appraiser licensed in Arizona. Audit-defensible documentation.

24-Hour Turnaround

Don't wait weeks for an appraisal. We deliver desktop appraisals in 24 hours, often same-day. Meet your nine-month filing deadline with time to spare.

Flat-Rate Pricing

$175 for desktop appraisals. No hidden fees, no surprises. For estates with multiple properties, we offer volume discounts.

Experienced with Probate and Estate Tax Appraisals

We've appraised hundreds of Arizona estate properties. We understand IRS requirements, probate court procedures, and the sensitivity of estate valuations.

Date-of-Death Valuation Accuracy

We use market data from the date of death (not today) to ensure IRS compliance. If you're considering the alternate valuation date, we can provide both appraisals.

How to Order an Estate Tax Return Appraisal

Step 1: Gather Property Information

You'll need:

Full property address
Legal description (from deed or title report)
Tax parcel number (APN)
Date of death (this is your valuation date)
Copy of most recent deed (if available)

Step 2: Determine Valuation Date

Date of death: Standard approach
Alternate valuation date (6 months later): Only if estate value has decreased and you're electing alternate valuation on Form 706

Step 3: Confirm Desktop vs. Full Appraisal

Most Arizona residential properties qualify for desktop appraisals. If the property is high-value, unique, or complex, we'll recommend a full appraisal with interior inspection.

Step 4: Order Online

Visit nextdaydesktops.com/order and complete the order form. Include:

Property address
Date of death (valuation date)
Intended use: "IRS Form 706 Estate Tax Return"
Client contact (executor, attorney, or CPA)

Step 5: Receive Your Appraisal in 24 Hours

We'll deliver a full USPAP-compliant appraisal report via email. Attach to Form 706, file with probate court, and distribute to beneficiaries with confidence.

Frequently Asked Questions

Q: Can I use the same appraisal for probate court and Form 706?

A: Yes. Arizona probate courts and the IRS both accept USPAP-compliant appraisals. One appraisal satisfies both requirements.

Q: What if the property was sold before I filed Form 706?

A: The IRS still requires an appraisal as of the date of death. The sale price is not the appraised value — it reflects a different valuation date.

Q: Do I need an appraisal if the estate is below the $13.61 million exemption?

A: Not for IRS purposes. But Arizona probate courts often require property valuations for inventory filings, and beneficiaries may request an appraisal for distribution purposes.

Q: Can I use the county tax assessment instead of an appraisal?

A: No. The IRS does not accept tax assessments. They're typically 10-30% below fair market value and aren't prepared by qualified appraisers.

Q: What if I disagree with the appraisal value?

A: You can order a second appraisal from a different appraiser. If the two values are close, average them. If they're far apart, consult your attorney about resolving the discrepancy.

Q: How long is the appraisal valid?

A: The appraisal is valid as of the valuation date (date of death or alternate valuation date). It doesn't expire, but if the IRS audits the estate years later, they may order a new appraisal to verify the original value.

Order Your Estate Tax Return Appraisal Today

Executors have enough to worry about without adding IRS appraisal disputes to the list. A professional, USPAP-compliant appraisal protects the estate, satisfies IRS requirements, and provides clear documentation for beneficiaries.

Ready to move forward?

Order a desktop appraisal at nextdaydesktops.com/order. 24-hour delivery. $175 flat rate. IRS-compliant reports.

Questions? Email mark@nextdaydesktops.com or call for a free consultation.

Keywords: estate tax return appraisal Arizona, IRS Form 706 appraisal, estate tax valuation, executor appraisal requirements, date-of-death appraisal, probate appraisal Arizona, USPAP estate appraisal, step-up in basis appraisal

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Estate Tax Return Appraisal: Arizona Executors' Guide to IRS Form 706 Requirements