Colorado Estate Tax Guide vs. Hiring a CPA: Which Option Is Right for Your Estate?

For most Colorado estates in 2026, you do not need a CPA for the tax filings. Colorado has no state estate tax, no inheritance tax, and the federal estate tax exemption sits at $15 million per individual. The actual tax work — filing the deceased's final DR 0104, applying for an estate EIN, and knowing whether a DR 0105 fiduciary return is required — is well within reach for a literate executor who has the right procedural guide. That said, there are specific situations where a CPA earns their fee many times over. This post lays out exactly where the line is.

What the Tax Work Actually Involves for a Colorado Estate

Before comparing options, it helps to understand what you're actually dealing with. "Colorado estate taxes" for most families means three distinct tasks:

The deceased's final individual income tax return (Form DR 0104 / IRS Form 1040). This covers income from January 1 through the date of death. You sign it as the "Personal Representative" and write "DECEASED" with the date of death at the top. If the deceased is owed a refund, you also file Form DR 0102 and attach a death certificate through Revenue Online.

The estate's fiduciary income tax return (Form DR 0105 / IRS Form 1041). This is the return most executors don't know exists. If the estate earns any Colorado-source income during the probate period — a single month of bank interest, a dividend, rental income from the family home — a separate fiduciary return is required. The estate is its own taxpayer with its own EIN.

Step-up in basis documentation. This isn't a filing, it's a protection. You need a qualified appraisal at the date of death for appreciated assets — real estate, brokerage accounts, business interests — so your beneficiaries pay zero capital gains when they sell. Done wrong, this costs families tens of thousands of dollars in preventable taxes.

Side-by-Side Comparison

Who This Is For (Guide-First Approach)

A structured guide like the Colorado Final Tax & Estate Tax Guide is the right primary tool if:

• The estate is modest — personal property under $88,000 (the 2026 small estate affidavit threshold) or a straightforward larger estate with a will and no disputes
• The deceased's income was relatively simple: wages, Social Security, a pension, a brokerage account
• The estate generated minimal income during probate — interest on a checking account, small dividends
• You're dealing with real estate in Colorado and need to understand the TD-1000 Transfer Declaration, recording fees, and property tax exemption transfer
• You want to understand the entire process before spending money on professionals, so you ask the right questions and don't burn billable hours on basics
• A CPA is not available or has declined to take on a small one-off estate filing

The guide also covers things no CPA or attorney will mention unprompted: the DR 2009 vehicle beneficiary form that supersedes the will, the August 15 grace period for the senior property tax exemption, and the Denver Probate Court's specific formatting requirements for pro se litigants.

Who This Is NOT For (Get Professional Help)

Stop and hire a CPA or estate attorney — or both — if:

• The estate is taxable at the federal level (above $15 million individual, $30 million married with portability election)
• The deceased was a business owner with partnership income, S-corp K-1s, or LLC interests generating complex pass-through income
• The estate contains community property imported from California, Texas, Arizona, or another community property state, and you haven't verified the UDCPRDA double step-up status is still intact (commingling destroys it permanently)
• There are contested creditor claims, disputed will provisions, or a surviving spouse electing against the will
• The estate spans multiple states with real property in non-Colorado jurisdictions
• The deceased had unfiled prior-year returns or outstanding IRS notices

In these cases, a guide helps you understand what's happening and prepare documentation — but it doesn't replace professional judgment on complex tax positions.

The Real Cost Comparison

A Colorado CPA handling an estate tax return typically charges $1,500 to $4,000 for a complete engagement covering both the final individual return and the fiduciary return, assuming a relatively straightforward estate. Denver-area rates for probate attorneys run $250 to $500 per hour. A single exploratory meeting before you understand the basics can easily cost $500 in billable time spent explaining what forms exist.

Many CPAs will not take on a small one-off estate filing during tax season. They have established clients with complex returns and no capacity for a $300 engagement on someone's simple final 1040. You may be turned away entirely.

For the overwhelming majority of Colorado estates — the family home, a brokerage account, a checking account, a car — the tax work is procedural and rule-based. The challenge is knowing which rules apply, in what order, and which deadlines are hard cutoffs versus which ones have grace periods.

The Combination That Works Best

Most executors end up in one of two places: they do everything themselves using a guide (effective for straightforward estates), or they use a guide first to understand the landscape and then bring a CPA in for the DR 0105 fiduciary return and K-1 strategy specifically. The guide costs a fraction of a single billable hour and eliminates the orientation work the CPA would otherwise bill for.

The Colorado Final Tax & Estate Tax Guide is built for exactly this: lay out the complete picture, let you handle what you can, and prepare you to work efficiently with professionals on the pieces that genuinely require them.

Frequently Asked Questions

Does a Colorado estate always need to file a DR 0105 fiduciary income tax return?

No. Form DR 0105 is only required if the estate generates Colorado-source income during the administration period — interest, dividends, rental income, or gains from selling assets. If the estate is closed quickly with no income generated, no fiduciary return is needed. The mistake most executors make is assuming they're in the clear without checking whether the estate accounts earned anything during the months of probate.

Can I file the deceased's final DR 0104 without a CPA?

Yes, in most cases. The final individual income tax return is filed the same way as a regular return, with two additions: you write "DECEASED" and the date of death at the top, and you sign as "Personal Representative" rather than the taxpayer. If a refund is owed, you also attach Form DR 0102 and submit the death certificate through Revenue Online. This is procedural work, not complex tax strategy.

When does it make financial sense to hire a CPA for Colorado estate taxes?

It makes clear sense when the estate has complex income sources (S-corp, partnership, rental real estate in multiple states), when a fiscal year election can meaningfully defer K-1 income to beneficiaries' advantage, or when the estate is large enough that the cost of a CPA is trivial relative to the tax savings at stake. For a simple estate with wage income and a brokerage account, the CPA cost often exceeds any tax benefit they can generate.

What happens if I file the DR 0105 wrong or late?

The Colorado Department of Revenue can assess penalties and interest on unpaid fiduciary tax. The standard penalty for late filing is 5% per month of unpaid tax, up to 25%. The DOR can also issue notices requiring the estate to respond, which delays the closing and may trigger correspondence with the IRS if the federal Form 1041 is also affected. For most simple estates, the risk is low because there's little or no tax owed — but the obligation to file still exists if income was generated.

Do CPAs handle the TD-1000 real property transfer declaration and property tax exemption transfer?

Almost never. These are filings with the county assessor's office, not with the Department of Revenue. CPAs handle income and estate tax returns. The TD-1000 must accompany every recorded deed to prevent artificially inflated property tax assessments — missing it results in a $25 penalty or 0.025% of the sale price. The senior property tax exemption Long Form must be filed by July 15. Both of these are executor responsibilities that fall outside typical CPA scope, which is one reason a comprehensive guide covers them when a CPA engagement doesn't.

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