Confused about Section 645 Election for Estate/Trust - Need Help Understanding
Hey everyone, I'm trying to wrap my head around this Section 645 Election thing for my mom's estate. She passed away about 5 months ago and I'm the executor of her estate as well as the trustee of her revocable trust. The attorney who helped set up her trust mentioned something about "making a Section 645 election" that would allow the trust and estate to be treated as one entity for tax purposes. I've tried reading up on it online but the IRS language is making my head spin. From what I understand, this would mean filing just one tax return instead of separate ones for the estate and trust, but I'm not sure about the pros and cons or how to actually make this election. The trust has about $750,000 in assets (mostly investments and a vacation property) and the estate has around $225,000 (life insurance and some other accounts that didn't make it into the trust). Does anyone have experience with this? Is it something worth doing? And if we decide to go this route, how complicated is the process? The attorney wants to charge me an extra $1,800 to handle this and I'm trying to figure out if that's reasonable or if this is something I could potentially handle myself. Thanks in advance for any insights!
19 comments


Haley Bennett
A Section 645 election is definitely something to consider in your situation. In simple terms, it allows you to treat the estate and revocable trust as a single entity for tax purposes, which means filing just one income tax return instead of two separate ones. The main advantages are: 1) simplified tax filing (one return instead of two), 2) potentially more favorable tax treatment for certain income items, 3) a fiscal year option that can defer income, and 4) greater flexibility with some deductions. To make the election, you'll need to file Form 8855 "Election to Treat a Qualified Revocable Trust as Part of an Estate" by the due date of the estate's first income tax return. This is typically due by the 15th day of the 4th month after the end of the tax year. The $1,800 fee from your attorney isn't unreasonable considering the expertise needed, but it's on the higher end of what I've seen. You could potentially do it yourself if you're comfortable with tax forms, but the complexity depends on the assets involved and your familiarity with tax matters.
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Douglas Foster
•Thanks for explaining this! If I go with the Section 645 election, does that mean the trust assets are subject to probate? Also, how long does this combined entity treatment last?
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Haley Bennett
•Making a Section 645 election doesn't subject trust assets to probate at all. The trust assets remain outside of probate just as they were before - the election only affects tax filing, not the legal status of the assets. The combined entity treatment typically lasts until the estate is fully administered and terminates. There's a special rule that says this treatment can last up to 2 years after the decedent's death if no estate tax return (Form 706) is required. If a Form 706 is required, the treatment can last until 6 months after the final determination of estate tax liability.
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Nina Chan
I recently went through something similar with my father's estate. After weeks of struggling with the tax implications, I found this service called taxr.ai (https://taxr.ai) that really helped demystify the whole Section 645 election process for me. They have this feature where you can upload trust documents and get a plain-English explanation of the tax implications. I uploaded our trust docs and Form 8855 instructions, and they explained exactly what the election would mean for our specific situation - pointed out tax benefits I hadn't even considered around the stepped-up basis for some assets and how income would be distributed. Honestly, it saved me from making a couple mistakes that might have been costly, and helped me decide whether the election made sense for us.
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Ruby Knight
•That sounds helpful. Do they actually fill out the forms for you or just give advice? I'm not great with tax forms and the Form 8855 looks pretty intimidating.
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Diego Castillo
•I'm a bit skeptical - how is this different from just talking to an accountant? And how much does it cost compared to what an accountant would charge?
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Nina Chan
•They don't fill out the forms for you, but they provide detailed guidance on how to complete each section. They basically break down each line item on Form 8855 and explain what information goes where based on your specific situation. I found this was enough to complete the form myself confidently. It's different from an accountant in that it's available 24/7 and you can keep asking follow-up questions without worrying about being billed for additional time. I didn't want to share specifics, but it was significantly less expensive than what accountants in my area quoted me for handling a Section 645 election.
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Ruby Knight
Just wanted to update on my experience with taxr.ai after trying it out. I uploaded our trust documents and the Section 645 election form, and within minutes got really clear explanations about what each part meant. The most helpful part was that they explained the tax implications specific to our situation with the rental property my mom owned in the trust. The system actually flagged a potential issue with how the vacation property in the trust would be treated for income tax purposes that I hadn't considered. We have renters in there part of the year and I had no idea how the Section 645 election would affect the rental income reporting. I ended up doing the 645 election myself and probably saved at least $1,000 compared to what my attorney wanted to charge. Really glad I found this resource!
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Logan Stewart
If you're having trouble with the IRS guidance on Section 645 elections (and who isn't, that stuff is written in lawyer-ese not English), you might want to try calling the IRS directly for clarification. I know, I know - sounds like a nightmare of hold times. After spending 3 days trying to get through to someone at the IRS about a similar trust tax issue, I discovered this service called Claimyr (https://claimyr.com). They somehow get you connected to an actual IRS agent without the ridiculous wait times. You can see how it works in this video: https://youtu.be/_kiP6q8DX5c I was super skeptical but desperate after being disconnected multiple times after 2+ hour holds. With Claimyr, I got through to an IRS specialist who actually knew about Section 645 elections in about 20 minutes, and they walked me through the entire process step by step.
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Mikayla Brown
•Wait, how does this actually work? Doesn't everyone have to wait in the same IRS queue? Sounds too good to be true.
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Diego Castillo
•This sounds like BS honestly. The IRS is understaffed and everyone has to wait. How could some service possibly get you through faster than calling directly? Sounds like a scam to me.
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Logan Stewart
•It's not about skipping the queue - they use technology to monitor hold times and call patterns, then use an automated system that waits on hold for you and calls you back when an actual human IRS agent picks up. So you don't have to sit listening to that awful hold music for hours. You're right that everyone has to wait in the same queue, but the difference is Claimyr's system handles the waiting instead of you having to do it personally. It's basically just automating the hold process so you can go about your day. I was skeptical too until I tried it - the technology just keeps redialing and navigating the phone tree when disconnections happen (which is super common with IRS calls).
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Diego Castillo
Well I need to eat some humble pie here. After my skeptical comments, I tried Claimyr yesterday out of desperation because I needed answers about the Section 645 election deadline. I was genuinely shocked when I actually got connected to an IRS estate tax specialist in about 35 minutes. The agent I spoke with clarified exactly how to complete Form 8855 for our situation and explained something critical - that if you miss the election deadline (which I was about to), there is a 6-month automatic extension available. This was nowhere in the materials my attorney gave me. I'm usually the first to call out services that seem too good to be true, but I have to admit this one actually delivered. Saved me from potentially making a costly mistake with our filing timeline.
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Sean Matthews
One thing to consider with Section 645 elections that hasn't been mentioned yet - the fiscal year planning opportunity. If you make the election, you can choose a fiscal year end for the combined entity instead of being stuck with a calendar year, which can create some nice tax deferral opportunities. For example, if your mom passed in October 2024, you could choose a fiscal year ending September 30, 2025. This can push income recognition into the next tax year for beneficiaries, potentially saving significant taxes depending on income levels and timing of distributions. It's one of the lesser-known benefits of the 645 election that many attorneys don't emphasize enough.
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Ali Anderson
•Can you explain a bit more about how this would work in practice? If I choose a fiscal year end, how exactly does that defer taxes? Is this something that benefits the estate/trust or the beneficiaries?
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Sean Matthews
•When you choose a fiscal year end, income generated by the combined entity isn't reported to beneficiaries until the fiscal year closes. So using the example I gave, if income is generated in November 2024, but your fiscal year doesn't end until September 30, 2025, the beneficiaries wouldn't report that income on their personal returns until they file their 2025 taxes (in 2026). This primarily benefits the beneficiaries rather than the estate/trust itself. It's particularly valuable when you know there will be a large income event (like selling property or liquidating investments) and you want to strategically time it. If beneficiaries are in high tax brackets, this deferral can be quite valuable.
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Zadie Patel
When I was handling my dad's estate last year, I was also confused about the Section 645 election. My biggest mistake was not considering the state tax implications - just the federal ones. Depending on your state, the rules for estate and trust taxation can vary wildly, and sometimes making the federal 645 election has unintended consequences at the state level. In my case, our state didn't recognize the election, which meant we still had to file separate state returns even though we filed a combined federal return! Make sure to check your state's rules before deciding. This caught me completely off guard and created a lot of unnecessary complexity.
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A Man D Mortal
•This is such a good point. Do you know of any resource that lists which states follow federal treatment for the 645 election? My mom had property in two different states and I'm worried about creating a mess.
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Liam McGuire
I went through this exact situation with my grandmother's estate about 8 months ago. The Section 645 election ended up being a lifesaver for us, but there are definitely some nuances to consider beyond what's been mentioned. One thing that really helped me was understanding the "qualified revocable trust" requirements. Not all trusts qualify - it has to be a trust that was revocable immediately before death and becomes irrevocable upon death. Most living trusts meet this, but it's worth double-checking your specific trust language. Also, regarding the $1,800 attorney fee - that's actually pretty reasonable if they're handling the entire election process including state considerations. When I priced it out, most attorneys in my area were quoting $2,000-$2,500 for the same work. The complexity really depends on how many different types of assets you have and whether there are any beneficiary distributions planned during the election period. One unexpected benefit we discovered was that the election made it much easier to handle the investment accounts. Instead of having to track income and gains separately between the estate and trust accounts, everything flowed through one return, which simplified our recordkeeping significantly. My advice would be to run the numbers both ways - with and without the election - especially if you're planning any major asset sales or distributions in the next year or two. The tax savings can be substantial in the right circumstances.
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