Partnership Tax Preparation (Form 1065)

Posted Monday, July 6, 2026

Partnership Tax Preparation – Form 1065 and Schedule K-1 preparation for multi-member LLCs, general partnerships, LLPs, and real estate partnerships

Partnership taxation is arguably the most complex area of the entire tax code. That is not opinion – that is the consensus of pretty much every tax professional who has ever cracked open Subchapter K. If you have a multi-member LLC, a general partnership, an LLP, or a real estate venture with more than one owner, you are living in this world whether you like it or not.

And look, we get it. You started a business or invested in a property with a partner because it made financial sense. Nobody was thinking about substantial economic effect rules or Section 704(b) capital accounts at the closing table. You were thinking about returns, strategy, and maybe splitting the workload. But now it is tax time, and suddenly you are staring at a Form 1065, Schedule K-1s, and a bunch of terms that sound like they were invented to keep accountants employed. Huh?

Here is the good news. We handle this. A lot. Partnership returns are one of the areas where WCG earns its keep, because getting these wrong creates cascading problems – for every single partner, across every state where they file, sometimes for years.

What a Partnership Return Actually Involves

A partnership does not pay federal income tax. Period. Full stop. Instead, the partnership files Form 1065 as an informational return, and all the income, deductions, credits, gains, and losses flow through to the individual partners via Schedule K-1.

Sounds simple enough. It is not.

Every partner gets a K-1 that reports their share of the partnership’s activity. That K-1 then feeds into each partner’s personal Form 1040 (or their trust return, or their corporate return, depending on the partner type). The K-1 has to be right, or the partner’s personal return is wrong. And when we say “right,” we mean every line, every code, every supplemental statement.

Here we go - the core components of a partnership return:

  • Form 1065 itself – the informational return reporting the partnership’s total income, deductions, gains, losses, and credits for the year
  • Schedule K-1 (Form 1065) – one for each partner, reporting their individual allocable share
  • Capital account reporting – since 2020, the IRS requires tax basis capital account reporting on Schedule K-1. Gone are the days of GAAP or Section 704(b) capital accounts on the K-1
  • Partner basis tracking – each partner’s outside basis determines whether they can deduct losses, take distributions tax-free, and more
  • Guaranteed payments – payments to partners for services or capital use, reported differently than distributive share income
  • Allocation of income, loss, and credits – partnerships can have special allocations that differ from ownership percentages, but these must meet substantial economic effect rules under Section 704(b)
  • Debt allocations – partnership liabilities (recourse, nonrecourse, qualified nonrecourse) affect each partner’s basis
  • State filing requirements – many states require the partnership to file and some impose entity-level taxes or composite requirements for nonresident partners

That is a lot of moving parts for a return that does not even owe tax. We get the irony.

Types of Partnerships We Handle

Not all partnerships are created equal. We handle the full range-

Multi-Member LLCs Taxed as Partnerships. The most common structure we see. Two or more members form an LLC, and by default, the IRS treats it as a partnership. No election needed. Sidebar: married couples in community property states can sometimes elect out of partnership treatment under the Qualified Joint Venture rules. Worth exploring if it applies to you.

General Partnerships and LLPs. Traditional ventures with two or more people, often seen with professional service firms – law firms, medical practices, accounting firms. LLPs give partners some liability protection while maintaining the partnership tax structure.

Real Estate Partnerships. Whether it is two people who bought a rental duplex, a group of investors in a syndication, or a developer flipping properties, real estate partnerships come with their own layer of complexity. Passive activity rules, at-risk limitations, cost segregation allocations, Section 1250 recapture – all flowing through K-1s. We see a lot of these.

Investment and Family Partnerships. Investment partnerships pool capital and trigger different reporting depending on whether the partnership is a trader versus investor. Family partnerships require extra attention under IRC Section 704(e) to ensure the IRS recognizes the allocation of income as legitimate.

Why Partnership Returns Are Uniquely Complex

We said it at the top. Subchapter K is the most complex part of the Internal Revenue Code. Some tax professors spend entire careers on nothing else. Here is why.

  • Special Allocations. Unlike S corporations, partnerships can allocate income, gains, losses, and credits in any proportion the partners agree to. But those special allocations must have “substantial economic effect” under Section 704(b). The regulations include a primary economic effect test, an alternate economic effect test, and an economic effect equivalence test. If your eyes just glazed over, you are not alone. But skip these rules and the IRS can reallocate everything based on their determination of each partner’s interest. That is not a phone call you want to get.
  • Guaranteed Payments vs. Distributive Share. A partner who works in the business might receive guaranteed payments (think of it like a salary, but not exactly) or might receive a larger share of profits. Guaranteed payments are ordinary income to the partner and deductible by the partnership. Distributive share retains the character of the underlying income. Getting this wrong changes the math for everyone.
  • Inside Basis vs. Outside Basis. The partnership has basis in its assets (inside basis). Each partner has basis in their partnership interest (outside basis). These can diverge significantly after sales, property contributions, or distributions. When they diverge, Section 754 elections come into play. Basically, a 754 election allows the partnership to adjust inside basis when a partner sells their interest or dies. Without it, the new partner might pay tax on gains that the previous partner already accounted for. It is elegant when used correctly and a nightmare to track when nobody told the accountant about it.
  • Hot Assets and Section 751. When a partner sells their partnership interest, you would think they just have a capital gain. Not necessarily. If the partnership holds “hot assets” – unrealized receivables or substantially appreciated inventory – a portion of the gain gets recharacterized as ordinary income. This catches people off guard every single time.

Common Mistakes We See

Partnership returns that come to us from other preparers tend to have a familiar set of problems. Here we go-

  • Late K-1s. The single biggest complaint from partners. The partnership return is due March 15, and every partner needs their K-1 to file their personal return. When K-1s are late, every partner’s return is late. We have seen situations where one late K-1 from a single investment partnership forces a dozen partners to extend. Yuck.
  • Incorrect Capital Account Reporting. Since 2020, the IRS requires tax basis capital accounts on Schedule K-1. Many preparers were reporting on a GAAP basis, a 704(b) basis, or some hybrid that was not really any method at all. We still see returns where capital accounts do not reconcile to the balance sheet or use the wrong method entirely. The IRS uses this information to cross-check partner basis, so getting it wrong is an invitation for a notice.
  • Forgetting State Filing Requirements. If a partnership has partners in multiple states, each partner may owe tax in the state where the partnership operates, the state where the partner lives, or both. Miss a state, and your partner gets a notice from a state they may have never visited. We track every partner’s residency and every state where the partnership has activity.
  • Not Tracking Partner Outside Basis. Each partner is responsible for tracking their outside basis – adjusted for contributions, distributions, income, and losses. Losses are only deductible to the extent of outside basis. Distributions in excess of basis are taxable. If nobody is tracking this (and often, nobody is), partners end up deducting losses they were not entitled to. We maintain basis schedules for every partner.
  • Skipping Section 754 Elections. When a partner sells their interest or dies, a 754 election can be incredibly valuable. Without it, the buying partner or estate may pay tax on built-in gains that do not belong to them economically. Having said that, once made, it is irrevocable and applies to all future transfers. We walk clients through the math before recommending it.

How WCG Handles Partnership Returns

Our approach comes down to a few principles-

  • We prepare K-1s as if each partner is our client. Even when we are only preparing the partnership return, we think about how each K-1 will land on each partner’s personal return. Does this partner have passive activity limitations? Is that partner a real estate professional? Does this K-1 trigger a state filing obligation? We think downstream.
  • We communicate with partners directly. When K-1s are ready, we provide supplemental statements explaining what the K-1 means in plain English – or as close to plain English as partnership tax allows. A K-1 without context is just a confusing tax form, and confused partners make mistakes on their personal returns.
  • We coordinate partnership and personal returns. For clients where WCG prepares both, the K-1 flows directly into the partner’s 1040 without the telephone game of sending documents between firms. This is the cleanest approach and eliminates the most common source of errors.
  • We get K-1s out on time. We prioritize partnership returns early in the season because late K-1s create a chain reaction. Our goal is K-1s in partners’ hands well before the April 15 personal return deadline. For returns on extension, we communicate clear timelines so partners and their CPAs can plan accordingly.
  • We maintain capital account and basis schedules. Tax basis capital accounts and partner outside basis schedules are maintained and reconciled as part of every return. This is not optional anymore – the IRS expects it, and the penalties for getting it wrong are real.

Sidebar: if you have a partner who contributed appreciated property years ago and your previous preparer did not track the Section 704(c) allocations, you have a mess on your hands. We can clean it up, but fair warning – it takes time and involves digging through historical records.

Real Estate Partnership Considerations

Real estate is the most common reason people end up in partnership structures, and it adds layered rules on top of everything above.

  • Passive Activity Rules. Rental income is generally passive under IRC Section 469. Losses can only offset other passive income. There is a limited exception – up to $25,000 of rental losses against non-passive income if AGI is under $100,000, phasing out by $150,000. For a lot of our clients, that exception is already gone.
  • Real Estate Professional Status. If you qualify under IRC Section 469(c)(7), your rental activities are no longer automatically passive. This means rental losses can offset W-2 income, business income – any income. But you need more than 750 hours in real property trades or businesses, and that time must exceed half your total working hours. We see this most often with full-time agents, developers, and property managers. If you are a surgeon who owns a rental on the side, this is probably not your path.
  • At-Risk Limitations. Before passive activity rules even apply, losses must clear the at-risk hurdle under Section 465. For real estate, this generally means your cash investment plus qualified nonrecourse financing from a bank.
  • Cost Segregation Through a Partnership. Let’s say a partnership does a cost segregation study on a $2,000,000 apartment building and generates $400,000 of accelerated depreciation in year one. A partner with a 25% interest picks up $100,000 on their K-1. But can they use it? Only if they have sufficient basis, are at-risk, and can navigate the passive activity rules. Everything is layered.
  • Section 1031 Exchanges at the Partnership Level. Real estate partnerships sometimes want to do like-kind exchanges. This gets tricky because the exchange rules apply to the partnership, not the individual partners. You cannot do a 1031 exchange at the partner level with partnership property. If some partners want to cash out and others want to reinvest, you need creative structuring – sometimes involving partnership distributions before the exchange or drop-and-swap strategies. We work through these scenarios with clients and their attorneys well before the sale closes.
  • Multi-State Headaches. You have a partnership that owns rental property in Arizona, a managing partner in Colorado, and two passive investors in California and New York. That is four potential state filing obligations, each with their own rules, rates, and quirks. California is particularly aggressive – they want their cut, and they want it up front. Some states require the partnership to withhold estimated tax for nonresident partners or file composite returns. We track all of this so your partners do not get surprise notices from states they have never visited.

Key Takeaways

  • Partnership returns are informational, not tax-paying. The partnership files Form 1065, but the tax obligation flows to partners through Schedule K-1. Getting the K-1s right is the whole game.
  • K-1 timing matters. Late K-1s delay every partner’s personal return. We prioritize getting K-1s out early.
  • Tax basis capital accounts are required. Since 2020, the IRS requires tax basis reporting on K-1s. This is an area where we still see widespread errors.
  • Basis tracking is not optional. Each partner needs outside basis tracked to determine loss deductibility and distribution treatment.
  • Special allocations must meet substantial economic effect. You can split things however you want, but the IRS has rules about whether those splits are respected. Do not wing this.
  • Real estate partnerships layer multiple rule sets. Basis limitations, at-risk rules, passive activity rules, and real estate professional status all interact.
  • State filing can multiply complexity. Partnerships with partners in multiple states may trigger filing obligations everywhere a partner resides or the partnership does business.
  • Section 754 elections are powerful but permanent. They can save incoming partners a lot of tax, but once made, they apply to every future transfer.

FAQs

What is the filing deadline for Form 1065?

Form 1065 is due March 15 for calendar-year partnerships. An automatic six-month extension pushes it to September 15. We recommend filing or extending by March 15 so K-1s are available for partners to file their personal returns.

Do I need a partnership return if my LLC only has two members?

Yes. A multi-member LLC is treated as a partnership by default. You need to file Form 1065 and issue K-1s to each member. Exceptions include S or C corporation elections, or the Qualified Joint Venture election for married couples in community property states.

What is the penalty for filing a late partnership return?

The penalty under IRC Section 6698 is $235 per partner per month (or fraction of a month) the return is late, up to 12 months. For a four-partner partnership, that is $940 per month. It adds up fast.

What is the difference between guaranteed payments and distributions?

Guaranteed payments are payments to a partner for services or capital use, determined without regard to partnership income. They are ordinary income to the partner and deductible by the partnership. Distributions are returns of capital and are generally tax-free to the extent of basis. Mixing these up changes the tax result for everyone.

Can partnership losses offset my W-2 income?

Maybe. Losses flow through on your K-1 but face three layers of limitation – basis, at-risk, and passive activity. If the activity is passive (as most rentals are), losses can only offset passive income unless you qualify as a real estate professional or fall under the $25,000 rental loss allowance.

What is a Section 754 election and when should we make one?

A 754 election allows the partnership to adjust inside basis when a partner sells their interest or dies. It can prevent the new partner from paying tax on gains already reflected in their purchase price. Having said that, once made, it is irrevocable. We model the impact before recommending it.

We have partners in different states. Does the partnership need to file in every state?

Generally yes – the partnership files in every state where it does business or has nexus. Individual partners may also need to file in states where the partnership operates. We handle the multi-state analysis as part of the engagement.

What is tax basis capital account reporting?

Since 2020, the IRS requires capital accounts on Schedule K-1 be reported using the tax basis method – tracking contributions at tax basis, distributions at fair market value, and allocations of taxable income and deductions. The IRS uses this to cross-check partner basis.

Can WCG prepare both the partnership return and the partners’ individual returns?

Yes, and we recommend it. When we prepare both, the K-1 data flows directly into each partner’s personal return without sending documents between firms. It eliminates errors and ensures everything ties together.

How do cost segregation studies affect partnership K-1s?

A cost segregation study accelerates depreciation by reclassifying building components into shorter-lived categories. Let’s say a study on a $3,000,000 building generates $600,000 of first-year depreciation. A 50% partner picks up $300,000 on their K-1. But that $300,000 is still subject to basis, at-risk, and passive activity limitations on the partner’s personal return.

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