Tax season for alternative investors is not one event. It is a drawn-out process that starts in February, peaks in April, extends through September for most people with K-1s, and occasionally resurfaces in October when amended forms arrive from funds that got their numbers wrong the first time.
Most CPAs who work with individual investors are good at what they do. What they are sometimes less confident about is the specific complexity that alternative investments introduce — not because they are not capable, but because this is still a relatively specialized area and the volume of detail can be significant.
The investors who get through this process cleanly are the ones who come organized and ask the right questions upfront.
The basic timeline
Understanding when things happen helps you manage the process rather than react to it.
January through February is when simple tax documents arrive — W-2s, 1099s, brokerage statements. If your financial life consisted only of these, you could file in February and be done.
March 15 is the deadline for partnership tax returns — the Form 1065 that your funds file before issuing your K-1. Many funds extend as a matter of course, pushing K-1 delivery into the summer or fall. This is normal and expected. It is not a sign that something is wrong with your investment.
April 15 is your personal filing deadline. If you are still waiting on K-1s — and you likely will be — file an extension using Form 4868. Filing an extension does not extend when taxes are due, only when the paperwork is due. If you owe taxes, estimate and pay by April 15.
September 15 is when extended partnership returns are due, meaning most K-1s arrive by then. Your extended personal deadline is October 15.
Tell your CPA this timeline early in the year. Not every accountant is familiar with how late K-1s legitimately arrive, and some will pressure you to file before your documents are complete.
What to actually hand your CPA
The handoff is simpler than many investors make it. Send your K-1s — complete, including all supplemental pages — and let your CPA work from there. The K-1 contains what they need: your share of income, losses, deductions, and credits from the fund, along with the information required for basis calculations and passive activity analysis.
If you received a 1099 from any fund structured as a REIT or BDC rather than a partnership, include that as well.
What helps beyond the documents themselves: a brief note flagging any significant events during the year. If a fund sold a major asset, completed a refinancing, called capital, or communicated anything material to LPs, mention it. These events can have tax implications that may not be fully captured in the K-1, and your CPA should know to look.
Beyond that, let them ask you what they need. A good CPA will.
Ask directly if they have handled alternative investments before
There is no reason to be indirect about this. Before engaging a CPA — or at the start of a new relationship — ask them plainly: have you worked with clients who invest in private equity funds, real estate syndications, or private credit? Are you comfortable with K-1s from partnerships, passive activity loss rules, and basis tracking across multiple funds?
A CPA who has done this before will answer confidently and specifically. They will mention passive activity rules, suspended loss carryforwards, depreciation recapture at exit, and potentially state filing obligations from funds that invest across multiple states. They will not need to look these up.
A CPA who is less familiar may still be perfectly capable — but you want to know that going in, so you can ask the right questions and not assume everything is being handled correctly.
What experienced CPAs watch for
A few specific areas where alternative investment returns require more than a standard approach.
Passive activity losses. Losses from private fund investments are typically passive, meaning they can only offset passive income — not wages or business income — unless you meet specific exceptions. Suspended passive losses carry forward until you have passive income to offset, or until the investment is sold. A CPA who tracks your carryforward balances year over year and flags opportunities to use them is doing the job correctly.
Basis. Your outside basis in a partnership determines whether losses are deductible and affects the gain calculation when the fund exits. It needs to be updated annually based on your K-1. If your CPA is not discussing basis with you, ask about it.
Depreciation recapture. When a real estate fund sells its assets, the gain attributable to prior depreciation is taxed differently from appreciation. This can meaningfully affect what you owe at exit. If a fund you are in is approaching a sale, ask your CPA to model the recapture before the transaction closes.
State filings. Funds that invest in assets across multiple states may create filing obligations in states where you do not live. Your K-1 will typically include state-level information. Whether that creates a filing requirement depends on thresholds and structures that vary by state. Not every CPA flags this automatically — worth asking about.
The one habit that makes everything easier
Every alternative investor eventually learns this, usually after one difficult tax season: keep a running record of each investment — what you put in, what has come back in distributions, and the current reported NAV.
You do not need anything elaborate. A record with one entry per investment, updated when K-1s arrive each year, is enough. It makes K-1 reconciliation faster, keeps your basis records intact, and gives you a clear picture of what your portfolio is actually doing beyond what any individual fund report tells you.
It also makes the conversation with your CPA faster and more productive — which, at billing rates, is worth something in itself. If you are tracking multiple alternative investments and find yourself rebuilding this information from scratch every spring, it may be worth looking at a purpose-built tool that keeps contribution history, distribution records, and NAV in one place year-round.