The IRS charges no fee to file Form 1065 itself. The cost to file Form 1065 is what you pay a preparer or software vendor, plus whatever your state charges on top. For a straightforward two-member partnership with clean books, a CPA-prepared federal return typically runs $800 to $1,500. Complex partnerships with multiple states, many partners, or foreign transactions can run $3,500 to $10,000 or more. Self-filing with specialized software costs less upfront but shifts the entire compliance burden onto you.
What Actually Drives Your Bill
Complexity is the single biggest factor. A two-person consulting partnership with one income stream and clean QuickBooks records is a fundamentally different job than a real estate partnership with ten members, depreciation schedules, and operations in three states.
The number of partners matters because each one requires a separate Schedule K-1 reporting their individual share of income, deductions, and credits.1Internal Revenue Service. 2025 Instructions for Form 1065 That per-partner work adds up fast. So does the variety of income on the return. Passive income, rental real estate, foreign transactions, and capital gains all pull in more forms and analysis. Special allocations where partners don’t split everything equally, and the capital account reconciliation work that follows, multiply the effort involved.
The condition of your books matters too. If a CPA has to spend hours sorting through shoebox records before starting the return, that cleanup time gets billed.
What CPAs Charge to Prepare Form 1065
CPAs and tax accountants typically use either a flat fee based on anticipated complexity or an hourly rate. Hourly rates for partnership tax work generally run $150 to $400, depending on the firm’s size, location, and specialization. Flat fees are more common because they give the partnership a predictable number for a defined scope of work.
Simple Partnerships: $800 to $1,500
Two or three domestic partners, minimal operating expenses, and organized records fit this tier. These returns involve basic operating income, few fixed-asset transactions, and straightforward equal splits among partners. If your books are truly clean, some smaller firms and enrolled agents come in at the lower end of that range.
Medium Complexity: $1,500 to $3,500
Returns at this level typically involve more than three partners, inventory tracking, a rental property, or guaranteed payments to working partners. These partnerships often operate in a single state but may have less organized books that need moderate cleanup. Depreciation on multiple assets or minor asset sales during the year also push preparation into this tier.
High Complexity: $3,500 to $10,000+
Multi-state operations trigger this range because of state-specific apportionment calculations. Partnerships with numerous partners, foreign partners requiring specialized reporting, or significant asset depreciation schedules land here as well. Much of the CPA’s time at this level goes toward reconciling complex capital accounts and navigating the centralized partnership audit regime rules that apply to larger partnerships.
The Software Route
Self-filing through commercial tax software costs less upfront but transfers every compliance decision to you. Standard consumer tax software like TurboTax or H&R Block’s personal edition cannot handle Form 1065. You need a professional or business-grade package specifically designed for partnership returns.2Internal Revenue Service. 1065 Modernized e-File (MeF) Providers
These specialized packages typically run $300 to $1,000 per tax year for the federal return. They include the necessary forms and calculation engines to generate Schedule K-1s for each partner. If you operate in multiple states, expect to pay an additional $50 to $150 per state module. Some providers also charge separate per-return e-file transmission fees on top of the software license.
The real limitation is that software only processes what you enter. It won’t flag a misclassified income item, question your special allocation logic, or catch a partner basis calculation error. Those kinds of mistakes lead to IRS penalties and potential audits. Software makes sense for simple, low-activity partnerships where at least one partner has solid tax knowledge. For anything more complex, the savings over a CPA often aren’t worth the risk.
State Returns Add to the Total
The federal Form 1065 is only part of the picture. Nearly every state requires a separate partnership return, and each one adds to the total cost. CPA fees for state returns commonly range from $300 to $1,000 per state, depending on the complexity of that state’s tax rules and apportionment requirements.
Multi-state operations amplify costs significantly. Each state where the partnership does business requires its own apportionment calculation to determine what portion of income is taxable there. Beyond preparation fees, many states impose entity-level taxes or annual filing fees on partnerships regardless of whether the partnership owes federal income tax. These state-imposed fees range from under $100 to several thousand dollars depending on the state and the partnership’s revenue or asset level. They are separate from and in addition to whatever you pay your CPA.
The Cost of Filing Late
Missing the deadline without an extension is one of the most expensive mistakes a partnership can make. Under Section 6698 of the Internal Revenue Code, the IRS charges a penalty for each month (or partial month) a return is late, up to a maximum of 12 months.3Office of the Law Revision Counsel. 26 USC 6698 – Failure to File Partnership Return The penalty is assessed per partner, which means it scales quickly.
For returns required to be filed in 2026, the penalty is $255 per partner for each month the return is late.4Internal Revenue Service. Rev. Proc. 2024-40 A five-partner partnership that files six months late would face a penalty of $7,650 ($255 × 5 partners × 6 months). At the 12-month maximum, that same partnership would owe $15,300. The penalty applies even though partnerships don’t owe income tax themselves.
Small Partnership Relief
Partnerships with 10 or fewer partners may qualify for automatic penalty relief under IRS Revenue Procedure 84-35, which treats qualifying small partnerships as having reasonable cause for a late or incomplete return. To qualify, every partner must be a natural person or an estate (no corporations, trusts, or other partnerships), and each partner’s share of every item must be in the same proportion. A married couple counts as one partner for this threshold.
Each partner must also have fully reported their share of the partnership’s income, deductions, and credits on a timely filed individual return. If a partner’s individual return understated partnership items by more than a trivial amount, the relief disappears. This provision won’t help if you simply forgot to file the 1065 and also didn’t report the income on your 1040.
Bookkeeping and the Deduction
Bookkeeping is the hidden cost that inflates many preparation bills. If your records arrive in rough shape, your CPA will spend billable hours organizing transactions before the return work even begins. Partnerships that maintain clean books throughout the year, either through a dedicated bookkeeper or accounting software like QuickBooks, pay less at tax time because the CPA can start on the return immediately.
Preparation fees are a tax-deductible business expense for the partnership, which offsets some of the cost. The deduction covers both professional fees and software purchases used for partnership tax compliance. That won’t make the bill painless, but the after-tax cost is lower than the invoice amount.