CPA Fee Benchmark: What Tax Prep Really Costs

The average fee to prepare an itemized Form 1040 with Schedule A and a state return runs $323, according to the National Society of Accountants’ most recent biennial Income and Fees survey (2020–2021 data). A Schedule C for a sole proprietor adds about $192 more. Yet the same survey shows tax preparers billing $180 an hour for return prep — which means the flat-fee quote you receive and the hourly rate buried in the engagement letter describe two entirely different pricing logics, and most clients never reconcile them.

That gap is where overpayment lives. This benchmark breaks down what certified public accountant (CPA) tax work actually costs by form, by billing structure, and by the complexity tiers that matter to high earners — then applies the Finluxy Advisor Fee Drag to show what those fees cost over a decade if invested instead.

The numbers at a glance

Five figures frame what tax preparation costs and what those costs compound to. The first three come from the NSA survey; the wage figures come from BLS.

Sources: National Society of Accountants, Income and Fees of Accountants and Tax Preparers in Public Practice, 2020–2021; U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics, May 2024.

What each form actually costs

Tax preparers price most individual work as flat fees per form, not as a single bundled rate. The NSA survey itemizes them, and the spread between a simple return and a complex one is wider than most fee conversations admit.

A Form 1040 with a state return and no itemized deductions averaged $220 in the 2020–2021 survey. Adding Schedule A — the itemized deduction schedule — pushes the average to $323. A Schedule C for self-employment or a sole proprietorship adds roughly $192 on top of the base return. A full corporate Form 1120 averages $913. These are additive: a high earner with a consulting LLC, a rental property, and an investment portfolio is not paying $323; they are stacking schedules, and the bill climbs accordingly. For households weighing whether to fold tax work into a broader engagement, the financial planner versus wealth manager cost comparison shows where tax prep overlaps with planning fees.

Source: National Society of Accountants, Income and Fees survey, 2020–2021. Figures are national averages and predate recent inflation; current quotes in high-cost-of-living metros frequently run well above these.

One caution on the flat-fee figures. The NSA survey was last published for the 2020–2021 period, and consumer prices have risen materially since. A $323 itemized return at 2020 pricing translates to a meaningfully higher figure in current dollars — secondary aggregators applying CPI adjustments have placed the inflation-adjusted itemized return near $380 or more. Treat the NSA numbers as a structurally accurate ranking of relative cost, not as a 2026 price sheet.

Flat fee versus hourly: the structure that bites

Here is the contradiction the survey exposes. The same preparers who quote $323 for an itemized return bill $180 an hour for tax work. A clean, organized itemized return takes a competent preparer perhaps one to two hours. At $180 hourly, that is $180 to $360 — bracketing the flat fee almost exactly. The flat fee, in other words, is a productized version of the hourly rate built around an assumption of organized inputs.

Break that assumption and the economics flip. When a client arrives with disorganized records, the work shifts to the clock, and the hourly meter runs against tasks the flat fee never contemplated. The NSA data shows preparers charge extra for incomplete files, expedited returns, and late-submitted information. The lesson for a $150k+ filer with multiple income streams: ask which structure governs your engagement before signing, because a flat quote that quietly converts to hourly billing on “complex” work removes any cost ceiling. The same dynamic appears across professional services — the business attorney retainer cost structure rewards the firm for ambiguity in the same way.

Hourly billing also tracks the labor market. BLS reported the median annual wage for accountants and auditors at $81,680 in May 2024, with the top 10% earning more than $141,420 and the bottom 10% under $52,780. A solo CPA billing $180 an hour against a six-figure salary is pricing scarcity and credential, not just time — which is why a more experienced preparer’s higher rate can still produce a lower total bill if they work faster and catch more.

The Finluxy Advisor Fee Drag, applied to tax fees

A one-time tax-prep fee of a few hundred dollars looks trivial. The same logic that makes a CPA bill look small is exactly the logic that makes an asset-based advisory fee look small — and that is where the Finluxy Advisor Fee Drag earns its keep. The metric expresses an annual advisor fee as a percentage of the portfolio, then models what that same money would have compounded to over 10 years at a 7% growth assumption.

Tax prep at $323 a year is not the threat here; it is a rounding error against a portfolio. The threat is the assets under management (AUM) fee a wealth manager charges the same household — frequently 1.0% — which the Fee Drag exposes as a recurring drain rather than a one-time cost. Modeled across representative asset levels and the standard 0.5%, 1.0%, and 1.5% AUM fee tiers:

Finluxy calculation. Fee Drag = (annual fee × 10-year compounding factor at 7%) ÷ initial portfolio × 100, consistent with the cluster’s $1M/1% reference case of $140,971. Illustrative; assumes a constant fee and growth rate.

The mechanics of that compounding are unpacked further in how advisor fee drag compounds over time and quantified over a longer window in what a 1% AUM fee costs over 20 years.

What the data shows that most coverage misses

Read the Fee Drag table column by column and a pattern jumps out: the percentage is identical at every portfolio size. A 1.0% fee produces a 14.1% Fee Drag whether the portfolio is $500,000 or $3 million. The dollar amounts scale; the proportional damage does not. This is the point most fee coverage buries by quoting absolute dollars — “$10,000 a year” sounds negotiable on a $1 million account and outrageous on a $500,000 one, when the proportional erosion is the same.

That reframing changes the comparison that actually matters. A $323 CPA fee is a one-time, fixed-dollar cost that does not recur or compound. A 1.0% AUM fee is a recurring, percentage-based cost that compounds against the entire portfolio every year. A household scrutinizing the tax bill while waving through the advisory fee has the risk exactly backwards. The CPA is cheap and finite; the AUM fee is the one that quietly removes a sixth of a decade’s potential wealth. Whether that AUM fee buys anything in return is a separate question — and the SPIVA evidence on active management, covered below, suggests it often does not.

The value question: does the fee buy alpha?

Tax preparation has a defensible value proposition: a competent preparer who finds one missed deduction or credit can recover the fee in a single line. The harder case is the AUM advisor who justifies a percentage fee by claiming superior investment returns — alpha, meaning excess return above a benchmark, net of fees.

The data does not support the claim at scale. The S&P Indices Versus Active (SPIVA) U.S. Scorecard for year-end 2024 found that 84.34% of actively managed large-cap U.S. equity funds underperformed the S&P 500 over the trailing 10-year period — roughly one in six beat the benchmark before the advisor’s own fee is even layered on top. Over the 15-year window, S&P Dow Jones Indices reported no equity category in which a majority of active managers outperformed. An advisor charging 1.0% to select active managers is stacking a fee on a strategy that loses to a low-cost index fund most of the time. For households reconsidering that arrangement, the 10-year net cost of robo versus human advisors and when a second opinion on your advisor pays off both apply the same net-of-fee test.

Practical context for the $150k+ household

At $150k+ in income, the tax-prep decision is rarely about whether to hire a preparer — complexity usually settles that — but about matching the engagement structure to the return. A W-2 household taking the standard deduction is overpaying if it accepts an hourly engagement for what is a $220 flat-fee return. A household with a Schedule C, rental income, equity compensation, and capital gains is in genuinely hourly territory, and the relevant question becomes whether the preparer’s $180 rate is buying planning that lowers next year’s liability, not just compliance that records last year’s.

The trade-off worth pricing deliberately: a fee-only advisor (one earning no commissions, distinct from a fee-based advisor who may) charging a flat planning fee or hourly rate for tax-integrated planning can deliver the coordination an AUM relationship promises, without the percentage drag the Fee Drag table quantifies. A household paying 1.0% on a $1 million portfolio is absorbing roughly $140,971 in foregone compounding over a decade — capital that would more than fund a lifetime of flat-fee tax and planning work several times over. The threshold question for this income bracket is not “can I afford a CPA,” but “am I paying a fixed fee for finite work, or a percentage fee for a service the SPIVA data says underdelivers.” Run the structures side by side, the way the fee-only versus AUM advisor cost breakdown and the broader financial advisor cost guide for $150k+ clients lay out, before defaulting to whichever your current provider prefers to bill.