Retirement & Tax Planning Answers

Which Financial Planning Services Offer Flat-Fee Options for Retirement Tax Advice?

Reviewed by Raman Singh, CFP® · Enrolled AgentUpdated
Financial Planning

Quick answer

Four service models typically offer flat-fee retirement tax advice: independent fee-only RIAs that charge an annual planning retainer covering tax strategy alongside everything else; planning-only firms with no investment management at all, charging a project fee for a standalone tax and retirement plan; combined CPA/EA-and-CFP® practices that bundle tax preparation and tax planning under one fee; and hourly or project-based consultants who answer a specific tax question, like a single Roth conversion decision, without an ongoing relationship. Each serves a different need, and the right one depends on whether you want an ongoing plan or a one-time answer.

Independent fee-only RIAs are the most common source of comprehensive flat-fee retirement tax advice. These firms typically charge an annual retainer, often in the $5,000 to $15,000 range depending on complexity, that covers tax planning as one piece of a broader plan alongside investment guidance, Social Security claiming, and Medicare strategy. The tax work is ongoing rather than a one-time deliverable, which matters because retirement tax strategy changes year to year as income, tax law, and account balances shift.

Planning-only firms go a step further by not managing investments at all. Their entire fee is for the plan itself, often billed as a one-time project fee for an initial plan followed by a smaller ongoing fee for ongoing planning access. This model suits people who want a proactive tax strategy but manage their own portfolio or already have an investment manager elsewhere.

A smaller number of firms combine tax preparation and tax planning under a CPA or EA who also holds a CFP® or works alongside a financial planner. The advantage is that the person building the Roth conversion plan is the same person, or works directly with the same person, who files the actual return, closing the gap that often exists when a financial planner and a tax preparer never talk to each other.

Hourly or project-based consultants offer flat-fee advice for a narrower purpose: answering a specific question, like whether to convert this year or wait, without an ongoing engagement. This is the right fit for someone who wants a second opinion on one decision rather than a standing relationship, but it doesn't provide the year-over-year monitoring that Roth conversion windows and IRMAA thresholds actually require.

Match the service model to what you actually need. A single question deserves an hourly consultation. An ongoing, multi-year retirement tax strategy, which is what most pre-retirees and retirees with $1M or more actually benefit from, deserves an ongoing retainer relationship, not a one-time project.

Ask any firm you're considering exactly which of these models they operate under, since the answer determines both the price and how the tax work gets maintained over time.

  • Hiring a one-time project firm for what is actually an ongoing need, then having no one monitoring the plan the following year when income or tax law changes.
  • Assuming a combined CPA/CFP® practice is automatically better. The credential matters less than whether the firm actually documents and updates a forward-looking tax strategy, not just files last year's return.
  • Not asking whether investment management is bundled into the fee or billed separately, since that changes the effective cost of the tax planning itself.

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