Financial Advisor for Retirement Planning: Why Flat-Fee Works Better

For informational purposes only — not financial, tax, legal, or investment advice. Your situation may differ.

Retirement planning is not investment management. It's a series of interconnected decisions about when to claim Social Security, how much to convert to Roth before RMDs begin, how to sequence withdrawals from taxable and pre-tax accounts to manage IRMAA and ordinary income brackets, when to begin Medicare, and how to structure your estate so assets pass efficiently. These decisions, made over a 10-to-15-year window before and after retirement, can move $200,000 to $500,000 between your heirs and the IRS on a mid-seven-figure portfolio.

The advisor structure that gets you through those decisions matters. Here's why.

What Comprehensive Retirement Planning Covers

Retirement planning done right involves at least six distinct planning domains, each with its own annual decisions:

• Tax sequencing and Roth conversions. The window between retirement and age 73 (or 75 for those born in 1960 or later)¹ is the best opportunity most investors will have to convert pre-tax money to Roth at low rates. The 22% federal bracket for married filers extends to $211,400 of taxable income in 2026.² Converting to fill that bracket each year — while avoiding IRMAA tiers and Social Security taxation thresholds — is the core retirement tax planning work. See: Retirement Tax Planning with a Flat-Fee Advisor.
• Withdrawal strategy and sequencing. Which accounts you draw from first — taxable, traditional IRA, or Roth — affects your tax rate, IRMAA exposure, and portfolio longevity across decades. The right sequence changes each year as your bracket situation and RMD requirements evolve. See: Retirement Withdrawal Strategy.
• Social Security timing. Claiming at 62 versus 70 changes your annual benefit by 77%.³ For married couples, coordinating two claiming ages — including spousal and survivor optimization — can be worth $100,000–$300,000 in lifetime benefits. This interacts directly with your Roth conversion window: delaying SS compresses the low-income years you need for conversions. See: Social Security Claiming Strategy.
• Medicare and IRMAA management. Medicare Part B base premium in 2026 is $202.90/month per person.⁴ If your modified adjusted gross income exceeds $218,000 (MFJ), that jumps to $284.10/month — a $975/year per-person surcharge. Higher IRMAA tiers reach $689.90/month. The IRMAA threshold is triggered by income two years prior, so Roth conversion planning in 2026 determines your 2028 Medicare premiums. One poorly modeled conversion can add $2,000–$4,000/year in Medicare costs for a couple.
• RMDs and charitable planning. Required minimum distributions from traditional IRAs and 401(k)s begin at age 73 or 75 and force taxable withdrawals regardless of need. If you're charitably inclined, Qualified Charitable Distributions let you transfer up to $111,000 directly from an IRA to charity in 2026 — counting toward your RMD but excluded from taxable income.⁵
• Estate and beneficiary planning. The 2026 federal estate exemption is $15 million per person ($30M for married couples) under the One Big Beautiful Bill Act — permanently eliminating the prior sunset risk.⁶ For most investors, the estate planning focus shifts to inherited IRA rules (10-year distribution requirement for most non-spouse beneficiaries), step-up in basis planning, and beneficiary designations on retirement accounts. See: Estate Planning with a Flat-Fee Advisor.

Why AUM Fees Are the Wrong Model for Retirement Planning

The AUM model aligns advisor incentives with asset growth — which works reasonably well during accumulation. In retirement, three structural problems emerge:

1. Roth conversion conflicts. A Roth conversion moves money out of a traditional IRA (in AUM) into a Roth IRA (also typically in AUM), so the math is neutral — until you consider that the tax payment itself comes from an outside account and reduces total assets under management. An advisor paid on AUM has a subtle financial incentive against recommending large conversions, even when they'd save you six figures in lifetime taxes.
2. Drawdown as revenue loss. Every $100,000 you spend in retirement costs your 1%-AUM advisor $1,000/year in ongoing revenue. A flat-fee advisor's income doesn't change whether your portfolio is $2M or $3M — their advice on how much to spend is not colored by what that spending does to their paycheck.
3. Investment management vs. planning. The bulk of what moves the needle in retirement is planning decisions — tax sequencing, SS timing, Medicare optimization — not investment returns. An AUM advisor whose business model is built on managing investments may underdeliver on the planning that actually matters most in this phase of your financial life.

What Flat-Fee Retirement Planning Costs

Retirement planning engagements with flat-fee advisors typically take one of three forms:

Compare any of these to AUM advisory at 1% on $3M: $30,000/year, every year, whether or not you receive meaningful planning advice. If you manage your own investments but want the retirement tax math done correctly by a professional, the hourly or one-time engagement is usually the right scope. See: One-Time Financial Plan: What It Covers and Hourly Financial Advisor: What to Expect.

Pre-Retirement Accumulation: Building Toward a Tax-Efficient Exit

The decisions made in the 5–10 years before retirement also matter. If you're still working, the planning priorities shift:

• Maxing tax-advantaged accounts. In 2026, you can defer $24,500 into a 401(k), plus $8,000 in catch-up contributions if you're 50 or older — $35,750 if you're ages 60–63 (the SECURE 2.0 super-catch-up).⁷ A flat-fee advisor can help model whether Roth or traditional elections are better given your projected retirement tax rates.
• Account structure decisions. How much of your portfolio is in Roth versus traditional versus taxable determines what flexibility you'll have in retirement. Overly concentrated in pre-tax accounts creates a mandatory conversion problem later.
• Equity compensation. RSUs, stock options, and deferred compensation create overlapping income in specific years that require careful sequencing with the rest of your tax picture. See: Deferred Compensation Planning.

Who Needs a Flat-Fee Retirement Planner

The economic case for flat-fee is strongest when:

• You have $750,000+ in investable assets — where AUM fees become economically punishing relative to the advice received
• You're within 10 years of retirement and want to optimize the pre-RMD Roth conversion window
• You self-manage your investments but need professional planning for the complex decisions — SS timing, IRMAA management, estate beneficiary review
• You're already retired and paying 1% AUM on a portfolio that's drawing down, with no evidence your advisor is doing active tax planning
• You've inherited retirement assets and need guidance on the 10-year distribution window and inherited IRA rules

If you're managing your own index fund portfolio and just want someone to model your Roth conversion math and SS timing before you retire, that's a well-defined project — not a reason to enter a perpetual 1% AUM relationship.