MaxiFi vs. Boldin: Which Retirement Planner Is Best for You?

Consumption Smoothing vs. Chance of Success: The Core Philosophical Split

MaxiFi is based on an idea called consumption smoothing, drawn from the life-cycle theory of saving that economists have used for decades. The premise: households get more value from a stable standard of living than from a spending plan that swings year to year. MaxiFi’s algorithm looks at your full financial picture and calculates the highest, steadiest spending level it can support from now through the end of your life. Social Security, withdrawal, and Roth conversion optimizations center around that number.

The Boldin Planner works from the other direction. You define your spending: go-go years, slow-go years, big one-time expenses, or a detailed budget across dozens of categories if you want that level of control. Boldin then tells you the odds that your plan supports it, using Monte Carlo simulation to produce a Chance of Success score. It enables you to explore optimizations (debt pay down, Social Security, Roth conversions and withdrawals) and stress test your plan against risks.

Both frameworks are legitimate ways to think about retirement math. MaxiFi’s approach fits if you’d rather the software hand you a single number and plan around it. Boldin’s approach fits if you already know what kind of retirement you want and need to test whether your money supports it, then keep testing it as your situation changes.

Boldin AI vs. MaxiFi: Built-In Guidance vs. DIY Interpretation

Boldin AI answers plain-language questions using your actual plan data: your accounts, assumptions, and projections. Ask what happens if you retire two years early or whether a Roth conversion makes sense at your income level. It responds in context, with analysis of the hypothetical situation and the ability to apply the changes to your plan after you review and approve them.

Boldin AI is on every tier: Basic users get 5 questions a day, PlannerPlus users get up to 200 per conversation with no limit on conversations. PlannerPlus users can also use Boldin AI to build or update their plan. Tell it what you want to change, like adding a new account or updating a salary, and it drafts the update for you to review before anything is applied.

PlannerPlus users can skip data entry by uploading a statement or document to Document Vault (beta), then asking Boldin AI to analyze and use it. For example, “update my plan based on this statement,” or “look at my tax return and tell me my risks.” Boldin AI reads the document and proposes the matching updates, still subject to your review before anything saves.

MaxiFi has no built-in AI assistant. Interpreting the output, especially the wide range of outcomes a Monte Carlo report returns, is left to you. One independent reviewer who tested MaxiFi’s Premium tier ran into exactly that problem: a spending range stretching from $50,000 to $200,000 a year depending on market returns, with no clear signal for which number to actually plan around. That’s the tradeoff. MaxiFi’s numbers are detailed. What to do with them is on you, unless you’re on Premium Plus and use the guided session that comes with it.

How Boldin and MaxiFi Handle Monte Carlo Simulation

Boldin runs 1,000 simulations built around your assumed rate of return. You can connect the result to Spending Guardrails: a Safe Spending Target calibrated to roughly an 80% success rate, with upper and lower bands that tell you when to adjust.

As Boldin founder Steve Chen told the Wall Street Journal, the point of the simulation is to show you “the range of possible outcomes. It’s not a guarantee but a way to guide your decisions and avoid catastrophic mistakes.”

MaxiFi’s version is called Living Standard Monte Carlo. Where a conventional Monte Carlo analysis holds your spending level fixed and calculates the odds your assets last the full plan, MaxiFi flips which variable moves. It holds your Base Plan’s near-certain success probability fixed and lets your annual living standard adjust year to year as markets do.

You can run it two ways. Upside Investing treats your stock holdings as money you don’t touch until it’s converted to safe assets, so your living standard floor holds steady regardless of how stocks perform, then rises as gains get locked in. Full Risk Investing has you spending from both safe and risky assets each year, producing a wider range of possible living standards. Either way, the output is a set of living-standard trajectories, not a single success percentage.

The two tools are answering slightly different questions with their simulations. Boldin asks whether your chosen, fixed spending plan survives a range of market outcomes. MaxiFi asks how your spending would need to flex, year to year, to keep that plan’s odds of success near-certain.

Roth Conversion Strategy: Full-Plan Optimization vs. Iterative Search

A Roth conversion moves pre-tax money into a Roth account, triggering tax now in exchange for tax-free growth later. Both tools support conversion planning. They get there differently.

Boldin’s Roth Conversion Explorer, on PlannerPlus, lets you test four strategies against your already-integrated Social Security timing, RMD schedule, and healthcare costs: maximize estate value, minimize lifetime taxes, convert up to your income tax threshold, or convert up to your IRMAA threshold. Each shows the year-by-year tax cost against your full plan.

MaxiFi’s Roth Conversion Optimizer takes an iterative approach. It searches across many possible conversion patterns to find the sequence that raises lifetime discretionary spending, after first asking how much short-term spending you’re willing to trade for a better long-term number.

Both are capable tools for the same underlying decision: finding the window, usually somewhere between retirement and RMD age, where your tax rate is lower than it will be later. Which one gets you there depends on whether you want to see the search happen inside your full plan or trust an optimizer to run in the background.

What Does MaxiFi Do That Boldin Doesn’t?

Survivor planning. MaxiFi’s Survivor Report calculates how much life insurance keeps a surviving spouse at the same living standard they’d have had with both partners alive, then adjusts that figure for contingencies you set, an earlier retirement, a paid-off mortgage, a reduced expense. Boldin can model the financial consequences of the first spouse’s death: separate longevity assumptions per spouse, the survivor Social Security switch, RMD and asset transitions, and the move to single-filer tax treatment. It doesn’t include MaxiFi’s specialized, year-by-year life-insurance-needs calculation.

More scenario headroom. MaxiFi supports up to 25 saved scenarios against Boldin’s 10, though both compare a similar number side by side (3 versus 2–3).

Academic pedigree. MaxiFi’s optimizer runs on proprietary calculations that aren’t published, which is why reviewers who’ve tested the tool directly describe it as hard to independently verify. The theory behind it, economist Laurence Kotlikoff’s consumption-smoothing framework and the life-cycle theory it draws on, predates either company, and some tax-complex households and fee-only advisors value that grounding regardless.

A wider search across conversion sequences. MaxiFi’s Roth Conversion Optimizer runs an iterative search across many possible conversion sequences to find the one that minimizes lifetime taxes, though MaxiFi doesn’t publish a benchmark showing how much that broader search changes the outcome versus a fixed strategy. Boldin’s four preset strategies (maximize estate, minimize lifetime taxes, convert to a tax threshold, convert to an IRMAA threshold) cover the goals that drive most Roth conversion decisions, so the wider search matters most for the tax situations a preset doesn’t fit.

What Does Boldin Do That MaxiFi Doesn’t?

Holistic financial wellness scoring. Boldin rates your full financial picture (savings rate, debt, taxes, housing, estate plans) across 15+ metrics with personalized guidance on each one. MaxiFi’s planning centers on the retirement spending calculation itself, without a standalone wellness score.

A free tier and a lower-cost paid plan. Boldin’s Basic plan costs nothing, and PlannerPlus runs $144 a year. MaxiFi has no free version and no free trial. Its entry price of $109 doesn’t include Monte Carlo or the Roth Optimizer; those require the $149 Premium tier.

Boldin AI. Plain-language insights and scenario answers on every plan tier. On PlannerPlus, prompt it to update your plan, add an account, read a document from Document Vault, and it drafts the change for your review before anything saves.

Linked accounts. Boldin connects to your financial institutions through Plaid, Finicity, and MX, so balances stay current without manual updates. MaxiFi asks for total balances in your pre-tax, Roth, and taxable buckets, entered and updated by hand.

Asset allocation tracking. MaxiFi’s own FAQ states plainly that it isn’t built as an asset allocation tool. Its optional Full Risk Investing mode lets you set a stock/bond split for your retirement and regular-asset buckets, but that’s still an assumption applied to a bucket rather than a breakdown of individual holdings. Boldin’s Investments feature, on PlannerPlus, handles it at the position level instead. Connect an account and it syncs daily, or key in a ticker and dollar amount by hand. Either way, the holding gets classified into one of 8 asset classes and totaled across your accounts, measured against your Risk Tolerance Survey target.

An in-house CFP® advisory arm. Boldin Advisors offers a flat $3,200 Retirement Plan Checkup, two sessions with a fiduciary CFP® and no assets under management required, plus ongoing advisory starting at $1,200 a year for continued support. MaxiFi has no CFP advisory arm. Its Premium Plus tier includes a single guided setup session.

Account Syncing and Security on Boldin and MaxiFi

Boldin links directly to your accounts and is SOC 2 Type 2 compliant, using 256-bit encryption across all data. Boldin also requires multi-factor authentication on all accounts.

That same link carries into the Investments feature, so the accounts you connect here feed straight into your asset-class breakdown. You can add positions by hand too. Either path lands in one of 8 asset classes, weighed against your Risk Tolerance Survey target. MaxiFi doesn’t have a parallel. It calculates a sustainable spending number, and portfolio sorting sits outside that scope.

MaxiFi documents encryption in transit and at rest, periodic third-party security testing, and hosting on AWS infrastructure that’s itself SOC 2 compliant, but it doesn’t publish its own SOC 2 Type 2 attestation for the service.

Advisor Access: Boldin’s Flat-Fee CFP® vs. MaxiFi’s DIY Model

Boldin pairs its DIY Planner with two levels of human support: coaching at $250 a session for setup and tool guidance, and Boldin Advisors for a full CFP® review. The Retirement Plan Checkup runs a flat $3,200 for two sessions, an initial walkthrough and a written report covering withdrawal sequencing, Roth strategy, and stress testing, with ongoing advisory available from $1,200 a year for households that want continued check-ins.

MaxiFi doesn’t have a comparable advisory layer. Standard and Premium are self-directed. Premium Plus adds a single guided session focused on making sure your setup is right. If you want continued professional input alongside MaxiFi’s modeling, that means working with an outside advisor.

MaxiFi vs. Boldin: Pricing and Plans

The fairer feature-to-feature comparison isn’t PlannerPlus against MaxiFi’s cheapest tier. It’s PlannerPlus at $144 against MaxiFi Premium at $149, since that’s where both tools unlock Monte Carlo and Roth conversion optimization. At that level, the two are within five dollars of each other, and the decision comes down to the planning philosophy and account-linking tradeoffs above rather than price.

Which Is Better for You: MaxiFi or Boldin?

A single optimized number is easiest to trust the day you get it. Retirement doesn’t stay still that long. Tax brackets shift, RMDs start, Medicare premiums move with income, and the conversion window that made sense at 62 closes by 70.

MaxiFi’s living standard calculation is a snapshot you rerun by hand as those pieces move. Boldin’s Planner is built to hold all of them at once and update as they change, which is where a connected system earns its keep over a tool built to maximize one number.

What Independent Reviewers Say About MaxiFi and Boldin

Rob Berger has tested both tools, and uses Boldin to plan his own retirement. In his review of MaxiFi, he appreciated its Social Security tool and its light data-entry requirements. But he concluded that it was “not a tool [he] can recommend or plan to use,” pointing to its handling of sequence-of-returns risk and its conservative default assumptions as the reasons why.

The Finance Buff bought MaxiFi Premium to model a real housing decision. He found the calculations detailed but the Monte Carlo output hard to act on in practice. Looking at a range that swung from $50,000 to $200,000 a year depending on market returns, he put the problem plainly: “So do I spend $50,000 or $200,000?”

The White Coat Investor has reviewed both platforms and calls MaxiFi a worthy competitor, while steering readers toward Boldin as “the only one you need,” given how quickly it produces useful output.

Frequently Asked Questions About MaxiFi vs. Boldin