What planbend Actually Does: Budget and Retirement in One Plan

Most people trying to answer "am I on track?" end up with two tools that don't talk to each other: a budgeting app that knows exactly what they spent on groceries last month but has no opinion about retirement, and a retirement calculator that asks for one number for annual spending and ignores everything else. The gap between them is where the actual question lives.

planbend exists to close that gap. This is a plain description of what the app does, what it models, and where it stops.

One engine, not two tools

The core design decision is that your budget and your retirement projection are the same model. The money you don't spend this month is the money that compounds; the categories that disappear when you stop working are the ones that change your retirement number. Treating those as separate exercises loses the connection that matters most.

In practice that means when you adjust a spending category, your projected retirement date moves. When you add a car loan, the payoff date shows up in the cash flow forecast and the freed-up payment flows into savings afterwards. Nothing needs re-entering in a second place.

What you can model

Budget and cash flow

Spending across categories, with sinking funds for the irregular costs that wreck otherwise-fine budgets (car registration, insurance premiums, the annual vet bill), a recurring bills and paycheck calendar, and a forecast that flags the specific month your balance dips lowest. There's also an actual-versus-budgeted view for logging what you really spent against what you planned.

Income, including the complicated kinds

Salary, self-employment with SE tax and QBI, bonuses, RSUs and stock options with vesting schedules, pensions, and rental income. Two earners can be modelled on separate timelines, which matters more than it sounds: households where one person retires years before the other are common and badly served by tools that assume a single retirement date.

Retirement projection

A year-by-year projection out to life expectancy using your real account balances, contributions, and growth assumptions. It covers the ordinary accounts (401k, 403b, IRA, Roth, HSA, taxable brokerage) and applies the rules that actually bite: required minimum distributions, Social Security taxation thresholds, long-term capital gains brackets, and state income tax including the states that exempt pension income.

The health insurance gap

If you stop working before 65, you cover your own health insurance until Medicare starts. Depending on age, household size, and income that can run well over a thousand dollars a month, and it's one of the biggest variables in any early retirement plan. planbend models those gap years directly rather than treating them as a footnote. The health insurance gap calculator covers the same ground as a standalone estimate.

Roth conversions and IRMAA

Conversion ladders modelled against tax bracket headroom, with visibility into where a conversion pushes you across an IRMAA threshold and raises your Medicare premiums years later. The interaction between conversions, bracket space, and IRMAA tiers is genuinely difficult to hold in your head, which is exactly the sort of thing software should be doing.

College and 529 planning

Education costs projected per child, with the overlap years surfaced explicitly. Two children three years apart produce a stretch where you're funding two enrolments at once, usually landing in what should be your peak saving years. That overlap is where the cash flow problem actually is, and it's invisible if you model each child separately.

Withdrawal strategy and stress testing

Withdrawal orders compared side by side on lifetime tax, IRMAA exposure, and portfolio longevity. Monte Carlo and historical sequence-of-returns runs show a range of outcomes rather than one confident line, which is a more honest way to look at a forecast that depends on markets nobody can predict.

Net worth, debt, and what-ifs

Accounts, property, vehicles, equity compensation, and liabilities in one place, with a debt payoff planner comparing snowball against avalanche on your real balances. Named scenarios let you save a version of the plan and compare it against another, so "what if I retire at 55 instead of 60" is a comparison rather than a thing you do twice and try to remember.

No bank linking needed

planbend works entirely from figures you enter. Nothing asks for banking credentials, and the full projection runs without connecting an account anywhere. For a tool whose job is modelling rather than transaction tracking, the balances and contribution rates you can read off a statement in a few minutes are enough to get a real answer.

Account connection is on the roadmap, and when it arrives it will be optional, aimed at saving you the typing rather than becoming a requirement. Until then everything works the way it does today.

You also don't need an account to start. The app opens and works immediately, saving to your browser. Creating a free account backs that up and syncs across devices, which browser-only storage genuinely cannot do, but it's a choice rather than a gate.

What it deliberately doesn't do

Worth being direct about, because the wrong tool wastes your evening:

• It doesn't hold, move, or trade money. It's a planning layer, not a bank or a brokerage.
• It doesn't automatically categorise transactions. Logging actual spending is something you do, not something that happens to you.
• It isn't tax preparation software. The tax modelling is detailed enough for planning decisions and not a substitute for filing.
• It isn't advice. It shows what your assumptions imply; it doesn't tell you what to do, and it doesn't know the things about your life you haven't typed in.
• It's built around the US tax system: federal brackets, state income and property tax, IRMAA, RMDs, 529s, and ACA subsidies. If you're planning outside the US, much of the engine won't apply to you.

Who it suits

It fits best if your situation has more than one moving part: a household with two incomes retiring at different times, kids heading toward college while you're still saving, equity compensation, a retirement date before 65, or a Roth conversion window between retiring and claiming Social Security. Those are the cases where a single-number calculator stops being useful.

If you want a simple answer to one narrow question, a focused calculator is faster and there are twenty of them here, free and with no signup. Use those first. The app is for when the questions start interacting.

Starting without committing an evening

The opening questions take a couple of minutes: where you are in your journey, who's in the household, ages, income, roughly what you spend, and what you've saved. That's enough for a real projection, and the app tells you when you've crossed that line so you know you can stop. Everything after that refines the number rather than unlocking it.

If you'd rather see what a finished plan looks like before entering anything of your own, there's a complete sample plan you can open and change freely. Nothing in it is saved, and it won't touch a plan of yours.

Common questions