Are there any financial planning platforms that handle inputs from retirement, taxable, and outside accounts?

Yes — several financial planning platforms can aggregate and model retirement accounts, taxable brokerage accounts, and outside accounts (like bank accounts, HSAs, 529s, loans, and even held-away assets).

Here are some common categories and examples:

1. Consumer financial planning / aggregation tools

These are good for personal use and often sync many account types:

• Empower Personal Dashboard (formerly Personal Capital)
• Quicken Simplifi
• Monarch Money
• Copilot Money (more budgeting-focused, but can link many accounts)
• Tiller (spreadsheet-based, for people who want customization)

2. More advanced retirement / planning tools

These often support scenario planning across account types:

• ProjectionLab
• NewRetirement
• Boldin (formerly NewRetirement; depending on the product tier)
• RightCapital (often used by advisors, but some consumer access exists through advisors)

3. Advisor / professional-grade planning platforms

These are typically used by financial advisors, but some clients can access them through an advisor:

• eMoney Advisor
• MoneyGuidePro
• RightCapital
• FP Alpha (more of a planning/analysis add-on)

What they usually can handle

Most of these can model:

• 401(k), 403(b), IRAs, Roth IRAs
• Taxable brokerage accounts
• Checking/savings
• HSAs and 529s
• Debt
• Social Security and pensions
• Manual “outside” accounts that don’t sync automatically

A few things to check before choosing

Look for whether the platform supports:

• Held-away account linking via Plaid/Aggregation
• Manual entry for assets that won’t connect
• Tax-aware projections for taxable vs. retirement withdrawals
• Roth conversion and withdrawal sequencing modeling
• Estate planning / legacy modeling if relevant

If you want, I can also give you:

1. a comparison table of the best options, or
2. recommendations based on whether you want budgeting, retirement planning, or advisor-grade planning.