ArthaPilot

Asset location and household tax

Where every asset belongs. Modeled after tax.

Portfolio tax modeling across every account you own.

Every result shows its inputs and its method. Each check is published with its source in the verification suite.

No account needed for the sample household or the historical backtest. Sign in free to save an analysis.

One household, every tool

Everything the tools read.

What each tool reads from this household

Household
What do we hold, and where? $1,274,100. 4 accounts across 2 members, with every tax lot.
Tax-Aware Allocator
Is anything off target? VTI +19.36%. The largest drift from the household target allocation.
Household Tax Opportunities
What can we harvest this year? $21,440. Harvestable losses, the largest $15,600 in BND.
Asset-Location Backtester
Would different placement cost less? $12,487 to $11,442. Modeled annual tax drag under a compared account placement.
Roth Conversion Planner
How much room is there before RMDs? $549,545. Modeled conversions across 5 years, inside the bracket.

Model your portfolio through history, before and after tax.

Illustrative transaction log
DateAssetTradeGain or lossIllustrative tax drag
2022-01-15VTIBuyN/A0.0%
2022-04-08VXUSSell+$740−0.1%
2022-09-22VTISell+$1,280−0.3%
2023-01-11BNDBuyN/A−0.3%
2023-03-06VXUSSell−$960−0.3%
2023-07-18VTISell+$890−0.5%
2023-11-03BNDSell+$420−0.7%
2024-02-14VTISell+$2,180−1.0%
2024-05-29VXUSBuyN/A−1.0%
2024-08-12SCHXSell−$610−1.0%
2024-10-07VTIBuyN/A−1.0%
2025-01-22BNDSell+$340−1.2%
2025-04-03VTISell+$1,520−1.5%

Start with a portfolio question

Each path opens a completed example. Change one input and rerun it.

  1. How do account types change where assets are held?Tax-Aware Allocator
  2. How would a Roth conversion change modeled taxes before RMDs?Roth Conversion Planner
  3. How does my retirement date change the plan?Retirement Planner
  4. How did my portfolio compare with the market?Portfolio Backtest