Withholdr

Withholdr is a web + mobile AI-assisted tax planning app that continuously estimates your year-end tax position and tells you exactly how to adjust W-4/withholding and quarterly payments. Users connect payroll (or upload paystubs), bank/credit card transactions, and brokerage/crypto exports; the app categorizes income, flags deductible expenses, and models scenarios like bonuses, RSUs, side gigs, and capital gains. It generates plain-English action steps (e.g., “Increase federal withholding by $185 per paycheck” or “Pay $1,250 by Sep 15 to avoid underpayment penalties”) and produces ready-to-file payment vouchers and calendar reminders. It’s not a full tax filing replacement; it’s a proactive planning layer that reduces penalties, cash-flow shocks, and anxiety. The MVP should focus on accuracy, auditability of calculations, and simple, defensible recommendations rather than fancy “maximize refunds” promises.