PropertyMaths: Portfolio ROI & Tax Optimisation
How GetPost Labs approaches property investment analytics. Portfolio ROI, depreciation scheduling, and data-driven sell/hold decisions.
Executive Summary
The Problem: Property investors can't answer basic questions: Which property performs best? What's my actual cash position? Should I sell or hold? Decisions are based on gut feel, not data.
The Solution: PropertyMaths auto-reconciles rental income, calculates depreciation, shows true ROI across the portfolio, and provides data for sell/hold decisions.
The Outcome: Investors move from annual surprises at tax time to monthly visibility into portfolio performance. Decisions are made with data.
The Challenge
Understanding the problem space
"With 6 investment properties, I couldn't answer basic questions: Which property performs best? What's my actual cash position? Every decision was based on gut feel."
— Private investor, Sydney
Australian property investors often own multiple properties across different states with different property managers, loan structures, and depreciation schedules. Getting a consolidated view requires pulling data from multiple sources manually.
Most investors rely on their accountant once a year to understand performance. By then, opportunities to optimise have passed. Negative gearing benefits, depreciation claims, and cash flow implications are unclear until tax time.
The Solution
What GetPost Labs would build
Core Capabilities
How Investment Decisions Improve
Data-driven, not gut feel
Better decisions come from having accurate, current data on every property:
Performance Visibility
Open 4 property manager portals, 3 bank accounts, and a spreadsheet. Manually calculate yield for each property.
Open PropertyMaths — all 6 properties with gross yield, net yield, and cash flow displayed. Underperformers flagged.
Tax Preparation
Spend 2 days gathering statements, categorising expenses, and calculating depreciation. Hope nothing is missed.
Click "Export Tax Summary" — ATO-ready report with all income, expenses, and depreciation. 5 minutes.
Sell/Hold Decisions
Ask agent for market opinion. Compare to what you think you're earning. Gut feel decision.
PropertyMaths shows: capital gain scenario, ongoing yield trajectory, tax implications of selling, and opportunity cost of holding.
BPMN Workflow
The business process modelled
Monthly Portfolio Review Process
User Journey
Monthly Portfolio Review
Scenario: Property investor with 6 properties needs to review performance and prepare for tax planning.
All rental income from 6 property managers auto-matched to properties. $28,450 total received this month
Forwarded repair invoices auto-categorised: $1,200 repairs (deductible), $450 insurance, $380 council rates
Opens app on phone. Sees portfolio yield: 4.8% gross, 3.2% net. One property flagged: "Underperforming"
Taps underperforming property. Sees: Vacancy 3 weeks last month, yield dropped to 2.1%. Suggestion: Review rent pricing
Auto-calculates YTD depreciation across all properties: $42,000. Shows impact on taxable income
Clicks "Export Tax Summary". PDF generated with all income, expenses, depreciation ready for accountant
Accountant receives ATO-ready report via email. All supporting documents linked. EOFY prep done in minutes
Outcome: Portfolio reviewed in 10 minutes. Tax prep that took 2 days now takes 5 minutes.
Interactive Prototype
Functional dashboard demonstrating the concept
Portfolio ROI
True returns visibility
© 2026 GETPOST Labs. Full Stack Engineering Solutions.
Functional prototype. Click on cells and entries to see interactions.
System Context
Where PropertyMaths fits in the ecosystem
Have a Similar Problem?
This is the kind of workflow automation GetPost Labs builds. If your organisation has similar challenges, we'd love to discuss how a custom solution might help.