Mainaro

What It Does

Mainaro is an AI-powered decision support tool designed specifically for German real estate investors who need to understand the true profitability of their properties after taxes. Instead of relying on spreadsheets or guesswork, Mainaro automatically calculates cash flow by accounting for interest, principal payments, depreciation (AfA), taxes, and reserves — giving investors a clear picture of what they actually earn each month.

Who It's For & The Problem It Solves

Mainaro targets German property investors — from first-time buyers to portfolio holders — who struggle to answer one critical question: Does my property actually make money after taxes? Most investors know their rental income but overlook how financing costs, tax deductions, and upcoming events like interest rate resets impact their real returns. Mainaro solves this by providing transparent, real-time cash flow analysis and proactive alerts for critical deadlines like speculation period expiration and financing renewals.

Key Features & Capabilities

• AI-Powered Document Processing: Upload contracts (purchase, mortgage, lease) and the AI extracts key data automatically — users review highlighted PDFs and confirm
• After-Tax Cash Flow Analysis: Deterministic calculation engine processes interest, amortization, depreciation, and taxes to show monthly net profit
• Location Scoring: Free macro-location analysis for 10,000+ German municipalities using official data (BORIS, BBSR, Destatis) across demographics, economy, infrastructure, and research
• DSCR Stress Testing: Debt Service Coverage Ratio monitoring to assess whether properties remain financially viable
• Exit Simulation: Calculate timing, speculation tax implications, and net proceeds before selling
• Smart Alerts (coming soon): Proactive notifications for financing expirations, negative cash flow, and tax deadlines
• Portfolio Dashboard: Consolidated view across multiple properties with traffic-light status indicators

Typical Workflows

Investors follow a six-phase journey through Mainaro: (1) pre-purchase location scoring and yield checking, (2) acquisition with automatic capture of closing costs and depreciation basis, (3) financing tracking including prepayment and refinancing scenarios, (4) ongoing operations monitoring for cash flow and reserves, (5) renovation impact analysis showing tax effects, and (6) exit planning with timing optimization and net proceeds calculation.

What Differentiates Mainaro

Unlike generic spreadsheets or expensive consultant reports, Mainaro combines transparent official data sources with AI convenience while maintaining calculation integrity — the AI reads and formats, but a deterministic engine handles all financial math. The platform is GDPR-compliant by design, processing data within the EU without sharing personal information with third-party AI services. Location analysis that competitors charge for is included free for every property and searchable address. Users can drill down to individual data points rather than accepting black-box ratings.

Pricing & Integration

Mainaro offers a freemium model: the first property is completely free, and the Starter plan (€4.99/month or €49.99/year) supports up to 5 properties with 30-day free trial. The platform operates as a web application with document upload capabilities and WhatsApp contact support. Integration with DATEV and B2B systems is planned.