# Roi Calculator

> ROI calculation framework. pricing-strategist and solution-architect agent proposal investment versus revenue to do when reference. 'ROI total', 'costanalysis', 'TCO' request when usage. However, financial company tax scope outside.

- Skill: `revfactory/roi-calculator` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add revfactory/roi-calculator`
- Raw SKILL.md: https://api.skillmd.com/api/skills/revfactory/roi-calculator/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: revfactory (https://skillmd.com/u/revfactory)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/revfactory/roi-calculator

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# ROI Calculator — ROI calculation framework

pricing-strategist / solution-architect agent investmentrevenue analysis tablelevel.

## ROI basic official

```
ROI = (profit / totalinvestmentcost) × 100

profit = total revenue - total cost
totalinvestmentcost = initial investment + operations cost
```

## TCO (Total Cost of Ownership) analysis

### cost category

| category | item | calculation standard |
|---------|------|----------|
| initial investment | , , building | daywhen |
| implementation cost | , , training | project duration |
| operations cost | maintenancereportnumber, personcase, person | annualbetween |
| cost | nature , opportunitycost, risk | estimation |

### TCO comparison template

| cost item | current(AS-IS) | proposal(TO-BE) | gap |
|----------|-----------|-----------|------|
| initial investment | ₩0 | ₩500M | +₩500M |
| annualbetween operations | ₩300M | ₩100M | -₩200M |
| 3year TCO | ₩900M | ₩800M | -₩100M |
| 5year TCO | ₩1500M | ₩1000M | -₩500M |

## Payback Period (investmentnumberduration)

```
 investmentnumberduration = initial investment / annualbetween currentflow

examplewhen:
 initial investment: ₩500M
 annualbetween reduction: ₩200M
 Payback = 5 / 2 = 2.5year
```

## NPV (currentvalue)

```
NPV = Σ [CF_t / (1+r)^t] - initialinvestment

CF_t = tyear also currentflow
r = to doperson (report WACC or goalrevenuerate)
t = annualgap (1~N)

judgment standard:
 NPV > 0 → investment value 
 NPV < 0 → investment basiseach
```

### NPV total template

| annual also | currentflow | to dopersontotalnumber(10%) | currentvalue |
|------|---------|-------------|---------|
| 0 | -₩500M | 1.000 | -₩500M |
| 1 | ₩1.500M | 0.909 | ₩1.3600M |
| 2 | ₩200M | 0.826 | ₩1.6500M |
| 3 | ₩2.500M | 0.751 | ₩1.8800M |
| 4 | ₩2.500M | 0.683 | ₩1.7100M |
| 5 | ₩2.500M | 0.621 | ₩1.5500M |
| **NPV** | | | **₩3.1500M** |

## IRR (withindepartmentrevenuerate)

```
IRR = NPV = 0 to doperson

judgment standard:
 IRR > WACC → investment value 
 IRR > goalrevenuerate → investment capabilityquality

tablecurrent:
 " investment IRR 28%, 
 company revenuerate 15% "
```

## naturequality 

### categoryby calculation method

| type | calculation method | examplewhen |
|----------|----------|------|
| time reduction | reduction time × whengrade × annualbetween number | 20h × ₩5 only × 50 = ₩5 only |
| error decrease | error casenumber decrease × case cost | 100case × ₩50 only = ₩5 only |
| nature | processing increase × case revenue | +200case × ₩10 only = ₩2 only |
| rate decrease | decrease personKRW × hiringcost | 5people × ₩2 only = ₩100M |
| client | NPS → re- → sales | between estimation |

## scenario analysis

| scenario | | ROI | Payback |
|---------|------|-----|---------|
| reportnumberquality (Pessimistic) | 50%, cost 120% | 85% | 3.2year |
| basic (Base) | 100%, cost 100% | 180% | 2.1year |
| quality (Optimistic) | 130%, cost 90% | 290% | 1.4year |

**proposal **: reportnumberquality scenariofrom also investment value persuasioncapability .

## proposal ROI tablecurrent guide

### Korean degree ROI summary

```
┌──────────────────────────────┐
│ investment summary │
│ total investment: ₩500M │
│ 3year ROI: 180% │
│ Payback: 2.1year │
│ NPV: ₩3.1500M (to doperson 10%) │
│ │
│ core Top 3: │
│ 1. operations reduction: annual ₩200M │
│ 2. nature : annual ₩8 only │
│ 3. error cost decrease: annual ₩5 only │
└──────────────────────────────┘
```

## quality checklist

| item | standard |
|------|------|
| cost completeness | TCO 4versus category |
| basis | each calculation specify |
| scenario | reportnumberquality/basic/quality 3items |
| to doperson | basis specify (WACC etc.) |
| whentotal | minimum 3year, recommended 5year |
| risk | key also analysis |