Free tool

Downtime cost calculator

Estimate what an outage costs in lost revenue, SLA exposure, and churn — then decide how fast detection has to be.

Inputs

Your numbers

Estimated cost of this outage

$3,260

Lost revenue during outage: $10
SLA penalty exposure: $1,000
Churn cost: $2,250

Estimates only — SLA credits depend on your customer contracts, not Tallwatch. Detection speed only helps if on-call trusts the page. How downtime cost is calculated.

SLA budgets: 99.9%, 99.99%, 99.999%

Cut downtime cost with consensus alerts

Tallwatch pages you only when regions agree — so on-call can move on real outages instead of noise.

Start free with Tallwatch

Agent

Page as markdown

Raw agent-readable copy for this route. Copy it into a model, or browse the site-wide agent index at /llms.txt.

---
title: "Downtime cost calculator"
description: "Estimate the cost of downtime for your business."
canonical: https://tallwatch.com/tools/downtime-calculator
url: https://tallwatch.com/tools/downtime-calculator
llms_url: https://tallwatch.com/llms.txt
updated: 2026-09-03
---
Free tool

# Downtime cost calculator

Estimate what an outage costs in lost revenue, SLA exposure, and churn — then decide how fast detection has to be.

Inputs
## Your numbers

The calculator estimates cost from monthly recurring revenue, outage duration in minutes, SLA tier, monthly active users, average customer LTV, and churn per hour of downtime.

- Lost revenue during outage — MRR spread across 730 hours, scaled by outage length
- SLA penalty exposure — illustrative credit exposure based on SLA tier and outage length vs ~43.8 min/month budget (not Tallwatch's product SLA)
- Churn cost — users × churn rate × outage hours × LTV

## Default example

With $10,000 MRR, a 45-minute outage, 99.9% SLA tier, 500 monthly active users, $1,200 average LTV, and 0.5% churn per hour, the calculator sums revenue loss, SLA exposure, and churn cost into a total outage cost.

## Cut downtime cost with consensus alerts

Tallwatch pages you only when regions agree — so on-call can move on real outages instead of noise.

[Start free with Tallwatch](https://app.tallwatch.com/sign-in)