# Solar Simple Payback Calculator

Compare an entered capital outlay with annual net savings.

[Open this tool](https://whatson.pk/payback-calculator/)

Category: Solar & Battery

Simple payback compares the initial outlay with a constant yearly net saving. It is a first recovery measure rather than a full investment model.

Enter installation cost, annual value and yearly expenses. Read the period only when net savings are positive.

## Inputs and controls

* Total upfront cost (PKR). Allowed range: 0 to 1000000000000
* Annual gross savings (PKR/year). Allowed range: 0 to 1000000000000
* Annual extra cost (PKR/year). Allowed range: 0 to 1000000000000

## How to use

* Enter total upfront cost, annual gross savings and annual extra cost.

* Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.


## Why use this tool

The explicit net saving helps you see how maintenance or other annual costs change the basic recovery estimate.


## Before relying on the result

Simple undiscounted payback assumes constant annual savings and costs. It ignores financing, degradation, replacement timing and tariff changes. Nonpositive net savings has no finite payback.


## Tool limitations

Simple undiscounted payback assumes constant annual savings and costs. It ignores financing, degradation, replacement timing and tariff changes. Nonpositive net savings has no finite payback.

## Questions

### Does payback include financing or degradation?

No. Those require a more detailed cashflow model rather than this constant annual calculation.

### What should I check before using Solar Simple Payback Calculator?

Check Total upfront cost, Annual gross savings and Annual extra cost. Use the exact units shown beside the controls and replace any example values with your own inputs.

Source page last modified (UTC): 2026-10-01T18:56:36+00:00

This profile describes the tool. It does not execute it or supply a professional certification.