Water Connection Charges Calculator

Work out water connection charges instantly with clear inputs, formula shown and shareable results.

About Water Connection Charges Calculator

A new water connection attracts a connection fee scaled by tap size, a refundable security deposit, and road cutting and restoration charges where the main is across a paved road. Separating refundable from non-refundable matters for cash flow and for the project cost that can be capitalised.

Formula

Connection charges

Total = connection size x rate per mm + road restoration + refundable deposit

Worked example

With the default values below, Water Connection Charges Calculator returns Total payable at application of $33,000.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Connection sizeminimum 5 mm: 25 mm
Connection charge rateminimum 0 per mm: 800 per mm
Refundable security depositminimum 0: 5,000
Road cutting and restorationminimum 0: 8,000

Results

Total payable at application: $33,000.00
Connection fee: $20,000.00
Refundable component: $5,000.00
Non-refundable component: $28,000.00

Step by step

1Values used
2Connection charges
3Total payable at application= 33,000.00
4Connection fee= 20,000.00
5Refundable component= 5,000.00
6Non-refundable component= 28,000.00

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Preliminary estimate only. Connection charges, deposits and restoration fees are set by the water utility and must be confirmed locally.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Preliminary estimate only. Connection charges, deposits and restoration fees are set by the water utility and must be confirmed locally.

Frequently Asked Questions

How is the Water Connection Charges figure worked out?

Total = connection size x rate per mm + road restoration + refundable deposit. A new water connection attracts a connection fee scaled by tap size, a refundable security deposit, and road cutting and restoration charges where the main is across a paved road.

Why does the charge scale with tap size?

Larger connections draw more water and impose more load on the network, so the tariff acts as a capacity charge as well as a work cost recovery.

What values do I need to enter?

This calculator takes 4 inputs: Connection size, Connection charge rate, Refundable security deposit, Road cutting and restoration. The pre-filled defaults are a realistic worked example — replace them with your own site or project figures.