Five rating regions determine green slip prices
Geographical zone, like vehicle class, is an important factor in setting CTP greenslip prices.
Geographical zones or rating regions are allocated by State Insurance Regulatory Authority (SIRA). They are part of Premiums Determination issued by SIRA each year to the insurers. Insurers are required to set greenslip prices on the basis of rating regions set out in Motor Accident Guidelines.
NSW is divided into five rating regions in the Schedule of Premium Relativities for the purpose of setting greenslip prices. Five postcodes are split between two zones.
Information on vehicle classifications is also on this site.
The allocation of postcodes to zones is in the table below.
| Zone | Postcode | ||
| Metropolitan | 1001 to 2082 2084 to 2234 2555 to 2559 2561 to 2567 2745 to 2749 2751 2759 to 2770 |
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| Outer Metropolitan |
2568 to 2574 2752 2754 to 2755 2757 to 2758 2773 to 2786 |
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| Newcastle and Central Coast | 2250 to 2309 2314 to 2327 |
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| Wollongong | 2500 to 2526 2530 |
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| Country | 2311 to 2312 2328 to 2490 2527 to 2529 2532 to 2551 2575 to 2739 2787 to 2899 |
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| Split Postcode | Normal Zone | Exception Areas | Zone for Exception Areas |
| 2083 | Metropolitan | Mooney Mooney Cheero Point Bar Point Milsons Passage Cogra Bay |
Newcastle & Central Coast |
| 2560 | Metropolitan | Appin | Outer Metropolitan |
| 2750 | Metropolitan | Emu Plains (all suburbs) Leonay |
Outer Metropolitan |
| 2753 | Metropolitan |
Bowen Mountain Grose Vale Grose Wold Yarramundi Yarramundi Falls |
Outer Metropolitan |
| 2756 |
Metropolitan | Colo (all suburbs) Ebenezer Freemans Reach Glossodia Lower Portland Wilberforce (all suburbs) Sackville |
Outer Metropolitan |