Calculate the new UA both ways, with and without rounding. The new UA will be whichever method provides the higher UA. The table below shows two examples.
Example 1 results in a UA of $46, both with and without rounding. The UA will therefore be $46. In Example 2, the UA with rounding results in a UA of $82; without rounding, the UA is $81. The UA will therefore be $82.
First-Year Adjustment
Example 1
Example 2
Current UA
$50 (gas: $15; electricity: $35)
$75 (gas: $10; electricity: $65)
UAF
Gas: 0.892Electricity: 0.992
Gas: 1.018Electricity: 1.039
First-year adjustment
$15 x 0.892 = $13.38$35 x 0.992 = $34.72
$10 x 1.018 = $10.18$65 x 1.039 = $67.54
New UA
$13.38 + $34.72 =$48.10New UA = $48
$10.18 + $67.54 =$77.72New UA = $78
Second-Year Adjustment
Current UA
$48 (gas: $13; electricity: $35)
$78 (gas: $10; electricity: $68)
UAF
Gas: 0.892Electricity: 0.992
Gas: 1.018Electricity: 1.039
With Rounding
Second-year adjustment
$13 x 0.892 = $11.60$35 x 0.992 = $34.72
10 x 1.018 = $11.08$68 x 1.039 = $70.65
New UA
$11.60 + $34.72 =$46.32New UA = $46
$11.08 + $70.65 =$81.73New UA = $82
Without Rounding
Second-year adjustment
$13.38 x 0.892 =$11.93$34.72 x 0.992 =$34.44
$10.18 x 1.018 =$10.36$67.54 x 1.039 =$70.17
New UA
$11.93 + $34.44 =$46.37New UA = $46
$10.36 + $70.17 =$80.53New UA = $81