# Calculate your 12-month average revenue drop

Your 12-month average revenue drop is the average of your applicable monthly revenue drops from March 2020 to February 2021 (CEWS claim period 1 to 13, excluding either claim period 10 or 11).

## When to calculate the 12-month average revenue drop

You only need to calculate the 12-month average revenue drop one time. You use the same 12-month average revenue drop for all of your claims from period 22 onward.

For details on the math behind the calculation, refer to how the 12-month average revenue drop is calculated.

## Differences between the 12-month average revenue drop and the claim period revenue drop calculations

Include revenue increases
You must include revenue for all months between March 2020 and February 2021 that relate to claim periods during which you either operated or were not operating due to a public health restriction. This means if any of the months you calculate had a revenue increase instead of a drop, you must include it as part of your 12-month average calculation.
Deeming rule does not apply
Unlike the claim period revenue drop, there is no deeming rule provision for the 12-month average revenue drop that allows you to use the better of two rates. You must include the actual revenue drop calculation for each reference period.
Must exclude months when not operating

If you were not operating for any length of time in any of claim periods 1 to 13, you must exclude the corresponding reference month from the 12-month average revenue drop, unless the reason for not operating was due to a public health restriction, in which case you must include the month in your calculation. An example of you not operating throughout a claim period would be in the case of a seasonal closure.

As the reference month for both claim periods 10 and 11 is December, you only need to exclude December if you were not operating throughout both claim periods.

## Calculate your 12-month average revenue drop

You must use the same comparison methods for the 12-month average revenue drop calculation as you used for your CEWS and CERS claims.

1. ### Comparison method for periods 1 to 4

Which pre-crisis revenue comparison option did you use to calculate eligibility for CEWS periods 1 to 4 (March 15th to July 4th, 2020)? (required)

Your choice must be consistent with the option you used for any of these periods you applied for. If you did not apply for any of them, you can decide on an option now.

If you were not operating in March 2019, you must use the average of January and February 2020.

2. ### Average your revenue drops for March to June

Eligible revenue

You must select a comparison method in step 1 to proceed.

3. ### Comparison method for periods 5 to 13

Which pre-crisis revenue comparison option did you use to calculate eligibility for CEWS periods 5 to 13 or CERS periods 1 to 6 (July 5 to March 13, 2021)? (required)

If you applied for any of these periods, ensure that your choice is consistent with past applications and CEWS and CERS rate calculations. If you did not apply for these periods, you can decide on an option now.

4. ### Average your revenue drops for July to February

Eligible revenue

You must select a comparison method in step 3 to proceed.

5. Result

### Your 12-month average revenue drop summary

Your 12-month average revenue drop is 0.00%.

The 12-month average revenue drop is calculated as the average of your revenue drops for all months that relate to claim periods during which you were either operating or not operating because you were subject to a public health restriction in a period.

Calculation summary

Save your 12-month average revenue drop summary for THRP and HHBRP calculations for periods 22 to 28

You can then go back to Step 2 of the wage subsidy calculator or rent subsidy calculator to input your 12-month average revenue drop and continue to calculate your subsidy for claim periods 22 and onward.

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