Dual implementation structure
Early adopters have to implement the standard in 2017, which therefore requires the exchange of 2016 tax data. The second group of signatories – which includes Switzerland will start in 2018, and thus exchange 2017 tax data. So if your organisation includes foreign subsidiaries, you'll have to prepare sooner than with a purely domestic operation.
Estimate the impact of CRS/AIE accurately
Most financial service providers are familiar with the FATCA provisions. Though this experience is helpful, CRS/AIE requirements are far more comprehensive.
CRS/AIE has a strategic component
The new standard will force you to think about your core markets. The more markets you serve, the greater the administrative burden involved in meeting the transparency requirements.