Penelitian ini menganalisis proyek implementasi Pajak Daerah melalui online system oleh PT. Bank DKI untuk proses pengambilan keputusan. Metode yang digunakan adalah analisis discounted cash flow dengan Net Present Value menggunakan alternatif target implementasi seluruh wajib pajak, wajib pajak terkomputerisasi atau wajib pajak manual, sementara pilihan metode implementasi adalah metode tapping, software atau mobile. Penelitian ini menyimpulkan bahwa kombinasi target wajib pajak manual dan metode tapping membutuhkan waktu lebih lama untuk mencapai NPV positif dan kombinasi wajib pajak terkomputerisasi dan metode mobile memberikan nilai NPV paling besar, namun memberikan potensi manipulasi data oleh wajib pajak, sehingga metode software lebih baik dalam hal potensi tersebut.

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This research analyses tax online system implementation project by PT. Bank DKI for decision making. Method being used is discounted cash flow analysis with net present value using target alternative all tax subject, computerized tax subject and manual tax subject, alternative implementation methods used are tapping, software and mobile methods.

This research concludes that combination of manual tax subject and tapping method takes longer time to reach positive NPV, while combination of computerized tax subject with mobile method gives higher NPV within less than 1 year implementation. Furthermore, mobile method has vunerable threat to be manipulated by tax subject, while software method give short time to positive NPV and able to secure the tax data from manipulation by tax subject.