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Accounts receivable - Net: (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Accounts receivable - Net: |
Schedule of accounts receivable - net |
|  | December 31,
|  | 2019 |  | 2020
Clients |  | Ps. | 1,195,559 |  | Ps. | 1,458,653
Less: impairment provision |  |  | (191,766) |  |  | (346,183)
|  |  | 1,003,793 |  |  | 1,112,470
Notes receivable from clients |  |  |  |  |  | 245,757
Total accounts receivable |  | Ps. | 1,003,793 |  | Ps. | 1,358,227
Schedule of maturity analysis of past due accounts receivable and movements in impairment provision |
Provision for impairment at January 1,2019 |  | Ps. | 179,639
Application, net of Mexico's estimate during the period |  |  | (369)
Application, net of Aerostar's estimate during the period |  |  | (5,585)
Airplan's provision impairment |  |  | 18,081
Provision for impairment at December 31,2019 |  | Ps. | 191,766
Application, net of Mexico's estimate during the period |  | Ps. | 70,470
Application, net of Aerostar's estimate during the period |  |  | 50,842
Airplan's provision impairment |  |  | 33,105
Provision for impairment at December 31,2020 |  | Ps. | 346,183
Schedule of provision for losses |
|  |  |  |  |  |  |  |  |  | More than |
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | 365 |
Expected loss rate 2019: |  |  |  |  |  |  |  |  |  |  |
Mexico |  | 0.02 | % | 0.02 | % | 0.02 | % | 100 | % | 100 | %
Aerostar |  | 1.00 | % | 2.5% - 5.0 | % | 15.00 | % | 50.00 | % | 100 | %
Airplan |  | 0.83 | % | 0.83 | % | 0.83 | % | 100 | % | 100 | %
|  | Due to |  |  |  |  |  |  |  | More than |
Expected loss rate 2020: |  | expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | 365 |
Mexico |  | 0.00 | % | 0.02 | % | 19.20 | % | 100 | % | 100 | %
Aerostar |  | 5.40 | % | 5.10 | % | 43.70 | % | 88 | % | 100 | %
Airplan |  | 0.83 | % | 0.70 | % | 0.83 | % | 100 | % | 100 | %
|  |  |  |  |  |  |  |  |  |  |  |  |  | More |  | Total estimate
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | than 365 |  | 12/31/2019
At December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mexico’s accounts receivables |  |  | — |  | Ps. | 1,012 |  | Ps. | 1,733 |  | Ps. | 126 |  | Ps. | 128,930 |  |  | —
Mexico’s provision impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 128,930 |  | Ps. | 128,930
Aerostar’s account receivables |  | Ps. | 159,796 |  |  | 97,697 |  |  | 2,176 |  |  | 712 |  |  | 31,236 |  |  | —
Aerostar’s provision impairment |  |  | 1,599 |  |  | 3,611 |  |  | 544 |  |  | 499 |  |  | 31,236 |  |  | 37,489
Airplan’s accounts receivables |  |  | — |  |  | 114,858 |  |  | 52,410 |  |  | 15,357 |  |  | 8,602 |  |  | —
Airplan’s provision impairment |  |  | — |  |  | 953 |  |  | 435 |  |  | 15,357 |  |  | 8,602 |  |  | 25,347
Total estimate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Ps. | 191,766
|  |  |  |  |  |  |  |  |  |  |  |  |  | More |  | Total estimate
|  | Due to expire |  | 1 to 90 |  | 91 to 180 |  | 181 to 365 |  | than 365 |  | 12/31/2020
At December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mexico’s accounts receivables |  | Ps. | 474,854 |  | Ps. | 59,819 |  | Ps. | 14,292 |  | Ps. | 66,816 |  | Ps. | 129,056 |  |  | —
Mexico’s provision impairment |  |  |  |  |  | 784 |  |  | 2,744 |  |  | 66,816 |  |  | 129,056 |  | Ps. | 199,400
Aerostar’s account receivables |  |  | 444,515 |  |  | 60,421 |  |  | 3,702 |  |  | 4,896 |  |  | 55,360 |  |  | —
Aerostar’s provision impairment |  |  | 23,984 |  |  | 3,084 |  |  | 1,619 |  |  | 4,284 |  |  | 55,360 |  |  | 88,331
Airplan’s accounts receivables |  |  |  |  |  | 73,865 |  |  | 1,610 |  |  | 37,214 |  |  | 32,233 |  |  | —
Airplan’s provision impairment |  |  |  |  |  | 516 |  |  | 110 |  |  | 25,593 |  |  | 32,233 |  |  | 58,452
Total estimate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Ps. | 346,183

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